/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 16:49:31,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 16:49:31,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 16:49:31,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 16:49:31,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 16:49:31,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 16:49:31,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 16:49:31,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 16:49:31,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 16:49:31,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 16:49:31,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 16:49:31,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 16:49:31,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 16:49:31,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 16:49:31,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 16:49:31,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 16:49:31,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 16:49:31,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 16:49:31,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 16:49:31,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 16:49:31,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 16:49:31,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 16:49:31,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 16:49:31,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 16:49:31,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 16:49:31,234 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 16:49:31,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 16:49:31,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 16:49:31,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 16:49:31,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 16:49:31,236 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 16:49:31,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 16:49:31,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 16:49:31,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 16:49:31,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 16:49:31,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 16:49:31,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 16:49:31,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 16:49:31,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 16:49:31,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 16:49:31,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 16:49:31,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 16:49:31,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 16:49:31,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 16:49:31,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 16:49:31,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 16:49:31,285 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 16:49:31,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 16:49:31,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 16:49:31,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 16:49:31,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 16:49:31,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 16:49:31,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 16:49:31,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 16:49:31,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 16:49:31,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 16:49:31,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 16:49:31,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 16:49:31,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 16:49:31,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 16:49:31,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 16:49:31,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 16:49:31,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 16:49:31,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 16:49:31,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 16:49:31,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 16:49:31,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 16:49:31,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 16:49:31,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 16:49:31,289 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 16:49:31,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 16:49:31,289 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 16:49:31,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 16:49:31,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 16:49:31,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 16:49:31,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 16:49:31,599 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 16:49:31,599 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 16:49:31,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-08-21 16:49:31,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5232fb489/ac709dac64de49a8a93a027345f79610/FLAG7e4315466 [2021-08-21 16:49:32,138 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 16:49:32,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-08-21 16:49:32,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5232fb489/ac709dac64de49a8a93a027345f79610/FLAG7e4315466 [2021-08-21 16:49:32,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5232fb489/ac709dac64de49a8a93a027345f79610 [2021-08-21 16:49:32,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 16:49:32,455 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 16:49:32,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 16:49:32,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 16:49:32,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 16:49:32,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0e6a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32, skipping insertion in model container [2021-08-21 16:49:32,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 16:49:32,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 16:49:32,751 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-08-21 16:49:32,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 16:49:32,775 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 16:49:32,830 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i[30964,30977] [2021-08-21 16:49:32,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 16:49:32,869 INFO L208 MainTranslator]: Completed translation [2021-08-21 16:49:32,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32 WrapperNode [2021-08-21 16:49:32,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 16:49:32,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 16:49:32,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 16:49:32,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 16:49:32,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 16:49:32,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 16:49:32,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 16:49:32,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 16:49:32,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 16:49:32,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 16:49:32,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 16:49:32,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 16:49:32,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (1/1) ... [2021-08-21 16:49:32,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 16:49:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:32,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 16:49:33,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 16:49:33,032 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-21 16:49:33,032 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-21 16:49:33,033 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-21 16:49:33,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-21 16:49:33,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 16:49:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-21 16:49:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 16:49:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 16:49:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 16:49:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-21 16:49:33,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 16:49:33,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 16:49:33,035 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 16:49:33,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 16:49:33,461 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-21 16:49:33,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:49:33 BoogieIcfgContainer [2021-08-21 16:49:33,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 16:49:33,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 16:49:33,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 16:49:33,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 16:49:33,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:49:32" (1/3) ... [2021-08-21 16:49:33,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43283ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:49:33, skipping insertion in model container [2021-08-21 16:49:33,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:49:32" (2/3) ... [2021-08-21 16:49:33,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43283ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:49:33, skipping insertion in model container [2021-08-21 16:49:33,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:49:33" (3/3) ... [2021-08-21 16:49:33,473 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-08-21 16:49:33,478 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 16:49:33,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 16:49:33,479 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 16:49:33,479 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 16:49:33,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,514 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,514 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,514 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,515 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,515 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,516 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,516 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,517 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,517 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,518 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,518 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,519 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,519 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,520 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,521 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,521 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,521 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,522 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,522 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,522 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,522 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,522 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,522 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,523 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,524 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,524 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,524 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,524 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,524 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,526 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,526 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,530 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,530 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,531 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,531 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,537 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,537 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,538 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,538 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:49:33,541 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 16:49:33,590 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 16:49:33,597 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 [2021-08-21 16:49:33,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 16:49:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 16:49:33,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:33,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:33,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-08-21 16:49:33,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:33,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921583942] [2021-08-21 16:49:33,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:33,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:33,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:34,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:34,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921583942] [2021-08-21 16:49:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921583942] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:49:34,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:49:34,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 16:49:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586258313] [2021-08-21 16:49:34,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 16:49:34,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 16:49:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 16:49:34,147 INFO L87 Difference]: Start difference. First operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 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 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 16:49:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:34,270 INFO L93 Difference]: Finished difference Result 1582 states and 1828 transitions. [2021-08-21 16:49:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 16:49:34,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-08-21 16:49:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:34,286 INFO L225 Difference]: With dead ends: 1582 [2021-08-21 16:49:34,286 INFO L226 Difference]: Without dead ends: 554 [2021-08-21 16:49:34,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:49:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-21 16:49:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 315. [2021-08-21 16:49:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 305 states have (on average 1.3114754098360655) internal successors, (400), 314 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 400 transitions. [2021-08-21 16:49:34,347 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 400 transitions. Word has length 32 [2021-08-21 16:49:34,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:34,347 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 400 transitions. [2021-08-21 16:49:34,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-08-21 16:49:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 400 transitions. [2021-08-21 16:49:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 16:49:34,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:34,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:34,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 16:49:34,355 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:34,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:34,358 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-08-21 16:49:34,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:34,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284587601] [2021-08-21 16:49:34,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:34,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:34,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:34,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284587601] [2021-08-21 16:49:34,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284587601] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:49:34,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:49:34,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 16:49:34,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555741321] [2021-08-21 16:49:34,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 16:49:34,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 16:49:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 16:49:34,567 INFO L87 Difference]: Start difference. First operand 315 states and 400 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2021-08-21 16:49:34,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:34,652 INFO L93 Difference]: Finished difference Result 497 states and 634 transitions. [2021-08-21 16:49:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 16:49:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 36 [2021-08-21 16:49:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:34,656 INFO L225 Difference]: With dead ends: 497 [2021-08-21 16:49:34,656 INFO L226 Difference]: Without dead ends: 339 [2021-08-21 16:49:34,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:49:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-21 16:49:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 289. [2021-08-21 16:49:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.3451957295373667) internal successors, (378), 288 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 378 transitions. [2021-08-21 16:49:34,675 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 378 transitions. Word has length 36 [2021-08-21 16:49:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:34,676 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 378 transitions. [2021-08-21 16:49:34,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2021-08-21 16:49:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 378 transitions. [2021-08-21 16:49:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:49:34,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:34,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:34,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 16:49:34,677 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:34,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:34,678 INFO L82 PathProgramCache]: Analyzing trace with hash 10456968, now seen corresponding path program 1 times [2021-08-21 16:49:34,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:34,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97679264] [2021-08-21 16:49:34,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:34,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:34,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:34,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97679264] [2021-08-21 16:49:34,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97679264] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:49:34,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:49:34,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 16:49:34,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691988357] [2021-08-21 16:49:34,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 16:49:34,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 16:49:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 16:49:34,899 INFO L87 Difference]: Start difference. First operand 289 states and 378 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:35,079 INFO L93 Difference]: Finished difference Result 800 states and 1023 transitions. [2021-08-21 16:49:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 16:49:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-08-21 16:49:35,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:35,082 INFO L225 Difference]: With dead ends: 800 [2021-08-21 16:49:35,082 INFO L226 Difference]: Without dead ends: 613 [2021-08-21 16:49:35,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:49:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-21 16:49:35,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 310. [2021-08-21 16:49:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 302 states have (on average 1.3410596026490067) internal successors, (405), 309 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 405 transitions. [2021-08-21 16:49:35,101 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 405 transitions. Word has length 40 [2021-08-21 16:49:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:35,103 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 405 transitions. [2021-08-21 16:49:35,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,103 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 405 transitions. [2021-08-21 16:49:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:49:35,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:35,107 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:35,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 16:49:35,107 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1198227988, now seen corresponding path program 2 times [2021-08-21 16:49:35,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:35,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202923375] [2021-08-21 16:49:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:35,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:35,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:35,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202923375] [2021-08-21 16:49:35,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202923375] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:49:35,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:49:35,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:49:35,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805617032] [2021-08-21 16:49:35,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:49:35,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:49:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:49:35,250 INFO L87 Difference]: Start difference. First operand 310 states and 405 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:35,334 INFO L93 Difference]: Finished difference Result 531 states and 680 transitions. [2021-08-21 16:49:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 16:49:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-08-21 16:49:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:35,337 INFO L225 Difference]: With dead ends: 531 [2021-08-21 16:49:35,337 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 16:49:35,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:49:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 16:49:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 329. [2021-08-21 16:49:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 321 states have (on average 1.35202492211838) internal successors, (434), 328 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 434 transitions. [2021-08-21 16:49:35,353 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 434 transitions. Word has length 40 [2021-08-21 16:49:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:35,355 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 434 transitions. [2021-08-21 16:49:35,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 434 transitions. [2021-08-21 16:49:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:49:35,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:35,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:35,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 16:49:35,356 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 3 times [2021-08-21 16:49:35,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:35,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438209117] [2021-08-21 16:49:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:35,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:35,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:35,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438209117] [2021-08-21 16:49:35,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438209117] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:49:35,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:49:35,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:49:35,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112802060] [2021-08-21 16:49:35,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:49:35,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:49:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:49:35,477 INFO L87 Difference]: Start difference. First operand 329 states and 434 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:35,588 INFO L93 Difference]: Finished difference Result 1074 states and 1385 transitions. [2021-08-21 16:49:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:49:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-08-21 16:49:35,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:35,593 INFO L225 Difference]: With dead ends: 1074 [2021-08-21 16:49:35,593 INFO L226 Difference]: Without dead ends: 915 [2021-08-21 16:49:35,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:49:35,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-21 16:49:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 326. [2021-08-21 16:49:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.3773584905660377) internal successors, (438), 325 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 438 transitions. [2021-08-21 16:49:35,606 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 438 transitions. Word has length 40 [2021-08-21 16:49:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:35,607 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 438 transitions. [2021-08-21 16:49:35,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 438 transitions. [2021-08-21 16:49:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:49:35,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:35,607 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:35,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 16:49:35,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1960098348, now seen corresponding path program 4 times [2021-08-21 16:49:35,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:35,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274292103] [2021-08-21 16:49:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:35,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:35,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:35,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274292103] [2021-08-21 16:49:35,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274292103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:49:35,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:49:35,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:49:35,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069168559] [2021-08-21 16:49:35,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:49:35,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:49:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:49:35,710 INFO L87 Difference]: Start difference. First operand 326 states and 438 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:35,868 INFO L93 Difference]: Finished difference Result 555 states and 717 transitions. [2021-08-21 16:49:35,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 16:49:35,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-08-21 16:49:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:35,871 INFO L225 Difference]: With dead ends: 555 [2021-08-21 16:49:35,871 INFO L226 Difference]: Without dead ends: 432 [2021-08-21 16:49:35,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:49:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-21 16:49:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 324. [2021-08-21 16:49:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 316 states have (on average 1.3386075949367089) internal successors, (423), 323 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 423 transitions. [2021-08-21 16:49:35,879 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 423 transitions. Word has length 40 [2021-08-21 16:49:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 423 transitions. [2021-08-21 16:49:35,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 423 transitions. [2021-08-21 16:49:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:49:35,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:35,882 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:35,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 16:49:35,882 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:35,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1405973461, now seen corresponding path program 1 times [2021-08-21 16:49:35,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:35,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892265324] [2021-08-21 16:49:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:35,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:36,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:36,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892265324] [2021-08-21 16:49:36,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892265324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:36,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031112900] [2021-08-21 16:49:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:36,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:36,031 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:36,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 16:49:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:36,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:49:36,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:36,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031112900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:36,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:36,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 16:49:36,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440228355] [2021-08-21 16:49:36,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 16:49:36,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 16:49:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:49:36,443 INFO L87 Difference]: Start difference. First operand 324 states and 423 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:36,546 INFO L93 Difference]: Finished difference Result 596 states and 767 transitions. [2021-08-21 16:49:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:49:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-08-21 16:49:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:36,550 INFO L225 Difference]: With dead ends: 596 [2021-08-21 16:49:36,550 INFO L226 Difference]: Without dead ends: 446 [2021-08-21 16:49:36,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:49:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-21 16:49:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 343. [2021-08-21 16:49:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 335 states have (on average 1.346268656716418) internal successors, (451), 342 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 451 transitions. [2021-08-21 16:49:36,561 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 451 transitions. Word has length 45 [2021-08-21 16:49:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 451 transitions. [2021-08-21 16:49:36,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 451 transitions. [2021-08-21 16:49:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:49:36,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:36,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:36,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 16:49:36,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:36,785 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1975051127, now seen corresponding path program 2 times [2021-08-21 16:49:36,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:36,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512241135] [2021-08-21 16:49:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:36,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:36,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:36,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512241135] [2021-08-21 16:49:36,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512241135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872966542] [2021-08-21 16:49:36,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:49:36,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:36,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:36,885 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:36,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 16:49:37,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:49:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:49:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:37,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872966542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:37,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:37,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 16:49:37,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441025617] [2021-08-21 16:49:37,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 16:49:37,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 16:49:37,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:49:37,250 INFO L87 Difference]: Start difference. First operand 343 states and 451 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:37,396 INFO L93 Difference]: Finished difference Result 1180 states and 1517 transitions. [2021-08-21 16:49:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:49:37,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-08-21 16:49:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:37,400 INFO L225 Difference]: With dead ends: 1180 [2021-08-21 16:49:37,400 INFO L226 Difference]: Without dead ends: 1018 [2021-08-21 16:49:37,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:49:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-08-21 16:49:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 375. [2021-08-21 16:49:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 367 states have (on average 1.3841961852861036) internal successors, (508), 374 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:37,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 508 transitions. [2021-08-21 16:49:37,413 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 508 transitions. Word has length 45 [2021-08-21 16:49:37,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:37,414 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 508 transitions. [2021-08-21 16:49:37,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:37,414 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 508 transitions. [2021-08-21 16:49:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:49:37,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:37,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:37,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:37,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-21 16:49:37,633 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:37,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1931938267, now seen corresponding path program 3 times [2021-08-21 16:49:37,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:37,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427463341] [2021-08-21 16:49:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:37,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:37,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:37,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427463341] [2021-08-21 16:49:37,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427463341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:37,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369616674] [2021-08-21 16:49:37,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:49:37,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:37,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:37,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 16:49:37,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 16:49:37,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:49:37,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369616674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:38,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:38,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 16:49:38,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391216080] [2021-08-21 16:49:38,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 16:49:38,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 16:49:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:49:38,122 INFO L87 Difference]: Start difference. First operand 375 states and 508 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:38,404 INFO L93 Difference]: Finished difference Result 841 states and 1090 transitions. [2021-08-21 16:49:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:49:38,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 45 [2021-08-21 16:49:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:38,407 INFO L225 Difference]: With dead ends: 841 [2021-08-21 16:49:38,407 INFO L226 Difference]: Without dead ends: 638 [2021-08-21 16:49:38,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:49:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-21 16:49:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 388. [2021-08-21 16:49:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 380 states have (on average 1.3526315789473684) internal successors, (514), 387 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 514 transitions. [2021-08-21 16:49:38,417 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 514 transitions. Word has length 45 [2021-08-21 16:49:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:38,417 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 514 transitions. [2021-08-21 16:49:38,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 514 transitions. [2021-08-21 16:49:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 16:49:38,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:38,418 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:38,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:38,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:38,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:38,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:38,634 INFO L82 PathProgramCache]: Analyzing trace with hash -968639933, now seen corresponding path program 1 times [2021-08-21 16:49:38,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:38,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913411242] [2021-08-21 16:49:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:38,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:38,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:38,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913411242] [2021-08-21 16:49:38,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913411242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:38,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515394005] [2021-08-21 16:49:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:38,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:38,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:38,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:38,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 16:49:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:49:38,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515394005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:39,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:39,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-21 16:49:39,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665683321] [2021-08-21 16:49:39,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:49:39,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:39,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:49:39,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:49:39,301 INFO L87 Difference]: Start difference. First operand 388 states and 514 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:39,494 INFO L93 Difference]: Finished difference Result 962 states and 1231 transitions. [2021-08-21 16:49:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:49:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 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 50 [2021-08-21 16:49:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:39,497 INFO L225 Difference]: With dead ends: 962 [2021-08-21 16:49:39,498 INFO L226 Difference]: Without dead ends: 772 [2021-08-21 16:49:39,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:49:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-08-21 16:49:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 433. [2021-08-21 16:49:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 425 states have (on average 1.3623529411764705) internal successors, (579), 432 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 579 transitions. [2021-08-21 16:49:39,511 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 579 transitions. Word has length 50 [2021-08-21 16:49:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:39,511 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 579 transitions. [2021-08-21 16:49:39,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 579 transitions. [2021-08-21 16:49:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 16:49:39,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:39,513 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:39,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:39,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:39,736 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:39,737 INFO L82 PathProgramCache]: Analyzing trace with hash -150796887, now seen corresponding path program 2 times [2021-08-21 16:49:39,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:39,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107958307] [2021-08-21 16:49:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:39,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:39,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:39,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107958307] [2021-08-21 16:49:39,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107958307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:39,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724892204] [2021-08-21 16:49:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:49:39,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:39,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:39,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 16:49:40,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:49:40,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:40,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:49:40,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724892204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:40,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 16:49:40,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308798815] [2021-08-21 16:49:40,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 16:49:40,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 16:49:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:49:40,322 INFO L87 Difference]: Start difference. First operand 433 states and 579 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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) [2021-08-21 16:49:40,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:40,442 INFO L93 Difference]: Finished difference Result 919 states and 1177 transitions. [2021-08-21 16:49:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 16:49:40,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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 50 [2021-08-21 16:49:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:40,445 INFO L225 Difference]: With dead ends: 919 [2021-08-21 16:49:40,445 INFO L226 Difference]: Without dead ends: 769 [2021-08-21 16:49:40,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:49:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-21 16:49:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-08-21 16:49:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 420 states have (on average 1.3666666666666667) internal successors, (574), 427 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 574 transitions. [2021-08-21 16:49:40,456 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 574 transitions. Word has length 50 [2021-08-21 16:49:40,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 574 transitions. [2021-08-21 16:49:40,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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) [2021-08-21 16:49:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 574 transitions. [2021-08-21 16:49:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 16:49:40,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:40,457 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:40,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:40,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 16:49:40,678 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash -725629027, now seen corresponding path program 3 times [2021-08-21 16:49:40,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:40,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510159566] [2021-08-21 16:49:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:40,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:40,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:40,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510159566] [2021-08-21 16:49:40,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510159566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:40,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712592571] [2021-08-21 16:49:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:49:40,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:40,771 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:40,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 16:49:41,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 16:49:41,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:49:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:41,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712592571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:41,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:41,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 16:49:41,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022942314] [2021-08-21 16:49:41,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 16:49:41,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 16:49:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:49:41,233 INFO L87 Difference]: Start difference. First operand 428 states and 574 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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) [2021-08-21 16:49:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:41,394 INFO L93 Difference]: Finished difference Result 1381 states and 1761 transitions. [2021-08-21 16:49:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 16:49:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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 50 [2021-08-21 16:49:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:41,400 INFO L225 Difference]: With dead ends: 1381 [2021-08-21 16:49:41,400 INFO L226 Difference]: Without dead ends: 1219 [2021-08-21 16:49:41,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:49:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-08-21 16:49:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 436. [2021-08-21 16:49:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 428 states have (on average 1.3831775700934579) internal successors, (592), 435 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 592 transitions. [2021-08-21 16:49:41,415 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 592 transitions. Word has length 50 [2021-08-21 16:49:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:41,415 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 592 transitions. [2021-08-21 16:49:41,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 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) [2021-08-21 16:49:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 592 transitions. [2021-08-21 16:49:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 16:49:41,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:41,417 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:41,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:41,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:41,631 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash -682516167, now seen corresponding path program 4 times [2021-08-21 16:49:41,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:41,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835864034] [2021-08-21 16:49:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:41,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:41,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:41,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835864034] [2021-08-21 16:49:41,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835864034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:41,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646691059] [2021-08-21 16:49:41,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:49:41,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:41,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:41,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:41,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 16:49:41,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:49:41,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:49:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:42,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646691059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:42,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:42,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 16:49:42,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075425335] [2021-08-21 16:49:42,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 16:49:42,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 16:49:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:49:42,116 INFO L87 Difference]: Start difference. First operand 436 states and 592 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:42,351 INFO L93 Difference]: Finished difference Result 832 states and 1061 transitions. [2021-08-21 16:49:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:49:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 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 50 [2021-08-21 16:49:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:42,353 INFO L225 Difference]: With dead ends: 832 [2021-08-21 16:49:42,353 INFO L226 Difference]: Without dead ends: 709 [2021-08-21 16:49:42,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:49:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-21 16:49:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 427. [2021-08-21 16:49:42,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 419 states have (on average 1.3651551312649164) internal successors, (572), 426 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 572 transitions. [2021-08-21 16:49:42,363 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 572 transitions. Word has length 50 [2021-08-21 16:49:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:42,363 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 572 transitions. [2021-08-21 16:49:42,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 572 transitions. [2021-08-21 16:49:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:49:42,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:42,364 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:42,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:42,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:42,588 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1367396072, now seen corresponding path program 5 times [2021-08-21 16:49:42,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:42,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743806680] [2021-08-21 16:49:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:42,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:42,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:42,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743806680] [2021-08-21 16:49:42,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743806680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:42,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900195732] [2021-08-21 16:49:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:49:42,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:42,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:42,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 16:49:42,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:49:42,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:49:42,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:43,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900195732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:43,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:43,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 16:49:43,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813179475] [2021-08-21 16:49:43,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:49:43,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:49:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:49:43,214 INFO L87 Difference]: Start difference. First operand 427 states and 572 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:43,396 INFO L93 Difference]: Finished difference Result 893 states and 1141 transitions. [2021-08-21 16:49:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:49:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 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 55 [2021-08-21 16:49:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:43,399 INFO L225 Difference]: With dead ends: 893 [2021-08-21 16:49:43,399 INFO L226 Difference]: Without dead ends: 743 [2021-08-21 16:49:43,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:49:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-08-21 16:49:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 432. [2021-08-21 16:49:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 424 states have (on average 1.365566037735849) internal successors, (579), 431 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 579 transitions. [2021-08-21 16:49:43,409 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 579 transitions. Word has length 55 [2021-08-21 16:49:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:43,409 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 579 transitions. [2021-08-21 16:49:43,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 579 transitions. [2021-08-21 16:49:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:49:43,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:43,410 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:43,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:43,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 16:49:43,625 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:43,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1088516634, now seen corresponding path program 6 times [2021-08-21 16:49:43,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:43,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755121421] [2021-08-21 16:49:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:43,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:43,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:43,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755121421] [2021-08-21 16:49:43,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755121421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:43,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282867915] [2021-08-21 16:49:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:49:43,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:43,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:43,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 16:49:44,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 16:49:44,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:49:44,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:44,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282867915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:44,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:44,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 16:49:44,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001766670] [2021-08-21 16:49:44,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:49:44,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:49:44,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:49:44,223 INFO L87 Difference]: Start difference. First operand 432 states and 579 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:44,459 INFO L93 Difference]: Finished difference Result 1415 states and 1811 transitions. [2021-08-21 16:49:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:49:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 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 55 [2021-08-21 16:49:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:44,463 INFO L225 Difference]: With dead ends: 1415 [2021-08-21 16:49:44,463 INFO L226 Difference]: Without dead ends: 1253 [2021-08-21 16:49:44,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:49:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-08-21 16:49:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 465. [2021-08-21 16:49:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 457 states have (on average 1.3829321663019694) internal successors, (632), 464 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 632 transitions. [2021-08-21 16:49:44,478 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 632 transitions. Word has length 55 [2021-08-21 16:49:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:44,479 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 632 transitions. [2021-08-21 16:49:44,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 632 transitions. [2021-08-21 16:49:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:49:44,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:44,484 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:44,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:44,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 16:49:44,689 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1131629494, now seen corresponding path program 7 times [2021-08-21 16:49:44,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:44,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047016751] [2021-08-21 16:49:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:44,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:44,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:44,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047016751] [2021-08-21 16:49:44,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047016751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:44,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740462045] [2021-08-21 16:49:44,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:49:44,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:44,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:44,806 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:44,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 16:49:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:49:45,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:45,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740462045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:45,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:45,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-21 16:49:45,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621768693] [2021-08-21 16:49:45,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:49:45,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:45,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:49:45,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:49:45,342 INFO L87 Difference]: Start difference. First operand 465 states and 632 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:45,728 INFO L93 Difference]: Finished difference Result 1101 states and 1410 transitions. [2021-08-21 16:49:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:49:45,728 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 55 [2021-08-21 16:49:45,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:45,731 INFO L225 Difference]: With dead ends: 1101 [2021-08-21 16:49:45,731 INFO L226 Difference]: Without dead ends: 898 [2021-08-21 16:49:45,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-21 16:49:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-08-21 16:49:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 478. [2021-08-21 16:49:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 470 states have (on average 1.3574468085106384) internal successors, (638), 477 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:45,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 638 transitions. [2021-08-21 16:49:45,742 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 638 transitions. Word has length 55 [2021-08-21 16:49:45,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:45,743 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 638 transitions. [2021-08-21 16:49:45,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:45,743 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 638 transitions. [2021-08-21 16:49:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 16:49:45,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:45,744 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:45,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:45,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 16:49:45,969 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:45,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1891275182, now seen corresponding path program 8 times [2021-08-21 16:49:45,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:45,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699720670] [2021-08-21 16:49:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:45,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:46,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:46,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699720670] [2021-08-21 16:49:46,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699720670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:46,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671860972] [2021-08-21 16:49:46,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:49:46,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:46,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:46,111 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:46,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 16:49:46,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:49:46,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:49:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:46,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671860972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:46,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:46,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-21 16:49:46,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778107029] [2021-08-21 16:49:46,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:49:46,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:46,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:49:46,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:49:46,841 INFO L87 Difference]: Start difference. First operand 478 states and 638 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:47,082 INFO L93 Difference]: Finished difference Result 1102 states and 1415 transitions. [2021-08-21 16:49:47,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:49:47,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 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 60 [2021-08-21 16:49:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:47,086 INFO L225 Difference]: With dead ends: 1102 [2021-08-21 16:49:47,086 INFO L226 Difference]: Without dead ends: 912 [2021-08-21 16:49:47,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-08-21 16:49:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-21 16:49:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 523. [2021-08-21 16:49:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 515 states have (on average 1.3650485436893205) internal successors, (703), 522 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 703 transitions. [2021-08-21 16:49:47,099 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 703 transitions. Word has length 60 [2021-08-21 16:49:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:47,100 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 703 transitions. [2021-08-21 16:49:47,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 703 transitions. [2021-08-21 16:49:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 16:49:47,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:47,101 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:47,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:47,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 16:49:47,321 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:47,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:47,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1891775032, now seen corresponding path program 9 times [2021-08-21 16:49:47,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:47,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983567267] [2021-08-21 16:49:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:47,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:47,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:47,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983567267] [2021-08-21 16:49:47,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983567267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:47,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583623585] [2021-08-21 16:49:47,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:49:47,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:47,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:47,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 16:49:47,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 16:49:47,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:49:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:48,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583623585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:48,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:48,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 16:49:48,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107796388] [2021-08-21 16:49:48,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:49:48,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:49:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:49:48,167 INFO L87 Difference]: Start difference. First operand 523 states and 703 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:48,337 INFO L93 Difference]: Finished difference Result 1159 states and 1481 transitions. [2021-08-21 16:49:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:49:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 16:49:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:48,341 INFO L225 Difference]: With dead ends: 1159 [2021-08-21 16:49:48,341 INFO L226 Difference]: Without dead ends: 1009 [2021-08-21 16:49:48,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:49:48,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-21 16:49:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 518. [2021-08-21 16:49:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 510 states have (on average 1.3686274509803922) internal successors, (698), 517 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 698 transitions. [2021-08-21 16:49:48,352 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 698 transitions. Word has length 60 [2021-08-21 16:49:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:48,352 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 698 transitions. [2021-08-21 16:49:48,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 698 transitions. [2021-08-21 16:49:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 16:49:48,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:48,354 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:48,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:48,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 16:49:48,577 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1472457940, now seen corresponding path program 10 times [2021-08-21 16:49:48,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:48,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714691911] [2021-08-21 16:49:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:48,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:48,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714691911] [2021-08-21 16:49:48,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714691911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411527147] [2021-08-21 16:49:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:49:48,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:48,687 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:48,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 16:49:49,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:49:49,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:49:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:49,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411527147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:49,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:49,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 16:49:49,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385026121] [2021-08-21 16:49:49,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:49:49,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:49,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:49:49,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:49:49,392 INFO L87 Difference]: Start difference. First operand 518 states and 698 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:49,571 INFO L93 Difference]: Finished difference Result 1124 states and 1426 transitions. [2021-08-21 16:49:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:49:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 16:49:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:49,575 INFO L225 Difference]: With dead ends: 1124 [2021-08-21 16:49:49,575 INFO L226 Difference]: Without dead ends: 974 [2021-08-21 16:49:49,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:49:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-08-21 16:49:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 518. [2021-08-21 16:49:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 510 states have (on average 1.3686274509803922) internal successors, (698), 517 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 698 transitions. [2021-08-21 16:49:49,586 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 698 transitions. Word has length 60 [2021-08-21 16:49:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:49,586 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 698 transitions. [2021-08-21 16:49:49,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 698 transitions. [2021-08-21 16:49:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 16:49:49,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:49,588 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:49,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:49,812 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash 983454766, now seen corresponding path program 11 times [2021-08-21 16:49:49,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:49,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972817708] [2021-08-21 16:49:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:49,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:49,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:49,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972817708] [2021-08-21 16:49:49,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972817708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:49,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625849683] [2021-08-21 16:49:49,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:49:49,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:49,919 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 16:49:50,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:49:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:49:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:50,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625849683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:50,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:50,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 16:49:50,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432159643] [2021-08-21 16:49:50,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:49:50,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:50,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:49:50,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:49:50,568 INFO L87 Difference]: Start difference. First operand 518 states and 698 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:50,778 INFO L93 Difference]: Finished difference Result 1581 states and 2005 transitions. [2021-08-21 16:49:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:49:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-21 16:49:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:50,782 INFO L225 Difference]: With dead ends: 1581 [2021-08-21 16:49:50,782 INFO L226 Difference]: Without dead ends: 1419 [2021-08-21 16:49:50,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:49:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-08-21 16:49:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 526. [2021-08-21 16:49:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 518 states have (on average 1.3822393822393821) internal successors, (716), 525 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 716 transitions. [2021-08-21 16:49:50,794 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 716 transitions. Word has length 60 [2021-08-21 16:49:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:50,794 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 716 transitions. [2021-08-21 16:49:50,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 716 transitions. [2021-08-21 16:49:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 16:49:50,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:50,796 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:50,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:51,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:51,009 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:51,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1026567626, now seen corresponding path program 12 times [2021-08-21 16:49:51,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:51,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344534630] [2021-08-21 16:49:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:51,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:51,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:51,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344534630] [2021-08-21 16:49:51,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344534630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:51,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135663666] [2021-08-21 16:49:51,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:49:51,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:51,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:51,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 16:49:51,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 16:49:51,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:51,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:49:51,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:51,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135663666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:51,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:51,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-21 16:49:51,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998220426] [2021-08-21 16:49:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:49:51,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:49:51,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:49:51,768 INFO L87 Difference]: Start difference. First operand 526 states and 716 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:52,159 INFO L93 Difference]: Finished difference Result 1208 states and 1545 transitions. [2021-08-21 16:49:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:49:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 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 60 [2021-08-21 16:49:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:52,162 INFO L225 Difference]: With dead ends: 1208 [2021-08-21 16:49:52,162 INFO L226 Difference]: Without dead ends: 1005 [2021-08-21 16:49:52,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:49:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-08-21 16:49:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 483. [2021-08-21 16:49:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 475 states have (on average 1.36) internal successors, (646), 482 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 646 transitions. [2021-08-21 16:49:52,172 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 646 transitions. Word has length 60 [2021-08-21 16:49:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:52,172 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 646 transitions. [2021-08-21 16:49:52,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 646 transitions. [2021-08-21 16:49:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:49:52,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:52,173 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:52,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:52,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:52,398 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:52,398 INFO L82 PathProgramCache]: Analyzing trace with hash -160555289, now seen corresponding path program 13 times [2021-08-21 16:49:52,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:52,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800711822] [2021-08-21 16:49:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:52,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:52,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:52,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800711822] [2021-08-21 16:49:52,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800711822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:52,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976410680] [2021-08-21 16:49:52,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:49:52,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:52,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:52,530 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:52,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 16:49:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:52,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:49:52,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:53,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976410680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:53,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:53,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:49:53,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736154928] [2021-08-21 16:49:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:49:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:49:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:49:53,318 INFO L87 Difference]: Start difference. First operand 483 states and 646 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:53,493 INFO L93 Difference]: Finished difference Result 1049 states and 1335 transitions. [2021-08-21 16:49:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:49:53,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-08-21 16:49:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:53,498 INFO L225 Difference]: With dead ends: 1049 [2021-08-21 16:49:53,498 INFO L226 Difference]: Without dead ends: 899 [2021-08-21 16:49:53,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:49:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-08-21 16:49:53,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 488. [2021-08-21 16:49:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 480 states have (on average 1.3604166666666666) internal successors, (653), 487 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 653 transitions. [2021-08-21 16:49:53,506 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 653 transitions. Word has length 65 [2021-08-21 16:49:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:53,506 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 653 transitions. [2021-08-21 16:49:53,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 653 transitions. [2021-08-21 16:49:53,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:49:53,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:53,508 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:53,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:53,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 16:49:53,717 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1317239447, now seen corresponding path program 14 times [2021-08-21 16:49:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:53,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200762140] [2021-08-21 16:49:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:53,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:53,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:53,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200762140] [2021-08-21 16:49:53,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200762140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:53,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423773754] [2021-08-21 16:49:53,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:49:53,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:53,829 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:53,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 16:49:54,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:49:54,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:49:54,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:54,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423773754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:54,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:54,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:49:54,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728167757] [2021-08-21 16:49:54,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:49:54,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:49:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:49:54,615 INFO L87 Difference]: Start difference. First operand 488 states and 653 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:54,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:54,836 INFO L93 Difference]: Finished difference Result 1174 states and 1487 transitions. [2021-08-21 16:49:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:49:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-08-21 16:49:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:54,845 INFO L225 Difference]: With dead ends: 1174 [2021-08-21 16:49:54,845 INFO L226 Difference]: Without dead ends: 1024 [2021-08-21 16:49:54,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:49:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-08-21 16:49:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 518. [2021-08-21 16:49:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 510 states have (on average 1.3627450980392157) internal successors, (695), 517 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 695 transitions. [2021-08-21 16:49:54,855 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 695 transitions. Word has length 65 [2021-08-21 16:49:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:54,855 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 695 transitions. [2021-08-21 16:49:54,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 695 transitions. [2021-08-21 16:49:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:49:54,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:54,856 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:54,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:55,077 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673259, now seen corresponding path program 15 times [2021-08-21 16:49:55,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:55,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824678011] [2021-08-21 16:49:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:55,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:55,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:55,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824678011] [2021-08-21 16:49:55,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824678011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:55,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249739681] [2021-08-21 16:49:55,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:49:55,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:55,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:55,186 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:55,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 16:49:55,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:49:55,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:49:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:56,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249739681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:56,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:56,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:49:56,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989500365] [2021-08-21 16:49:56,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:49:56,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:49:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:49:56,059 INFO L87 Difference]: Start difference. First operand 518 states and 695 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:56,330 INFO L93 Difference]: Finished difference Result 1660 states and 2122 transitions. [2021-08-21 16:49:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:49:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-08-21 16:49:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:56,333 INFO L225 Difference]: With dead ends: 1660 [2021-08-21 16:49:56,333 INFO L226 Difference]: Without dead ends: 1455 [2021-08-21 16:49:56,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:49:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-21 16:49:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 551. [2021-08-21 16:49:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 543 states have (on average 1.3775322283609577) internal successors, (748), 550 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:56,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 748 transitions. [2021-08-21 16:49:56,345 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 748 transitions. Word has length 65 [2021-08-21 16:49:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:56,345 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 748 transitions. [2021-08-21 16:49:56,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 748 transitions. [2021-08-21 16:49:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:49:56,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:56,347 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:56,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:56,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:56,561 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1181786119, now seen corresponding path program 16 times [2021-08-21 16:49:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:56,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118986542] [2021-08-21 16:49:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:56,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:56,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:56,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118986542] [2021-08-21 16:49:56,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118986542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:56,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834310005] [2021-08-21 16:49:56,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:49:56,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:56,689 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:56,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 16:49:57,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:49:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:49:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:57,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834310005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:57,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:57,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-21 16:49:57,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340761412] [2021-08-21 16:49:57,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:49:57,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:57,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:49:57,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:49:57,565 INFO L87 Difference]: Start difference. First operand 551 states and 748 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:57,938 INFO L93 Difference]: Finished difference Result 1297 states and 1646 transitions. [2021-08-21 16:49:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:49:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 65 [2021-08-21 16:49:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:57,941 INFO L225 Difference]: With dead ends: 1297 [2021-08-21 16:49:57,941 INFO L226 Difference]: Without dead ends: 1094 [2021-08-21 16:49:57,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:49:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-08-21 16:49:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 478. [2021-08-21 16:49:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 470 states have (on average 1.353191489361702) internal successors, (636), 477 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 636 transitions. [2021-08-21 16:49:57,951 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 636 transitions. Word has length 65 [2021-08-21 16:49:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:57,951 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 636 transitions. [2021-08-21 16:49:57,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 636 transitions. [2021-08-21 16:49:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 16:49:57,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:57,952 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:57,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 16:49:58,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:58,171 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1377606561, now seen corresponding path program 17 times [2021-08-21 16:49:58,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:58,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971833962] [2021-08-21 16:49:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:58,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:49:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:58,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:49:58,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971833962] [2021-08-21 16:49:58,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971833962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:58,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713025786] [2021-08-21 16:49:58,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:49:58,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:49:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:49:58,325 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:49:58,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 16:49:58,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:49:58,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:49:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:49:58,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:49:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:49:59,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713025786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:49:59,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:49:59,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-08-21 16:49:59,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424374672] [2021-08-21 16:49:59,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:49:59,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:49:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:49:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:49:59,434 INFO L87 Difference]: Start difference. First operand 478 states and 636 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:49:59,661 INFO L93 Difference]: Finished difference Result 1142 states and 1463 transitions. [2021-08-21 16:49:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:49:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 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 70 [2021-08-21 16:49:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:49:59,664 INFO L225 Difference]: With dead ends: 1142 [2021-08-21 16:49:59,664 INFO L226 Difference]: Without dead ends: 952 [2021-08-21 16:49:59,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:49:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-08-21 16:49:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 523. [2021-08-21 16:49:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 515 states have (on average 1.3611650485436892) internal successors, (701), 522 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 701 transitions. [2021-08-21 16:49:59,674 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 701 transitions. Word has length 70 [2021-08-21 16:49:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:49:59,674 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 701 transitions. [2021-08-21 16:49:59,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:49:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 701 transitions. [2021-08-21 16:49:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 16:49:59,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:49:59,675 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:49:59,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 16:49:59,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 16:49:59,889 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:49:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:49:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2110113785, now seen corresponding path program 18 times [2021-08-21 16:49:59,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:49:59,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926101736] [2021-08-21 16:49:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:49:59,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:49:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:00,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:00,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926101736] [2021-08-21 16:50:00,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926101736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:00,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590302259] [2021-08-21 16:50:00,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:50:00,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:00,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:00,027 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:00,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 16:50:00,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:50:00,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:00,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:50:00,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:01,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590302259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:01,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:01,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 16:50:01,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384087399] [2021-08-21 16:50:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:01,005 INFO L87 Difference]: Start difference. First operand 523 states and 701 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:01,172 INFO L93 Difference]: Finished difference Result 1334 states and 1690 transitions. [2021-08-21 16:50:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:50:01,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 70 [2021-08-21 16:50:01,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:01,175 INFO L225 Difference]: With dead ends: 1334 [2021-08-21 16:50:01,175 INFO L226 Difference]: Without dead ends: 1184 [2021-08-21 16:50:01,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:50:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-08-21 16:50:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 523. [2021-08-21 16:50:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 515 states have (on average 1.3650485436893205) internal successors, (703), 522 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 703 transitions. [2021-08-21 16:50:01,184 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 703 transitions. Word has length 70 [2021-08-21 16:50:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:01,184 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 703 transitions. [2021-08-21 16:50:01,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 703 transitions. [2021-08-21 16:50:01,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 16:50:01,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:01,185 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:01,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 16:50:01,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 16:50:01,388 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2094430203, now seen corresponding path program 19 times [2021-08-21 16:50:01,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:01,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018889311] [2021-08-21 16:50:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:01,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:01,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:01,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018889311] [2021-08-21 16:50:01,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018889311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:01,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312068545] [2021-08-21 16:50:01,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:50:01,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:01,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:01,505 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:01,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 16:50:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:02,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:50:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:02,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312068545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:02,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:02,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 16:50:02,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187789563] [2021-08-21 16:50:02,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:02,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:02,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:02,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:02,560 INFO L87 Difference]: Start difference. First operand 523 states and 703 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:02,822 INFO L93 Difference]: Finished difference Result 1329 states and 1677 transitions. [2021-08-21 16:50:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:50:02,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 70 [2021-08-21 16:50:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:02,825 INFO L225 Difference]: With dead ends: 1329 [2021-08-21 16:50:02,826 INFO L226 Difference]: Without dead ends: 1179 [2021-08-21 16:50:02,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:50:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-08-21 16:50:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 553. [2021-08-21 16:50:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 545 states have (on average 1.3669724770642202) internal successors, (745), 552 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 745 transitions. [2021-08-21 16:50:02,836 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 745 transitions. Word has length 70 [2021-08-21 16:50:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:02,836 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 745 transitions. [2021-08-21 16:50:02,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 745 transitions. [2021-08-21 16:50:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 16:50:02,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:02,838 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:02,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:03,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 16:50:03,057 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash 937746045, now seen corresponding path program 20 times [2021-08-21 16:50:03,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:03,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001232165] [2021-08-21 16:50:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:03,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:03,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001232165] [2021-08-21 16:50:03,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001232165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:03,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310114033] [2021-08-21 16:50:03,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:50:03,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:03,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:03,185 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:03,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 16:50:03,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:50:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:03,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:50:03,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:04,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310114033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:04,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:04,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 16:50:04,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176797421] [2021-08-21 16:50:04,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:04,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:04,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:04,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:04,187 INFO L87 Difference]: Start difference. First operand 553 states and 745 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:04,421 INFO L93 Difference]: Finished difference Result 1319 states and 1659 transitions. [2021-08-21 16:50:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:50:04,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 70 [2021-08-21 16:50:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:04,435 INFO L225 Difference]: With dead ends: 1319 [2021-08-21 16:50:04,435 INFO L226 Difference]: Without dead ends: 1169 [2021-08-21 16:50:04,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-21 16:50:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-08-21 16:50:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 583. [2021-08-21 16:50:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 575 states have (on average 1.368695652173913) internal successors, (787), 582 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 787 transitions. [2021-08-21 16:50:04,480 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 787 transitions. Word has length 70 [2021-08-21 16:50:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:04,480 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 787 transitions. [2021-08-21 16:50:04,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 787 transitions. [2021-08-21 16:50:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 16:50:04,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:04,481 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:04,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:04,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:04,698 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash -901308545, now seen corresponding path program 21 times [2021-08-21 16:50:04,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:04,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912265165] [2021-08-21 16:50:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:04,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:04,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:04,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912265165] [2021-08-21 16:50:04,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912265165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:04,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665856434] [2021-08-21 16:50:04,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:50:04,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:04,806 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:04,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 16:50:05,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:50:05,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:05,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:50:05,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:05,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665856434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:05,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:05,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-21 16:50:05,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138472042] [2021-08-21 16:50:05,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:05,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:05,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:05,794 INFO L87 Difference]: Start difference. First operand 583 states and 787 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:06,070 INFO L93 Difference]: Finished difference Result 1830 states and 2324 transitions. [2021-08-21 16:50:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:50:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 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 70 [2021-08-21 16:50:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:06,074 INFO L225 Difference]: With dead ends: 1830 [2021-08-21 16:50:06,074 INFO L226 Difference]: Without dead ends: 1625 [2021-08-21 16:50:06,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-08-21 16:50:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-08-21 16:50:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 616. [2021-08-21 16:50:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 608 states have (on average 1.381578947368421) internal successors, (840), 615 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 840 transitions. [2021-08-21 16:50:06,085 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 840 transitions. Word has length 70 [2021-08-21 16:50:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:06,085 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 840 transitions. [2021-08-21 16:50:06,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 840 transitions. [2021-08-21 16:50:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 16:50:06,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:06,087 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:06,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:06,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:06,301 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash -858195685, now seen corresponding path program 22 times [2021-08-21 16:50:06,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:06,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869610213] [2021-08-21 16:50:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:06,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:06,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:06,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869610213] [2021-08-21 16:50:06,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869610213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:06,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715648787] [2021-08-21 16:50:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:50:06,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:06,417 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:06,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 16:50:07,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:50:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:50:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:07,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715648787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:07,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:07,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-21 16:50:07,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160080279] [2021-08-21 16:50:07,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:50:07,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:50:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:50:07,478 INFO L87 Difference]: Start difference. First operand 616 states and 840 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:07,901 INFO L93 Difference]: Finished difference Result 1408 states and 1789 transitions. [2021-08-21 16:50:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:50:07,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 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 70 [2021-08-21 16:50:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:07,909 INFO L225 Difference]: With dead ends: 1408 [2021-08-21 16:50:07,909 INFO L226 Difference]: Without dead ends: 1205 [2021-08-21 16:50:07,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 16:50:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-08-21 16:50:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 543. [2021-08-21 16:50:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 535 states have (on average 1.360747663551402) internal successors, (728), 542 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 728 transitions. [2021-08-21 16:50:07,920 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 728 transitions. Word has length 70 [2021-08-21 16:50:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:07,921 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 728 transitions. [2021-08-21 16:50:07,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 728 transitions. [2021-08-21 16:50:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:50:07,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:07,922 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:07,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 16:50:08,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-21 16:50:08,145 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -884648458, now seen corresponding path program 23 times [2021-08-21 16:50:08,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:08,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309303693] [2021-08-21 16:50:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:08,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:08,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:08,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309303693] [2021-08-21 16:50:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309303693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:08,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184360952] [2021-08-21 16:50:08,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:50:08,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:08,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:08,297 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:08,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 16:50:09,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:50:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:50:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:09,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184360952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:09,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:09,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:50:09,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238173147] [2021-08-21 16:50:09,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:09,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:09,424 INFO L87 Difference]: Start difference. First operand 543 states and 728 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:09,647 INFO L93 Difference]: Finished difference Result 1209 states and 1537 transitions. [2021-08-21 16:50:09,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:50:09,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-08-21 16:50:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:09,650 INFO L225 Difference]: With dead ends: 1209 [2021-08-21 16:50:09,650 INFO L226 Difference]: Without dead ends: 1059 [2021-08-21 16:50:09,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:50:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-08-21 16:50:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 548. [2021-08-21 16:50:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 540 states have (on average 1.3611111111111112) internal successors, (735), 547 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 735 transitions. [2021-08-21 16:50:09,657 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 735 transitions. Word has length 75 [2021-08-21 16:50:09,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:09,658 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 735 transitions. [2021-08-21 16:50:09,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:09,658 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 735 transitions. [2021-08-21 16:50:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:50:09,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:09,659 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:09,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:09,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 16:50:09,872 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1211040248, now seen corresponding path program 24 times [2021-08-21 16:50:09,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:09,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605310551] [2021-08-21 16:50:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:09,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:10,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:10,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605310551] [2021-08-21 16:50:10,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605310551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:10,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062772825] [2021-08-21 16:50:10,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:50:10,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:10,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:10,014 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:10,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 16:50:10,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:50:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:10,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:50:10,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:11,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062772825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:11,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:11,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:50:11,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33450325] [2021-08-21 16:50:11,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:11,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:11,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:11,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:11,163 INFO L87 Difference]: Start difference. First operand 548 states and 735 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:11,420 INFO L93 Difference]: Finished difference Result 1384 states and 1749 transitions. [2021-08-21 16:50:11,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:50:11,421 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-08-21 16:50:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:11,423 INFO L225 Difference]: With dead ends: 1384 [2021-08-21 16:50:11,423 INFO L226 Difference]: Without dead ends: 1234 [2021-08-21 16:50:11,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:50:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-08-21 16:50:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 578. [2021-08-21 16:50:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 570 states have (on average 1.3631578947368421) internal successors, (777), 577 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 777 transitions. [2021-08-21 16:50:11,450 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 777 transitions. Word has length 75 [2021-08-21 16:50:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:11,451 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 777 transitions. [2021-08-21 16:50:11,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 777 transitions. [2021-08-21 16:50:11,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:50:11,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:11,452 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:11,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:11,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:11,668 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:11,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash 54356090, now seen corresponding path program 25 times [2021-08-21 16:50:11,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:11,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71505653] [2021-08-21 16:50:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:11,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:11,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:11,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71505653] [2021-08-21 16:50:11,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71505653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:11,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813446213] [2021-08-21 16:50:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:50:11,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:11,790 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:11,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 16:50:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:12,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:50:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:12,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813446213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:12,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:12,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:50:12,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057142690] [2021-08-21 16:50:12,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:12,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:12,920 INFO L87 Difference]: Start difference. First operand 578 states and 777 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:13,183 INFO L93 Difference]: Finished difference Result 1374 states and 1731 transitions. [2021-08-21 16:50:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:50:13,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-08-21 16:50:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:13,185 INFO L225 Difference]: With dead ends: 1374 [2021-08-21 16:50:13,185 INFO L226 Difference]: Without dead ends: 1224 [2021-08-21 16:50:13,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:50:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-08-21 16:50:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 608. [2021-08-21 16:50:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 600 states have (on average 1.365) internal successors, (819), 607 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 819 transitions. [2021-08-21 16:50:13,194 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 819 transitions. Word has length 75 [2021-08-21 16:50:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 819 transitions. [2021-08-21 16:50:13,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 819 transitions. [2021-08-21 16:50:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:50:13,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:13,196 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:13,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:13,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:13,417 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:13,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1784698500, now seen corresponding path program 26 times [2021-08-21 16:50:13,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:13,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752079130] [2021-08-21 16:50:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:13,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:13,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:13,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752079130] [2021-08-21 16:50:13,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752079130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:13,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106939603] [2021-08-21 16:50:13,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:50:13,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:13,584 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:13,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 16:50:14,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:50:14,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:50:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:14,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106939603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:14,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:14,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:50:14,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055879564] [2021-08-21 16:50:14,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:50:14,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:14,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:50:14,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:50:14,743 INFO L87 Difference]: Start difference. First operand 608 states and 819 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:15,102 INFO L93 Difference]: Finished difference Result 1860 states and 2366 transitions. [2021-08-21 16:50:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:50:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-08-21 16:50:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:15,106 INFO L225 Difference]: With dead ends: 1860 [2021-08-21 16:50:15,106 INFO L226 Difference]: Without dead ends: 1655 [2021-08-21 16:50:15,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:50:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-08-21 16:50:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 641. [2021-08-21 16:50:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 633 states have (on average 1.377567140600316) internal successors, (872), 640 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 872 transitions. [2021-08-21 16:50:15,118 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 872 transitions. Word has length 75 [2021-08-21 16:50:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:15,118 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 872 transitions. [2021-08-21 16:50:15,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 872 transitions. [2021-08-21 16:50:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:50:15,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:15,119 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:15,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:15,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:15,319 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1741585640, now seen corresponding path program 27 times [2021-08-21 16:50:15,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:15,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803178536] [2021-08-21 16:50:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:15,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:15,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:15,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803178536] [2021-08-21 16:50:15,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803178536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:15,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475283696] [2021-08-21 16:50:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:50:15,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:15,457 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:15,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 16:50:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:50:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:50:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:16,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475283696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:16,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:16,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 16:50:16,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35284969] [2021-08-21 16:50:16,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:50:16,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:16,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:50:16,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:50:16,655 INFO L87 Difference]: Start difference. First operand 641 states and 872 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:17,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:17,039 INFO L93 Difference]: Finished difference Result 1277 states and 1601 transitions. [2021-08-21 16:50:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:50:17,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-08-21 16:50:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:17,041 INFO L225 Difference]: With dead ends: 1277 [2021-08-21 16:50:17,041 INFO L226 Difference]: Without dead ends: 1154 [2021-08-21 16:50:17,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:50:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-08-21 16:50:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 658. [2021-08-21 16:50:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 650 states have (on average 1.363076923076923) internal successors, (886), 657 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 886 transitions. [2021-08-21 16:50:17,050 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 886 transitions. Word has length 75 [2021-08-21 16:50:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:17,050 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 886 transitions. [2021-08-21 16:50:17,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 886 transitions. [2021-08-21 16:50:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:17,051 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:17,051 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:17,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:17,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 16:50:17,265 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -634211792, now seen corresponding path program 28 times [2021-08-21 16:50:17,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:17,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456773188] [2021-08-21 16:50:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:17,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:17,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:17,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456773188] [2021-08-21 16:50:17,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456773188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:17,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595999355] [2021-08-21 16:50:17,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:50:17,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:17,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:17,450 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:17,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 16:50:18,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:50:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595999355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:18,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:18,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-21 16:50:18,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080752718] [2021-08-21 16:50:18,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:50:18,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:50:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:50:18,874 INFO L87 Difference]: Start difference. First operand 658 states and 886 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:19,149 INFO L93 Difference]: Finished difference Result 1382 states and 1783 transitions. [2021-08-21 16:50:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 16:50:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:19,153 INFO L225 Difference]: With dead ends: 1382 [2021-08-21 16:50:19,153 INFO L226 Difference]: Without dead ends: 1192 [2021-08-21 16:50:19,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:50:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-08-21 16:50:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 703. [2021-08-21 16:50:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 695 states have (on average 1.3683453237410073) internal successors, (951), 702 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:19,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 951 transitions. [2021-08-21 16:50:19,163 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 951 transitions. Word has length 80 [2021-08-21 16:50:19,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:19,163 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 951 transitions. [2021-08-21 16:50:19,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 19 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:19,163 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 951 transitions. [2021-08-21 16:50:19,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:19,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:19,165 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:19,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:19,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 16:50:19,369 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -98793706, now seen corresponding path program 29 times [2021-08-21 16:50:19,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:19,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081633203] [2021-08-21 16:50:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:19,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:19,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081633203] [2021-08-21 16:50:19,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081633203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011531223] [2021-08-21 16:50:19,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:50:19,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:19,530 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:19,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 16:50:20,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:50:20,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:20,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:50:20,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:20,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011531223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:20,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:20,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 16:50:20,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126807552] [2021-08-21 16:50:20,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:50:20,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:50:20,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:50:20,947 INFO L87 Difference]: Start difference. First operand 703 states and 951 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:21,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:21,143 INFO L93 Difference]: Finished difference Result 1639 states and 2089 transitions. [2021-08-21 16:50:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:50:21,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:21,145 INFO L225 Difference]: With dead ends: 1639 [2021-08-21 16:50:21,145 INFO L226 Difference]: Without dead ends: 1489 [2021-08-21 16:50:21,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-08-21 16:50:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-08-21 16:50:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 698. [2021-08-21 16:50:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 690 states have (on average 1.3710144927536232) internal successors, (946), 697 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 946 transitions. [2021-08-21 16:50:21,155 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 946 transitions. Word has length 80 [2021-08-21 16:50:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:21,155 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 946 transitions. [2021-08-21 16:50:21,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 946 transitions. [2021-08-21 16:50:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:21,156 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:21,156 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:21,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 16:50:21,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 16:50:21,375 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:21,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1817156086, now seen corresponding path program 30 times [2021-08-21 16:50:21,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:21,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543099741] [2021-08-21 16:50:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:21,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:21,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:21,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543099741] [2021-08-21 16:50:21,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543099741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:21,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226153713] [2021-08-21 16:50:21,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:50:21,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:21,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:21,535 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:21,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 16:50:22,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:50:22,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:50:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:22,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226153713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:22,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:22,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 16:50:22,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807022919] [2021-08-21 16:50:22,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:50:22,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:50:22,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:50:22,981 INFO L87 Difference]: Start difference. First operand 698 states and 946 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:23,221 INFO L93 Difference]: Finished difference Result 1604 states and 2034 transitions. [2021-08-21 16:50:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:50:23,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:23,223 INFO L225 Difference]: With dead ends: 1604 [2021-08-21 16:50:23,223 INFO L226 Difference]: Without dead ends: 1454 [2021-08-21 16:50:23,223 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:50:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-21 16:50:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 698. [2021-08-21 16:50:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 690 states have (on average 1.3710144927536232) internal successors, (946), 697 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 946 transitions. [2021-08-21 16:50:23,232 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 946 transitions. Word has length 80 [2021-08-21 16:50:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:23,232 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 946 transitions. [2021-08-21 16:50:23,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 946 transitions. [2021-08-21 16:50:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:23,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:23,233 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:23,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 16:50:23,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 16:50:23,434 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:23,434 INFO L82 PathProgramCache]: Analyzing trace with hash 278532620, now seen corresponding path program 31 times [2021-08-21 16:50:23,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:23,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467353049] [2021-08-21 16:50:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:23,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:23,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:23,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467353049] [2021-08-21 16:50:23,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467353049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:23,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992201007] [2021-08-21 16:50:23,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:50:23,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:23,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:23,581 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:23,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 16:50:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:24,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:50:24,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:25,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992201007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:25,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:25,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 16:50:25,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635997209] [2021-08-21 16:50:25,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:50:25,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:50:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:50:25,037 INFO L87 Difference]: Start difference. First operand 698 states and 946 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:25,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:25,326 INFO L93 Difference]: Finished difference Result 1564 states and 1974 transitions. [2021-08-21 16:50:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:50:25,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:25,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:25,328 INFO L225 Difference]: With dead ends: 1564 [2021-08-21 16:50:25,328 INFO L226 Difference]: Without dead ends: 1414 [2021-08-21 16:50:25,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:50:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-08-21 16:50:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 698. [2021-08-21 16:50:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 690 states have (on average 1.3710144927536232) internal successors, (946), 697 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 946 transitions. [2021-08-21 16:50:25,336 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 946 transitions. Word has length 80 [2021-08-21 16:50:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:25,337 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 946 transitions. [2021-08-21 16:50:25,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 946 transitions. [2021-08-21 16:50:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:25,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:25,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:25,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 16:50:25,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 16:50:25,540 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash -878151538, now seen corresponding path program 32 times [2021-08-21 16:50:25,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:25,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599806360] [2021-08-21 16:50:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:25,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:25,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:25,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599806360] [2021-08-21 16:50:25,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599806360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:25,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126517458] [2021-08-21 16:50:25,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:50:25,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:25,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:25,709 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:25,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 16:50:26,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:50:26,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:50:26,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:27,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126517458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:27,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:27,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 16:50:27,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539352403] [2021-08-21 16:50:27,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:50:27,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:50:27,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:50:27,216 INFO L87 Difference]: Start difference. First operand 698 states and 946 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:27,520 INFO L93 Difference]: Finished difference Result 1524 states and 1914 transitions. [2021-08-21 16:50:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:50:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:27,522 INFO L225 Difference]: With dead ends: 1524 [2021-08-21 16:50:27,522 INFO L226 Difference]: Without dead ends: 1374 [2021-08-21 16:50:27,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:50:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-08-21 16:50:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 698. [2021-08-21 16:50:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 690 states have (on average 1.3710144927536232) internal successors, (946), 697 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 946 transitions. [2021-08-21 16:50:27,531 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 946 transitions. Word has length 80 [2021-08-21 16:50:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:27,532 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 946 transitions. [2021-08-21 16:50:27,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 946 transitions. [2021-08-21 16:50:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:27,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:27,533 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:27,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:27,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:27,749 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1577761168, now seen corresponding path program 33 times [2021-08-21 16:50:27,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:27,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399332276] [2021-08-21 16:50:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:27,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:27,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:27,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399332276] [2021-08-21 16:50:27,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399332276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:27,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293679121] [2021-08-21 16:50:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:50:27,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:27,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:27,885 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:27,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 16:50:29,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:50:29,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:29,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:29,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293679121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:29,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:29,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 16:50:29,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156961472] [2021-08-21 16:50:29,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:50:29,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:29,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:50:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:50:29,397 INFO L87 Difference]: Start difference. First operand 698 states and 946 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:29,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:29,756 INFO L93 Difference]: Finished difference Result 2034 states and 2576 transitions. [2021-08-21 16:50:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:50:29,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:29,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:29,759 INFO L225 Difference]: With dead ends: 2034 [2021-08-21 16:50:29,760 INFO L226 Difference]: Without dead ends: 1829 [2021-08-21 16:50:29,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 16:50:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-08-21 16:50:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 710. [2021-08-21 16:50:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 702 states have (on average 1.3846153846153846) internal successors, (972), 709 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 972 transitions. [2021-08-21 16:50:29,772 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 972 transitions. Word has length 80 [2021-08-21 16:50:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:29,773 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 972 transitions. [2021-08-21 16:50:29,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 972 transitions. [2021-08-21 16:50:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:50:29,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:29,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:29,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:29,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:29,989 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:29,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1620874028, now seen corresponding path program 34 times [2021-08-21 16:50:29,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:29,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372518368] [2021-08-21 16:50:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:29,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:30,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:30,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372518368] [2021-08-21 16:50:30,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372518368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:30,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491102244] [2021-08-21 16:50:30,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:50:30,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:30,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:30,185 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:30,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 16:50:31,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:50:31,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:31,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:50:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491102244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:31,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:31,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 16:50:31,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586022789] [2021-08-21 16:50:31,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:50:31,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:31,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:50:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:50:31,699 INFO L87 Difference]: Start difference. First operand 710 states and 972 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:32,234 INFO L93 Difference]: Finished difference Result 1617 states and 2052 transitions. [2021-08-21 16:50:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:50:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 80 [2021-08-21 16:50:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:32,236 INFO L225 Difference]: With dead ends: 1617 [2021-08-21 16:50:32,236 INFO L226 Difference]: Without dead ends: 1414 [2021-08-21 16:50:32,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:50:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-08-21 16:50:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 723. [2021-08-21 16:50:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 715 states have (on average 1.3678321678321679) internal successors, (978), 722 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 978 transitions. [2021-08-21 16:50:32,244 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 978 transitions. Word has length 80 [2021-08-21 16:50:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:32,245 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 978 transitions. [2021-08-21 16:50:32,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:32,245 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 978 transitions. [2021-08-21 16:50:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:50:32,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:32,246 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:32,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:32,449 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1691728315, now seen corresponding path program 35 times [2021-08-21 16:50:32,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:32,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798735965] [2021-08-21 16:50:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:32,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:32,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:32,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798735965] [2021-08-21 16:50:32,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798735965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:32,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182032186] [2021-08-21 16:50:32,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:50:32,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:32,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:32,633 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:32,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 16:50:33,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 16:50:33,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:33,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:34,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182032186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:34,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:34,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 16:50:34,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646737345] [2021-08-21 16:50:34,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:50:34,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:34,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:50:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:50:34,322 INFO L87 Difference]: Start difference. First operand 723 states and 978 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:34,574 INFO L93 Difference]: Finished difference Result 1464 states and 1876 transitions. [2021-08-21 16:50:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 16:50:34,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-08-21 16:50:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:34,577 INFO L225 Difference]: With dead ends: 1464 [2021-08-21 16:50:34,577 INFO L226 Difference]: Without dead ends: 1314 [2021-08-21 16:50:34,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:50:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-08-21 16:50:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 723. [2021-08-21 16:50:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 715 states have (on average 1.3678321678321679) internal successors, (978), 722 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 978 transitions. [2021-08-21 16:50:34,588 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 978 transitions. Word has length 85 [2021-08-21 16:50:34,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:34,589 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 978 transitions. [2021-08-21 16:50:34,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 978 transitions. [2021-08-21 16:50:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:50:34,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:34,590 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:34,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 16:50:34,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 16:50:34,811 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1699326009, now seen corresponding path program 36 times [2021-08-21 16:50:34,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:34,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008463875] [2021-08-21 16:50:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:34,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:34,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:34,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008463875] [2021-08-21 16:50:34,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008463875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:34,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615533620] [2021-08-21 16:50:34,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:50:34,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:34,971 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:34,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 16:50:36,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 16:50:36,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:36,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:36,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615533620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:36,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:36,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 16:50:36,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870111969] [2021-08-21 16:50:36,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:50:36,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:50:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:50:36,755 INFO L87 Difference]: Start difference. First operand 723 states and 978 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:37,090 INFO L93 Difference]: Finished difference Result 1659 states and 2106 transitions. [2021-08-21 16:50:37,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:50:37,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-08-21 16:50:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:37,093 INFO L225 Difference]: With dead ends: 1659 [2021-08-21 16:50:37,093 INFO L226 Difference]: Without dead ends: 1509 [2021-08-21 16:50:37,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:50:37,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-08-21 16:50:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 723. [2021-08-21 16:50:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 715 states have (on average 1.3678321678321679) internal successors, (978), 722 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 978 transitions. [2021-08-21 16:50:37,104 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 978 transitions. Word has length 85 [2021-08-21 16:50:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:37,104 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 978 transitions. [2021-08-21 16:50:37,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 978 transitions. [2021-08-21 16:50:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:50:37,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:37,106 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:37,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:37,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 16:50:37,306 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:37,306 INFO L82 PathProgramCache]: Analyzing trace with hash 396362697, now seen corresponding path program 37 times [2021-08-21 16:50:37,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:37,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050308355] [2021-08-21 16:50:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:37,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:37,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:37,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050308355] [2021-08-21 16:50:37,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050308355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:37,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019774381] [2021-08-21 16:50:37,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:50:37,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:37,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:37,461 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:37,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 16:50:38,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:38,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:38,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019774381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:39,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 16:50:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383185214] [2021-08-21 16:50:39,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:50:39,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:50:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:50:39,151 INFO L87 Difference]: Start difference. First operand 723 states and 978 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:39,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:39,467 INFO L93 Difference]: Finished difference Result 1619 states and 2046 transitions. [2021-08-21 16:50:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:50:39,467 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-08-21 16:50:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:39,469 INFO L225 Difference]: With dead ends: 1619 [2021-08-21 16:50:39,469 INFO L226 Difference]: Without dead ends: 1469 [2021-08-21 16:50:39,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 16:50:39,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-08-21 16:50:39,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 723. [2021-08-21 16:50:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 715 states have (on average 1.3678321678321679) internal successors, (978), 722 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 978 transitions. [2021-08-21 16:50:39,479 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 978 transitions. Word has length 85 [2021-08-21 16:50:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:39,479 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 978 transitions. [2021-08-21 16:50:39,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 978 transitions. [2021-08-21 16:50:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:50:39,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:39,480 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:39,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 16:50:39,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 16:50:39,681 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash -760321461, now seen corresponding path program 38 times [2021-08-21 16:50:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:39,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739363416] [2021-08-21 16:50:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:39,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:39,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:39,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739363416] [2021-08-21 16:50:39,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739363416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:39,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697991375] [2021-08-21 16:50:39,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:50:39,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:39,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:39,826 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:39,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 16:50:41,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:50:41,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:41,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697991375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:41,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:41,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 16:50:41,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007735155] [2021-08-21 16:50:41,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:50:41,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:50:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:50:41,564 INFO L87 Difference]: Start difference. First operand 723 states and 978 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:41,934 INFO L93 Difference]: Finished difference Result 1579 states and 1986 transitions. [2021-08-21 16:50:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:50:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-08-21 16:50:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:41,947 INFO L225 Difference]: With dead ends: 1579 [2021-08-21 16:50:41,948 INFO L226 Difference]: Without dead ends: 1429 [2021-08-21 16:50:41,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:50:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2021-08-21 16:50:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 723. [2021-08-21 16:50:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 715 states have (on average 1.3678321678321679) internal successors, (978), 722 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 978 transitions. [2021-08-21 16:50:41,959 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 978 transitions. Word has length 85 [2021-08-21 16:50:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:41,959 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 978 transitions. [2021-08-21 16:50:41,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 978 transitions. [2021-08-21 16:50:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:50:41,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:41,960 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:41,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 16:50:42,185 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:42,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1695591245, now seen corresponding path program 39 times [2021-08-21 16:50:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:42,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468601267] [2021-08-21 16:50:42,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:42,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:42,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:42,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468601267] [2021-08-21 16:50:42,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468601267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:42,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334966906] [2021-08-21 16:50:42,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:50:42,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:42,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:42,338 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:42,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 16:50:43,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 16:50:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 16:50:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:44,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334966906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:44,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:44,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-21 16:50:44,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829308553] [2021-08-21 16:50:44,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:50:44,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:44,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:50:44,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:50:44,084 INFO L87 Difference]: Start difference. First operand 723 states and 978 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:44,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:44,462 INFO L93 Difference]: Finished difference Result 2011 states and 2535 transitions. [2021-08-21 16:50:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:50:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-08-21 16:50:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:44,464 INFO L225 Difference]: With dead ends: 2011 [2021-08-21 16:50:44,464 INFO L226 Difference]: Without dead ends: 1849 [2021-08-21 16:50:44,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 16:50:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-08-21 16:50:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 731. [2021-08-21 16:50:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 723 states have (on average 1.3775933609958506) internal successors, (996), 730 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 996 transitions. [2021-08-21 16:50:44,488 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 996 transitions. Word has length 85 [2021-08-21 16:50:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:44,488 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 996 transitions. [2021-08-21 16:50:44,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 996 transitions. [2021-08-21 16:50:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:50:44,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:44,489 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:44,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 16:50:44,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:44,689 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:44,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1738704105, now seen corresponding path program 40 times [2021-08-21 16:50:44,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:44,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79173397] [2021-08-21 16:50:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:44,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:44,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79173397] [2021-08-21 16:50:44,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79173397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575989130] [2021-08-21 16:50:44,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:50:44,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:44,849 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:44,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 16:50:46,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:50:46,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:46,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:50:46,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:46,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575989130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:46,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:46,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-21 16:50:46,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219516186] [2021-08-21 16:50:46,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:50:46,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:50:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:50:46,666 INFO L87 Difference]: Start difference. First operand 731 states and 996 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:47,276 INFO L93 Difference]: Finished difference Result 1697 states and 2134 transitions. [2021-08-21 16:50:47,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:50:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 85 [2021-08-21 16:50:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:47,278 INFO L225 Difference]: With dead ends: 1697 [2021-08-21 16:50:47,279 INFO L226 Difference]: Without dead ends: 1494 [2021-08-21 16:50:47,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:50:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-08-21 16:50:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 598. [2021-08-21 16:50:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 590 states have (on average 1.3559322033898304) internal successors, (800), 597 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) [2021-08-21 16:50:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 800 transitions. [2021-08-21 16:50:47,290 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 800 transitions. Word has length 85 [2021-08-21 16:50:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:47,290 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 800 transitions. [2021-08-21 16:50:47,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 800 transitions. [2021-08-21 16:50:47,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:50:47,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:47,291 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:47,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:47,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 16:50:47,517 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1847254529, now seen corresponding path program 41 times [2021-08-21 16:50:47,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:47,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591303391] [2021-08-21 16:50:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:47,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:47,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:47,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591303391] [2021-08-21 16:50:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591303391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:47,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501991673] [2021-08-21 16:50:47,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:50:47,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:47,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:47,731 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:47,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 16:50:49,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 16:50:49,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:50:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:49,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501991673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:49,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:49,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-08-21 16:50:49,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970820408] [2021-08-21 16:50:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:50:49,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:50:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:50:49,792 INFO L87 Difference]: Start difference. First operand 598 states and 800 transitions. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:50,109 INFO L93 Difference]: Finished difference Result 1362 states and 1747 transitions. [2021-08-21 16:50:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:50:50,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 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 90 [2021-08-21 16:50:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:50,111 INFO L225 Difference]: With dead ends: 1362 [2021-08-21 16:50:50,111 INFO L226 Difference]: Without dead ends: 1172 [2021-08-21 16:50:50,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 16:50:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-08-21 16:50:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 643. [2021-08-21 16:50:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 635 states have (on average 1.3622047244094488) internal successors, (865), 642 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 865 transitions. [2021-08-21 16:50:50,119 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 865 transitions. Word has length 90 [2021-08-21 16:50:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:50,119 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 865 transitions. [2021-08-21 16:50:50,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 865 transitions. [2021-08-21 16:50:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:50:50,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:50,120 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:50,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:50,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 16:50:50,337 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash -871461019, now seen corresponding path program 42 times [2021-08-21 16:50:50,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:50,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890857217] [2021-08-21 16:50:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:50,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:50,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890857217] [2021-08-21 16:50:50,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890857217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:50,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15476425] [2021-08-21 16:50:50,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:50:50,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:50,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:50,540 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:50,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 16:50:52,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 16:50:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 16:50:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:52,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15476425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:52,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:52,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:50:52,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023232841] [2021-08-21 16:50:52,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:50:52,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:50:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:50:52,642 INFO L87 Difference]: Start difference. First operand 643 states and 865 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:52,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:52,880 INFO L93 Difference]: Finished difference Result 1754 states and 2214 transitions. [2021-08-21 16:50:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:50:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:50:52,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:52,883 INFO L225 Difference]: With dead ends: 1754 [2021-08-21 16:50:52,883 INFO L226 Difference]: Without dead ends: 1604 [2021-08-21 16:50:52,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:50:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-08-21 16:50:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 643. [2021-08-21 16:50:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 635 states have (on average 1.3653543307086615) internal successors, (867), 642 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 867 transitions. [2021-08-21 16:50:52,894 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 867 transitions. Word has length 90 [2021-08-21 16:50:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:52,894 INFO L470 AbstractCegarLoop]: Abstraction has 643 states and 867 transitions. [2021-08-21 16:50:52,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 867 transitions. [2021-08-21 16:50:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:50:52,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:52,896 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:52,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 16:50:53,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-21 16:50:53,110 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:53,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash 115297625, now seen corresponding path program 43 times [2021-08-21 16:50:53,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:53,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075702089] [2021-08-21 16:50:53,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:53,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:53,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:53,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075702089] [2021-08-21 16:50:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075702089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:53,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752279085] [2021-08-21 16:50:53,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:50:53,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:53,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:53,288 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:53,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 16:50:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:54,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 16:50:54,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752279085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:55,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:55,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:50:55,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451422094] [2021-08-21 16:50:55,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:50:55,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:50:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:50:55,352 INFO L87 Difference]: Start difference. First operand 643 states and 867 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:55,632 INFO L93 Difference]: Finished difference Result 1749 states and 2201 transitions. [2021-08-21 16:50:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:50:55,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:50:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:55,634 INFO L225 Difference]: With dead ends: 1749 [2021-08-21 16:50:55,634 INFO L226 Difference]: Without dead ends: 1599 [2021-08-21 16:50:55,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:50:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-08-21 16:50:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 673. [2021-08-21 16:50:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 665 states have (on average 1.3669172932330826) internal successors, (909), 672 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 909 transitions. [2021-08-21 16:50:55,643 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 909 transitions. Word has length 90 [2021-08-21 16:50:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:55,643 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 909 transitions. [2021-08-21 16:50:55,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 909 transitions. [2021-08-21 16:50:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:50:55,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:55,644 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:55,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:55,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:55,847 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash 107699931, now seen corresponding path program 44 times [2021-08-21 16:50:55,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:55,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536090124] [2021-08-21 16:50:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:55,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:56,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:56,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536090124] [2021-08-21 16:50:56,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536090124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:56,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496196237] [2021-08-21 16:50:56,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:50:56,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:56,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:56,032 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:56,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 16:50:57,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:50:57,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:50:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 16:50:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:50:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496196237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:58,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:50:58,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:50:58,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649810453] [2021-08-21 16:50:58,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:50:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:50:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:50:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:50:58,156 INFO L87 Difference]: Start difference. First operand 673 states and 909 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:50:58,481 INFO L93 Difference]: Finished difference Result 1739 states and 2183 transitions. [2021-08-21 16:50:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:50:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:50:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:50:58,483 INFO L225 Difference]: With dead ends: 1739 [2021-08-21 16:50:58,483 INFO L226 Difference]: Without dead ends: 1589 [2021-08-21 16:50:58,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:50:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-08-21 16:50:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 703. [2021-08-21 16:50:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 695 states have (on average 1.3683453237410073) internal successors, (951), 702 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 951 transitions. [2021-08-21 16:50:58,491 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 951 transitions. Word has length 90 [2021-08-21 16:50:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:50:58,491 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 951 transitions. [2021-08-21 16:50:58,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:50:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 951 transitions. [2021-08-21 16:50:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:50:58,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:50:58,492 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:50:58,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 16:50:58,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:58,699 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:50:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:50:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2091578659, now seen corresponding path program 45 times [2021-08-21 16:50:58,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:50:58,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069575301] [2021-08-21 16:50:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:50:58,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:50:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:50:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:50:58,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:50:58,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069575301] [2021-08-21 16:50:58,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069575301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:50:58,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217459072] [2021-08-21 16:50:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:50:58,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:50:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:50:58,855 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:50:58,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 16:51:00,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 16:51:00,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:00,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:51:00,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:00,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217459072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:00,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:00,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:51:00,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891593812] [2021-08-21 16:51:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:00,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:00,912 INFO L87 Difference]: Start difference. First operand 703 states and 951 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:01,269 INFO L93 Difference]: Finished difference Result 1729 states and 2165 transitions. [2021-08-21 16:51:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:51:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:51:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:01,271 INFO L225 Difference]: With dead ends: 1729 [2021-08-21 16:51:01,271 INFO L226 Difference]: Without dead ends: 1579 [2021-08-21 16:51:01,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 16:51:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-08-21 16:51:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 733. [2021-08-21 16:51:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 725 states have (on average 1.369655172413793) internal successors, (993), 732 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) [2021-08-21 16:51:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 993 transitions. [2021-08-21 16:51:01,281 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 993 transitions. Word has length 90 [2021-08-21 16:51:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:01,281 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 993 transitions. [2021-08-21 16:51:01,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 993 transitions. [2021-08-21 16:51:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:51:01,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:01,282 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:01,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:01,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:01,497 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1046704479, now seen corresponding path program 46 times [2021-08-21 16:51:01,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:01,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292315194] [2021-08-21 16:51:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:01,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:01,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:01,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292315194] [2021-08-21 16:51:01,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292315194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:01,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792685955] [2021-08-21 16:51:01,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:51:01,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:01,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:01,669 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:01,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 16:51:03,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:51:03,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:03,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 16:51:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:03,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792685955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:03,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:03,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:51:03,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243053067] [2021-08-21 16:51:03,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:03,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:03,833 INFO L87 Difference]: Start difference. First operand 733 states and 993 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:04,240 INFO L93 Difference]: Finished difference Result 1719 states and 2147 transitions. [2021-08-21 16:51:04,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:51:04,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:51:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:04,242 INFO L225 Difference]: With dead ends: 1719 [2021-08-21 16:51:04,243 INFO L226 Difference]: Without dead ends: 1569 [2021-08-21 16:51:04,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:51:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-08-21 16:51:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 763. [2021-08-21 16:51:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 755 states have (on average 1.3708609271523178) internal successors, (1035), 762 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) [2021-08-21 16:51:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1035 transitions. [2021-08-21 16:51:04,255 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1035 transitions. Word has length 90 [2021-08-21 16:51:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:04,255 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 1035 transitions. [2021-08-21 16:51:04,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1035 transitions. [2021-08-21 16:51:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:51:04,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:04,257 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:04,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 16:51:04,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 16:51:04,477 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash -792350111, now seen corresponding path program 47 times [2021-08-21 16:51:04,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:04,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906321242] [2021-08-21 16:51:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:04,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:04,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:04,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906321242] [2021-08-21 16:51:04,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906321242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:04,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753231536] [2021-08-21 16:51:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:51:04,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:04,649 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:04,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 16:51:06,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 16:51:06,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:06,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 16:51:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:06,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753231536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:06,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:06,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:51:06,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576993322] [2021-08-21 16:51:06,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:06,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:06,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:06,728 INFO L87 Difference]: Start difference. First operand 763 states and 1035 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:07,168 INFO L93 Difference]: Finished difference Result 2230 states and 2812 transitions. [2021-08-21 16:51:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 16:51:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:51:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:07,178 INFO L225 Difference]: With dead ends: 2230 [2021-08-21 16:51:07,178 INFO L226 Difference]: Without dead ends: 2025 [2021-08-21 16:51:07,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=516, Invalid=1376, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:51:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-08-21 16:51:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 796. [2021-08-21 16:51:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 788 states have (on average 1.380710659898477) internal successors, (1088), 795 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1088 transitions. [2021-08-21 16:51:07,192 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1088 transitions. Word has length 90 [2021-08-21 16:51:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:07,192 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 1088 transitions. [2021-08-21 16:51:07,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1088 transitions. [2021-08-21 16:51:07,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-21 16:51:07,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:07,210 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:07,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:07,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 16:51:07,427 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:07,427 INFO L82 PathProgramCache]: Analyzing trace with hash -749237251, now seen corresponding path program 48 times [2021-08-21 16:51:07,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:07,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470387821] [2021-08-21 16:51:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:07,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:07,575 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:07,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:07,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470387821] [2021-08-21 16:51:07,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470387821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:07,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365046910] [2021-08-21 16:51:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:51:07,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:07,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:07,576 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:07,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 16:51:09,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 16:51:09,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:51:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:09,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365046910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:09,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:09,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-21 16:51:09,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794012170] [2021-08-21 16:51:09,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:09,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:09,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:09,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:09,680 INFO L87 Difference]: Start difference. First operand 796 states and 1088 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:10,172 INFO L93 Difference]: Finished difference Result 1632 states and 2037 transitions. [2021-08-21 16:51:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:51:10,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-08-21 16:51:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:10,174 INFO L225 Difference]: With dead ends: 1632 [2021-08-21 16:51:10,174 INFO L226 Difference]: Without dead ends: 1509 [2021-08-21 16:51:10,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:51:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-08-21 16:51:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 667. [2021-08-21 16:51:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 659 states have (on average 1.3657056145675266) internal successors, (900), 666 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 900 transitions. [2021-08-21 16:51:10,183 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 900 transitions. Word has length 90 [2021-08-21 16:51:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:10,183 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 900 transitions. [2021-08-21 16:51:10,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 900 transitions. [2021-08-21 16:51:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:10,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:10,184 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:10,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 16:51:10,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 16:51:10,385 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:10,385 INFO L82 PathProgramCache]: Analyzing trace with hash 943087572, now seen corresponding path program 49 times [2021-08-21 16:51:10,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:10,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003190102] [2021-08-21 16:51:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:10,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:10,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:10,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003190102] [2021-08-21 16:51:10,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003190102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:10,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125297705] [2021-08-21 16:51:10,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:51:10,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:10,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:10,605 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:10,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 16:51:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:51:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:12,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125297705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:12,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:12,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 16:51:12,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522726375] [2021-08-21 16:51:12,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:12,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:12,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:12,920 INFO L87 Difference]: Start difference. First operand 667 states and 900 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:13,231 INFO L93 Difference]: Finished difference Result 1533 states and 1949 transitions. [2021-08-21 16:51:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:51:13,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:13,233 INFO L225 Difference]: With dead ends: 1533 [2021-08-21 16:51:13,233 INFO L226 Difference]: Without dead ends: 1383 [2021-08-21 16:51:13,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:51:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-08-21 16:51:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 672. [2021-08-21 16:51:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 664 states have (on average 1.3659638554216869) internal successors, (907), 671 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 907 transitions. [2021-08-21 16:51:13,240 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 907 transitions. Word has length 95 [2021-08-21 16:51:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:13,240 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 907 transitions. [2021-08-21 16:51:13,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 907 transitions. [2021-08-21 16:51:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:13,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:13,241 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:13,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 16:51:13,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 16:51:13,442 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash 79951574, now seen corresponding path program 50 times [2021-08-21 16:51:13,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:13,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875632853] [2021-08-21 16:51:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:13,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:13,629 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:13,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:13,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875632853] [2021-08-21 16:51:13,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875632853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:13,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588441877] [2021-08-21 16:51:13,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:51:13,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:13,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:13,631 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:13,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 16:51:15,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:51:15,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:15,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:51:15,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:16,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588441877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:16,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:16,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 16:51:16,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234746733] [2021-08-21 16:51:16,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:16,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:16,054 INFO L87 Difference]: Start difference. First operand 672 states and 907 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:16,380 INFO L93 Difference]: Finished difference Result 1808 states and 2281 transitions. [2021-08-21 16:51:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:51:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:16,383 INFO L225 Difference]: With dead ends: 1808 [2021-08-21 16:51:16,383 INFO L226 Difference]: Without dead ends: 1658 [2021-08-21 16:51:16,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 16:51:16,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-08-21 16:51:16,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 702. [2021-08-21 16:51:16,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 694 states have (on average 1.3674351585014408) internal successors, (949), 701 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:16,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 949 transitions. [2021-08-21 16:51:16,398 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 949 transitions. Word has length 95 [2021-08-21 16:51:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:16,399 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 949 transitions. [2021-08-21 16:51:16,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 949 transitions. [2021-08-21 16:51:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:16,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:16,400 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:16,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:16,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 16:51:16,613 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:16,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:16,613 INFO L82 PathProgramCache]: Analyzing trace with hash 72353880, now seen corresponding path program 51 times [2021-08-21 16:51:16,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:16,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476583399] [2021-08-21 16:51:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:16,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:16,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:16,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476583399] [2021-08-21 16:51:16,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476583399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:16,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236512588] [2021-08-21 16:51:16,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:51:16,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:16,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:16,813 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:16,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 16:51:18,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 16:51:18,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:51:18,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:19,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236512588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:19,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:19,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 16:51:19,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449664855] [2021-08-21 16:51:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:19,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:19,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:19,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:19,257 INFO L87 Difference]: Start difference. First operand 702 states and 949 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:19,610 INFO L93 Difference]: Finished difference Result 1798 states and 2263 transitions. [2021-08-21 16:51:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:51:19,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:19,612 INFO L225 Difference]: With dead ends: 1798 [2021-08-21 16:51:19,612 INFO L226 Difference]: Without dead ends: 1648 [2021-08-21 16:51:19,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:51:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-08-21 16:51:19,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 732. [2021-08-21 16:51:19,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 724 states have (on average 1.3687845303867403) internal successors, (991), 731 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 991 transitions. [2021-08-21 16:51:19,623 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 991 transitions. Word has length 95 [2021-08-21 16:51:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:19,623 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 991 transitions. [2021-08-21 16:51:19,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 991 transitions. [2021-08-21 16:51:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:19,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:19,624 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:19,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:19,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 16:51:19,825 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2126924710, now seen corresponding path program 52 times [2021-08-21 16:51:19,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:19,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130272330] [2021-08-21 16:51:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:19,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:20,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:20,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130272330] [2021-08-21 16:51:20,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130272330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:20,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594617929] [2021-08-21 16:51:20,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:51:20,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:20,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:20,021 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:20,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 16:51:22,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:51:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:51:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:22,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594617929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:22,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:22,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 16:51:22,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675885954] [2021-08-21 16:51:22,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:22,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:22,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:22,510 INFO L87 Difference]: Start difference. First operand 732 states and 991 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:22,933 INFO L93 Difference]: Finished difference Result 1788 states and 2245 transitions. [2021-08-21 16:51:22,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:51:22,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:22,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:22,935 INFO L225 Difference]: With dead ends: 1788 [2021-08-21 16:51:22,935 INFO L226 Difference]: Without dead ends: 1638 [2021-08-21 16:51:22,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 16:51:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-08-21 16:51:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 762. [2021-08-21 16:51:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 754 states have (on average 1.370026525198939) internal successors, (1033), 761 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1033 transitions. [2021-08-21 16:51:22,944 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1033 transitions. Word has length 95 [2021-08-21 16:51:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:22,944 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1033 transitions. [2021-08-21 16:51:22,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1033 transitions. [2021-08-21 16:51:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:22,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:22,945 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:22,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 16:51:23,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:23,146 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1011358428, now seen corresponding path program 53 times [2021-08-21 16:51:23,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:23,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201143015] [2021-08-21 16:51:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:23,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:23,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:23,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201143015] [2021-08-21 16:51:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201143015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:23,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227871476] [2021-08-21 16:51:23,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:51:23,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:23,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:23,310 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:23,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 16:51:25,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 16:51:25,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:51:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:25,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227871476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:25,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:25,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 16:51:25,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237147026] [2021-08-21 16:51:25,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:25,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:25,748 INFO L87 Difference]: Start difference. First operand 762 states and 1033 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:26,173 INFO L93 Difference]: Finished difference Result 1778 states and 2227 transitions. [2021-08-21 16:51:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:51:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:26,176 INFO L225 Difference]: With dead ends: 1778 [2021-08-21 16:51:26,176 INFO L226 Difference]: Without dead ends: 1628 [2021-08-21 16:51:26,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:51:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-08-21 16:51:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 792. [2021-08-21 16:51:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 784 states have (on average 1.371173469387755) internal successors, (1075), 791 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1075 transitions. [2021-08-21 16:51:26,186 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1075 transitions. Word has length 95 [2021-08-21 16:51:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:26,186 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1075 transitions. [2021-08-21 16:51:26,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1075 transitions. [2021-08-21 16:51:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:26,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:26,187 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:26,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 16:51:26,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:26,388 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -827696162, now seen corresponding path program 54 times [2021-08-21 16:51:26,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:26,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517400231] [2021-08-21 16:51:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:26,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:26,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:26,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517400231] [2021-08-21 16:51:26,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517400231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:26,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584600674] [2021-08-21 16:51:26,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:51:26,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:26,543 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:26,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 16:51:28,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 16:51:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:28,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584600674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:28,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:28,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-21 16:51:28,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085569652] [2021-08-21 16:51:28,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:51:28,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:51:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:51:28,997 INFO L87 Difference]: Start difference. First operand 792 states and 1075 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:29,462 INFO L93 Difference]: Finished difference Result 2215 states and 2787 transitions. [2021-08-21 16:51:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:51:29,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:29,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:29,465 INFO L225 Difference]: With dead ends: 2215 [2021-08-21 16:51:29,465 INFO L226 Difference]: Without dead ends: 2053 [2021-08-21 16:51:29,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 423.4ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:51:29,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-08-21 16:51:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 825. [2021-08-21 16:51:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 817 states have (on average 1.3806609547123623) internal successors, (1128), 824 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) [2021-08-21 16:51:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1128 transitions. [2021-08-21 16:51:29,476 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1128 transitions. Word has length 95 [2021-08-21 16:51:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:29,476 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1128 transitions. [2021-08-21 16:51:29,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1128 transitions. [2021-08-21 16:51:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-21 16:51:29,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:29,477 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:29,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 16:51:29,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:29,689 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash -784583302, now seen corresponding path program 55 times [2021-08-21 16:51:29,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:29,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908262971] [2021-08-21 16:51:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:29,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:29,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:29,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908262971] [2021-08-21 16:51:29,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908262971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:29,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378880997] [2021-08-21 16:51:29,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:51:29,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:29,847 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:29,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 16:51:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 16:51:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:32,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378880997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:32,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:32,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-21 16:51:32,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312506928] [2021-08-21 16:51:32,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:51:32,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:51:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:51:32,357 INFO L87 Difference]: Start difference. First operand 825 states and 1128 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:32,939 INFO L93 Difference]: Finished difference Result 1681 states and 2097 transitions. [2021-08-21 16:51:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:51:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-08-21 16:51:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:32,941 INFO L225 Difference]: With dead ends: 1681 [2021-08-21 16:51:32,941 INFO L226 Difference]: Without dead ends: 1558 [2021-08-21 16:51:32,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 16:51:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2021-08-21 16:51:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 662. [2021-08-21 16:51:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 654 states have (on average 1.3608562691131498) internal successors, (890), 661 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 890 transitions. [2021-08-21 16:51:32,950 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 890 transitions. Word has length 95 [2021-08-21 16:51:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:32,950 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 890 transitions. [2021-08-21 16:51:32,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 890 transitions. [2021-08-21 16:51:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:32,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:32,951 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:32,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:33,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-21 16:51:33,153 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1636129550, now seen corresponding path program 56 times [2021-08-21 16:51:33,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:33,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074193432] [2021-08-21 16:51:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:33,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:33,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:33,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074193432] [2021-08-21 16:51:33,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074193432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:33,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750665535] [2021-08-21 16:51:33,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:51:33,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:33,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:33,384 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:33,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 16:51:35,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:51:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:51:35,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:36,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750665535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:36,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:36,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-08-21 16:51:36,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694553970] [2021-08-21 16:51:36,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:51:36,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:51:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:51:36,314 INFO L87 Difference]: Start difference. First operand 662 states and 890 transitions. Second operand has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:36,687 INFO L93 Difference]: Finished difference Result 1476 states and 1897 transitions. [2021-08-21 16:51:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:51:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:36,688 INFO L225 Difference]: With dead ends: 1476 [2021-08-21 16:51:36,689 INFO L226 Difference]: Without dead ends: 1286 [2021-08-21 16:51:36,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 16:51:36,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-08-21 16:51:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 707. [2021-08-21 16:51:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 699 states have (on average 1.3662374821173104) internal successors, (955), 706 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 955 transitions. [2021-08-21 16:51:36,696 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 955 transitions. Word has length 100 [2021-08-21 16:51:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:36,696 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 955 transitions. [2021-08-21 16:51:36,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.391304347826087) internal successors, (124), 23 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 955 transitions. [2021-08-21 16:51:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:36,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:36,697 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:36,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 16:51:36,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 16:51:36,898 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1873395956, now seen corresponding path program 57 times [2021-08-21 16:51:36,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:36,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695587170] [2021-08-21 16:51:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:36,899 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:37,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:37,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695587170] [2021-08-21 16:51:37,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695587170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:37,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407823039] [2021-08-21 16:51:37,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:51:37,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:37,198 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:37,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 16:51:39,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 16:51:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:39,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:39,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407823039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:40,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:51:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321605643] [2021-08-21 16:51:40,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:51:40,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:51:40,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:51:40,011 INFO L87 Difference]: Start difference. First operand 707 states and 955 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:40,289 INFO L93 Difference]: Finished difference Result 1968 states and 2484 transitions. [2021-08-21 16:51:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 16:51:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:40,291 INFO L225 Difference]: With dead ends: 1968 [2021-08-21 16:51:40,291 INFO L226 Difference]: Without dead ends: 1818 [2021-08-21 16:51:40,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:51:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2021-08-21 16:51:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 707. [2021-08-21 16:51:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 699 states have (on average 1.3690987124463518) internal successors, (957), 706 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 957 transitions. [2021-08-21 16:51:40,300 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 957 transitions. Word has length 100 [2021-08-21 16:51:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:40,301 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 957 transitions. [2021-08-21 16:51:40,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 957 transitions. [2021-08-21 16:51:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:40,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:40,302 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:40,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:40,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:40,502 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash 678206952, now seen corresponding path program 58 times [2021-08-21 16:51:40,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:40,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219244091] [2021-08-21 16:51:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:40,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:40,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:40,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219244091] [2021-08-21 16:51:40,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219244091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:40,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444415317] [2021-08-21 16:51:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:51:40,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:40,709 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:40,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 16:51:43,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:51:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:43,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:43,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:43,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444415317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:43,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:43,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:51:43,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139286177] [2021-08-21 16:51:43,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:51:43,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:43,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:51:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:51:43,579 INFO L87 Difference]: Start difference. First operand 707 states and 957 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:43,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:43,905 INFO L93 Difference]: Finished difference Result 1963 states and 2471 transitions. [2021-08-21 16:51:43,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:51:43,905 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:43,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:43,907 INFO L225 Difference]: With dead ends: 1963 [2021-08-21 16:51:43,907 INFO L226 Difference]: Without dead ends: 1813 [2021-08-21 16:51:43,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 16:51:43,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-08-21 16:51:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 737. [2021-08-21 16:51:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 729 states have (on average 1.3703703703703705) internal successors, (999), 736 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 999 transitions. [2021-08-21 16:51:43,916 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 999 transitions. Word has length 100 [2021-08-21 16:51:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:43,917 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 999 transitions. [2021-08-21 16:51:43,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 999 transitions. [2021-08-21 16:51:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:43,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:43,918 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:43,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 16:51:44,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:44,118 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:44,118 INFO L82 PathProgramCache]: Analyzing trace with hash -184929046, now seen corresponding path program 59 times [2021-08-21 16:51:44,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:44,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582202035] [2021-08-21 16:51:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:44,119 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:44,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:44,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582202035] [2021-08-21 16:51:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582202035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:44,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021569578] [2021-08-21 16:51:44,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:51:44,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:44,311 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:44,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 16:51:46,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 16:51:46,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:47,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021569578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:47,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:47,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:51:47,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402610892] [2021-08-21 16:51:47,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:51:47,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:51:47,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:51:47,236 INFO L87 Difference]: Start difference. First operand 737 states and 999 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:47,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:47,586 INFO L93 Difference]: Finished difference Result 1953 states and 2453 transitions. [2021-08-21 16:51:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:51:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:47,588 INFO L225 Difference]: With dead ends: 1953 [2021-08-21 16:51:47,589 INFO L226 Difference]: Without dead ends: 1803 [2021-08-21 16:51:47,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:51:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-08-21 16:51:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 767. [2021-08-21 16:51:47,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 759 states have (on average 1.3715415019762847) internal successors, (1041), 766 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1041 transitions. [2021-08-21 16:51:47,602 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1041 transitions. Word has length 100 [2021-08-21 16:51:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:47,602 INFO L470 AbstractCegarLoop]: Abstraction has 767 states and 1041 transitions. [2021-08-21 16:51:47,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1041 transitions. [2021-08-21 16:51:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:47,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:47,604 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:47,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:47,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 16:51:47,825 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash -192526740, now seen corresponding path program 60 times [2021-08-21 16:51:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:47,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887209978] [2021-08-21 16:51:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:47,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:48,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:48,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887209978] [2021-08-21 16:51:48,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887209978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:48,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627193256] [2021-08-21 16:51:48,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:51:48,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:48,023 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:48,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 16:51:50,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 16:51:50,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:50,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627193256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:50,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:50,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:51:50,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701629651] [2021-08-21 16:51:50,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:51:50,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:51:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:51:50,920 INFO L87 Difference]: Start difference. First operand 767 states and 1041 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:51,340 INFO L93 Difference]: Finished difference Result 1943 states and 2435 transitions. [2021-08-21 16:51:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:51:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:51,343 INFO L225 Difference]: With dead ends: 1943 [2021-08-21 16:51:51,343 INFO L226 Difference]: Without dead ends: 1793 [2021-08-21 16:51:51,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 16:51:51,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-08-21 16:51:51,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 797. [2021-08-21 16:51:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 789 states have (on average 1.3726235741444868) internal successors, (1083), 796 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1083 transitions. [2021-08-21 16:51:51,353 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1083 transitions. Word has length 100 [2021-08-21 16:51:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:51,353 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 1083 transitions. [2021-08-21 16:51:51,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1083 transitions. [2021-08-21 16:51:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:51,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:51,354 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:51,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 16:51:51,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 16:51:51,555 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1903161966, now seen corresponding path program 61 times [2021-08-21 16:51:51,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:51,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728561033] [2021-08-21 16:51:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:51,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:51,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:51,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728561033] [2021-08-21 16:51:51,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728561033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:51,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372054543] [2021-08-21 16:51:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:51:51,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:51,743 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:51,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 16:51:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:54,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:54,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372054543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:54,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:54,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:51:54,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218565748] [2021-08-21 16:51:54,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:51:54,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:51:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:51:54,691 INFO L87 Difference]: Start difference. First operand 797 states and 1083 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:55,122 INFO L93 Difference]: Finished difference Result 1933 states and 2417 transitions. [2021-08-21 16:51:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:51:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:55,124 INFO L225 Difference]: With dead ends: 1933 [2021-08-21 16:51:55,124 INFO L226 Difference]: Without dead ends: 1783 [2021-08-21 16:51:55,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:51:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2021-08-21 16:51:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 827. [2021-08-21 16:51:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 819 states have (on average 1.3736263736263736) internal successors, (1125), 826 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1125 transitions. [2021-08-21 16:51:55,134 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1125 transitions. Word has length 100 [2021-08-21 16:51:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:55,134 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1125 transitions. [2021-08-21 16:51:55,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1125 transitions. [2021-08-21 16:51:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:55,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:55,136 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:55,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 16:51:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:55,336 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash 746477808, now seen corresponding path program 62 times [2021-08-21 16:51:55,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:55,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195034898] [2021-08-21 16:51:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:55,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:55,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:55,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195034898] [2021-08-21 16:51:55,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195034898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:55,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552013365] [2021-08-21 16:51:55,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:51:55,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:55,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:55,502 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:55,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 16:51:58,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:51:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:51:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:51:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:51:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:58,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552013365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:58,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:51:58,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:51:58,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062174264] [2021-08-21 16:51:58,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:51:58,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:51:58,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:51:58,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:51:58,470 INFO L87 Difference]: Start difference. First operand 827 states and 1125 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:51:58,935 INFO L93 Difference]: Finished difference Result 1923 states and 2399 transitions. [2021-08-21 16:51:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:51:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:51:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:51:58,938 INFO L225 Difference]: With dead ends: 1923 [2021-08-21 16:51:58,938 INFO L226 Difference]: Without dead ends: 1773 [2021-08-21 16:51:58,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:51:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-08-21 16:51:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 857. [2021-08-21 16:51:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 849 states have (on average 1.3745583038869258) internal successors, (1167), 856 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1167 transitions. [2021-08-21 16:51:58,949 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1167 transitions. Word has length 100 [2021-08-21 16:51:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:51:58,949 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1167 transitions. [2021-08-21 16:51:58,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:51:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1167 transitions. [2021-08-21 16:51:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:51:58,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:51:58,951 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:51:58,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 16:51:59,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 16:51:59,151 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:51:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:51:59,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1092576782, now seen corresponding path program 63 times [2021-08-21 16:51:59,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:51:59,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635124482] [2021-08-21 16:51:59,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:51:59,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:51:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:51:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:51:59,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:51:59,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635124482] [2021-08-21 16:51:59,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635124482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:51:59,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610033224] [2021-08-21 16:51:59,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:51:59,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:51:59,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:51:59,332 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:51:59,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 16:52:02,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 16:52:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:02,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:02,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610033224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:02,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:02,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:52:02,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008149787] [2021-08-21 16:52:02,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:52:02,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:52:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:52:02,349 INFO L87 Difference]: Start difference. First operand 857 states and 1167 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:02,858 INFO L93 Difference]: Finished difference Result 2385 states and 2989 transitions. [2021-08-21 16:52:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:52:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:52:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:02,861 INFO L225 Difference]: With dead ends: 2385 [2021-08-21 16:52:02,861 INFO L226 Difference]: Without dead ends: 2223 [2021-08-21 16:52:02,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 16:52:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-08-21 16:52:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 890. [2021-08-21 16:52:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 882 states have (on average 1.383219954648526) internal successors, (1220), 889 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1220 transitions. [2021-08-21 16:52:02,878 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1220 transitions. Word has length 100 [2021-08-21 16:52:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:02,878 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1220 transitions. [2021-08-21 16:52:02,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:02,878 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1220 transitions. [2021-08-21 16:52:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 16:52:02,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:02,880 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:02,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 16:52:03,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:03,105 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1049463922, now seen corresponding path program 64 times [2021-08-21 16:52:03,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:03,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576942044] [2021-08-21 16:52:03,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:03,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:03,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:03,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576942044] [2021-08-21 16:52:03,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576942044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:03,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070951704] [2021-08-21 16:52:03,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:52:03,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:03,278 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:03,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 16:52:06,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:52:06,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 16:52:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:06,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070951704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:06,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:06,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-21 16:52:06,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708939148] [2021-08-21 16:52:06,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:52:06,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:52:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:52:06,319 INFO L87 Difference]: Start difference. First operand 890 states and 1220 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:07,042 INFO L93 Difference]: Finished difference Result 1836 states and 2289 transitions. [2021-08-21 16:52:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:52:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-08-21 16:52:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:07,044 INFO L225 Difference]: With dead ends: 1836 [2021-08-21 16:52:07,044 INFO L226 Difference]: Without dead ends: 1713 [2021-08-21 16:52:07,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 658.9ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:52:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-08-21 16:52:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 727. [2021-08-21 16:52:07,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 719 states have (on average 1.3657858136300418) internal successors, (982), 726 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 982 transitions. [2021-08-21 16:52:07,055 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 982 transitions. Word has length 100 [2021-08-21 16:52:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:07,055 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 982 transitions. [2021-08-21 16:52:07,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 982 transitions. [2021-08-21 16:52:07,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:07,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:07,056 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:07,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 16:52:07,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:07,257 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2004292259, now seen corresponding path program 65 times [2021-08-21 16:52:07,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:07,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049487731] [2021-08-21 16:52:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:07,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:07,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:07,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049487731] [2021-08-21 16:52:07,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049487731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:07,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129437520] [2021-08-21 16:52:07,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:52:07,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:07,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:07,490 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:07,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 16:52:10,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 16:52:10,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:10,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:10,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129437520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:10,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:10,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:10,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617088408] [2021-08-21 16:52:10,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:10,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:10,777 INFO L87 Difference]: Start difference. First operand 727 states and 982 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:11,113 INFO L93 Difference]: Finished difference Result 1693 states and 2151 transitions. [2021-08-21 16:52:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:52:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:11,115 INFO L225 Difference]: With dead ends: 1693 [2021-08-21 16:52:11,115 INFO L226 Difference]: Without dead ends: 1543 [2021-08-21 16:52:11,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:52:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-08-21 16:52:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 732. [2021-08-21 16:52:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 724 states have (on average 1.3660220994475138) internal successors, (989), 731 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 989 transitions. [2021-08-21 16:52:11,125 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 989 transitions. Word has length 105 [2021-08-21 16:52:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:11,125 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 989 transitions. [2021-08-21 16:52:11,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 989 transitions. [2021-08-21 16:52:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:11,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:11,126 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:11,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 16:52:11,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 16:52:11,327 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -956477659, now seen corresponding path program 66 times [2021-08-21 16:52:11,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:11,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929023922] [2021-08-21 16:52:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:11,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:11,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:11,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929023922] [2021-08-21 16:52:11,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929023922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:11,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218091795] [2021-08-21 16:52:11,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:52:11,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:11,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:11,566 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:11,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 16:52:14,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 16:52:14,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:14,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:14,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218091795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:14,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:14,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:14,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049484750] [2021-08-21 16:52:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:14,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:14,925 INFO L87 Difference]: Start difference. First operand 732 states and 989 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:15,299 INFO L93 Difference]: Finished difference Result 2018 states and 2543 transitions. [2021-08-21 16:52:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:52:15,299 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:15,301 INFO L225 Difference]: With dead ends: 2018 [2021-08-21 16:52:15,301 INFO L226 Difference]: Without dead ends: 1868 [2021-08-21 16:52:15,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:52:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-08-21 16:52:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 762. [2021-08-21 16:52:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 754 states have (on average 1.3673740053050398) internal successors, (1031), 761 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1031 transitions. [2021-08-21 16:52:15,310 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1031 transitions. Word has length 105 [2021-08-21 16:52:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:15,310 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1031 transitions. [2021-08-21 16:52:15,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1031 transitions. [2021-08-21 16:52:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:15,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:15,311 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:15,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 16:52:15,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:15,511 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:15,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:15,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1819613657, now seen corresponding path program 67 times [2021-08-21 16:52:15,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:15,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169208416] [2021-08-21 16:52:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:15,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:15,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:15,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169208416] [2021-08-21 16:52:15,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169208416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:15,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008343670] [2021-08-21 16:52:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:52:15,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:15,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:15,749 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:15,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 16:52:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:18,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:19,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008343670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:19,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:19,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:19,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637026251] [2021-08-21 16:52:19,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:19,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:19,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:19,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:19,161 INFO L87 Difference]: Start difference. First operand 762 states and 1031 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:19,599 INFO L93 Difference]: Finished difference Result 2008 states and 2525 transitions. [2021-08-21 16:52:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:52:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:19,601 INFO L225 Difference]: With dead ends: 2008 [2021-08-21 16:52:19,602 INFO L226 Difference]: Without dead ends: 1858 [2021-08-21 16:52:19,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 16:52:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-08-21 16:52:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 792. [2021-08-21 16:52:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 784 states have (on average 1.3686224489795917) internal successors, (1073), 791 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1073 transitions. [2021-08-21 16:52:19,612 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1073 transitions. Word has length 105 [2021-08-21 16:52:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:19,612 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1073 transitions. [2021-08-21 16:52:19,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1073 transitions. [2021-08-21 16:52:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:19,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:19,613 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:19,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 16:52:19,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:19,818 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:19,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1827211351, now seen corresponding path program 68 times [2021-08-21 16:52:19,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:19,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447167306] [2021-08-21 16:52:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:19,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:20,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:20,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447167306] [2021-08-21 16:52:20,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447167306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:20,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308971242] [2021-08-21 16:52:20,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:52:20,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:20,057 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:20,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 16:52:23,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:52:23,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:23,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308971242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:23,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:23,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:23,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608658361] [2021-08-21 16:52:23,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:23,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:23,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:23,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:23,432 INFO L87 Difference]: Start difference. First operand 792 states and 1073 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:23,901 INFO L93 Difference]: Finished difference Result 1998 states and 2507 transitions. [2021-08-21 16:52:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:52:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:23,904 INFO L225 Difference]: With dead ends: 1998 [2021-08-21 16:52:23,904 INFO L226 Difference]: Without dead ends: 1848 [2021-08-21 16:52:23,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:52:23,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2021-08-21 16:52:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 822. [2021-08-21 16:52:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 814 states have (on average 1.3697788697788698) internal successors, (1115), 821 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 1115 transitions. [2021-08-21 16:52:23,913 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 1115 transitions. Word has length 105 [2021-08-21 16:52:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:23,913 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 1115 transitions. [2021-08-21 16:52:23,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 1115 transitions. [2021-08-21 16:52:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:23,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:23,914 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:23,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 16:52:24,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:24,116 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash 268477355, now seen corresponding path program 69 times [2021-08-21 16:52:24,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:24,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989900964] [2021-08-21 16:52:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:24,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:24,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:24,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989900964] [2021-08-21 16:52:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989900964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:24,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461716839] [2021-08-21 16:52:24,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:52:24,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:24,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:24,309 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:24,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 16:52:27,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 16:52:27,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:52:27,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:27,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461716839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:27,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:27,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:27,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682412458] [2021-08-21 16:52:27,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:27,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:27,673 INFO L87 Difference]: Start difference. First operand 822 states and 1115 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:28,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:28,184 INFO L93 Difference]: Finished difference Result 1988 states and 2489 transitions. [2021-08-21 16:52:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:52:28,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:28,187 INFO L225 Difference]: With dead ends: 1988 [2021-08-21 16:52:28,187 INFO L226 Difference]: Without dead ends: 1838 [2021-08-21 16:52:28,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:52:28,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-08-21 16:52:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 852. [2021-08-21 16:52:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 844 states have (on average 1.3708530805687205) internal successors, (1157), 851 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1157 transitions. [2021-08-21 16:52:28,196 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1157 transitions. Word has length 105 [2021-08-21 16:52:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:28,197 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1157 transitions. [2021-08-21 16:52:28,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1157 transitions. [2021-08-21 16:52:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:28,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:28,198 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:28,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 16:52:28,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 16:52:28,398 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:28,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:28,399 INFO L82 PathProgramCache]: Analyzing trace with hash -888206803, now seen corresponding path program 70 times [2021-08-21 16:52:28,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:28,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008348843] [2021-08-21 16:52:28,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:28,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:28,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:28,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008348843] [2021-08-21 16:52:28,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008348843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:28,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302564118] [2021-08-21 16:52:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:52:28,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:28,617 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:28,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 16:52:31,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:52:31,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:32,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302564118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:32,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:32,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:32,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664816747] [2021-08-21 16:52:32,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:32,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:32,114 INFO L87 Difference]: Start difference. First operand 852 states and 1157 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:32,644 INFO L93 Difference]: Finished difference Result 1978 states and 2471 transitions. [2021-08-21 16:52:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:52:32,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:32,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:32,646 INFO L225 Difference]: With dead ends: 1978 [2021-08-21 16:52:32,646 INFO L226 Difference]: Without dead ends: 1828 [2021-08-21 16:52:32,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:52:32,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-08-21 16:52:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 882. [2021-08-21 16:52:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 874 states have (on average 1.3718535469107551) internal successors, (1199), 881 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1199 transitions. [2021-08-21 16:52:32,656 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1199 transitions. Word has length 105 [2021-08-21 16:52:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:32,656 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1199 transitions. [2021-08-21 16:52:32,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1199 transitions. [2021-08-21 16:52:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:32,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:32,657 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:32,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 16:52:32,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:32,858 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1567705903, now seen corresponding path program 71 times [2021-08-21 16:52:32,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:32,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586251504] [2021-08-21 16:52:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:32,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:33,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:33,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586251504] [2021-08-21 16:52:33,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586251504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:33,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883823859] [2021-08-21 16:52:33,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:52:33,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:33,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:33,045 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:33,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 16:52:36,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 16:52:36,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-21 16:52:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:36,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883823859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:36,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:36,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-21 16:52:36,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436920445] [2021-08-21 16:52:36,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:52:36,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:52:36,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:52:36,508 INFO L87 Difference]: Start difference. First operand 882 states and 1199 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:37,100 INFO L93 Difference]: Finished difference Result 2415 states and 3031 transitions. [2021-08-21 16:52:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:52:37,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:37,103 INFO L225 Difference]: With dead ends: 2415 [2021-08-21 16:52:37,103 INFO L226 Difference]: Without dead ends: 2253 [2021-08-21 16:52:37,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:52:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-08-21 16:52:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 915. [2021-08-21 16:52:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 907 states have (on average 1.380374862183021) internal successors, (1252), 914 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1252 transitions. [2021-08-21 16:52:37,115 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1252 transitions. Word has length 105 [2021-08-21 16:52:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:37,116 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 1252 transitions. [2021-08-21 16:52:37,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1252 transitions. [2021-08-21 16:52:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 16:52:37,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:37,117 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:37,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 16:52:37,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:37,317 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:37,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:37,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1610818763, now seen corresponding path program 72 times [2021-08-21 16:52:37,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:37,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934892538] [2021-08-21 16:52:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:37,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:37,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:37,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934892538] [2021-08-21 16:52:37,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934892538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:37,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224349976] [2021-08-21 16:52:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:52:37,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:37,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:37,513 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:37,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 16:52:40,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 16:52:40,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:52:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:40,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224349976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:41,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:41,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-21 16:52:41,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409292449] [2021-08-21 16:52:41,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:52:41,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:52:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:52:41,000 INFO L87 Difference]: Start difference. First operand 915 states and 1252 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:41,776 INFO L93 Difference]: Finished difference Result 2101 states and 2630 transitions. [2021-08-21 16:52:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:52:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 105 [2021-08-21 16:52:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:41,779 INFO L225 Difference]: With dead ends: 2101 [2021-08-21 16:52:41,779 INFO L226 Difference]: Without dead ends: 1898 [2021-08-21 16:52:41,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:52:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-08-21 16:52:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 928. [2021-08-21 16:52:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 920 states have (on average 1.367391304347826) internal successors, (1258), 927 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1258 transitions. [2021-08-21 16:52:41,789 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1258 transitions. Word has length 105 [2021-08-21 16:52:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:41,789 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 1258 transitions. [2021-08-21 16:52:41,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1258 transitions. [2021-08-21 16:52:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:52:41,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:41,790 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:41,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 16:52:41,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-08-21 16:52:41,991 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash -833041059, now seen corresponding path program 73 times [2021-08-21 16:52:41,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:41,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215418795] [2021-08-21 16:52:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:41,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:42,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:42,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215418795] [2021-08-21 16:52:42,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215418795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:42,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590294126] [2021-08-21 16:52:42,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:52:42,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:42,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:42,280 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:42,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 16:52:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:52:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:46,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590294126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:46,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:46,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-08-21 16:52:46,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139797878] [2021-08-21 16:52:46,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:52:46,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:52:46,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:52:46,157 INFO L87 Difference]: Start difference. First operand 928 states and 1258 transitions. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:46,573 INFO L93 Difference]: Finished difference Result 1802 states and 2335 transitions. [2021-08-21 16:52:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:52:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 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 110 [2021-08-21 16:52:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:46,575 INFO L225 Difference]: With dead ends: 1802 [2021-08-21 16:52:46,575 INFO L226 Difference]: Without dead ends: 1612 [2021-08-21 16:52:46,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:52:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-08-21 16:52:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 973. [2021-08-21 16:52:46,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 965 states have (on average 1.3709844559585491) internal successors, (1323), 972 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1323 transitions. [2021-08-21 16:52:46,585 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1323 transitions. Word has length 110 [2021-08-21 16:52:46,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:46,585 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1323 transitions. [2021-08-21 16:52:46,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:46,585 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1323 transitions. [2021-08-21 16:52:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:52:46,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:46,586 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:46,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 16:52:46,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:46,788 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2138803139, now seen corresponding path program 74 times [2021-08-21 16:52:46,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:46,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779116733] [2021-08-21 16:52:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:46,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:47,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:47,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779116733] [2021-08-21 16:52:47,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779116733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:47,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957159489] [2021-08-21 16:52:47,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:52:47,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:47,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:47,123 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:47,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 16:52:50,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:52:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:52:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:51,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957159489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:51,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:51,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:52:51,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406039399] [2021-08-21 16:52:51,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:52:51,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:51,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:52:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:52:51,067 INFO L87 Difference]: Start difference. First operand 973 states and 1323 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:51,397 INFO L93 Difference]: Finished difference Result 2359 states and 3001 transitions. [2021-08-21 16:52:51,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:52:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:52:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:51,400 INFO L225 Difference]: With dead ends: 2359 [2021-08-21 16:52:51,400 INFO L226 Difference]: Without dead ends: 2209 [2021-08-21 16:52:51,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:52:51,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-08-21 16:52:51,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 968. [2021-08-21 16:52:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:52:51,411 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:52:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:52:51,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:52:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:52:51,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:51,413 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:51,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 16:52:51,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:51,614 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:51,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:51,614 INFO L82 PathProgramCache]: Analyzing trace with hash 559269815, now seen corresponding path program 75 times [2021-08-21 16:52:51,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:51,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526878314] [2021-08-21 16:52:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:51,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:51,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:51,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526878314] [2021-08-21 16:52:51,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526878314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:51,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300453079] [2021-08-21 16:52:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:52:51,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:51,888 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:51,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 16:52:55,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 16:52:55,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:52:55,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:52:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:52:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:55,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300453079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:55,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:52:55,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:52:55,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798161308] [2021-08-21 16:52:55,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:52:55,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:52:55,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:52:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:52:55,801 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:52:56,163 INFO L93 Difference]: Finished difference Result 2324 states and 2946 transitions. [2021-08-21 16:52:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:52:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:52:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:52:56,166 INFO L225 Difference]: With dead ends: 2324 [2021-08-21 16:52:56,166 INFO L226 Difference]: Without dead ends: 2174 [2021-08-21 16:52:56,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 16:52:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-08-21 16:52:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 968. [2021-08-21 16:52:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:52:56,179 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:52:56,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:52:56,179 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:52:56,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:52:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:52:56,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:52:56,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:52:56,180 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:52:56,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 16:52:56,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:56,381 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:52:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:52:56,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1893467193, now seen corresponding path program 76 times [2021-08-21 16:52:56,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:52:56,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134078232] [2021-08-21 16:52:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:52:56,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:52:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:52:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:52:56,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:52:56,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134078232] [2021-08-21 16:52:56,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134078232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:52:56,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671083940] [2021-08-21 16:52:56,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:52:56,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:52:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:52:56,619 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:52:56,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 16:53:00,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:53:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:53:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:00,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671083940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:00,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:00,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:53:00,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051470456] [2021-08-21 16:53:00,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:53:00,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:53:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:53:00,603 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:01,021 INFO L93 Difference]: Finished difference Result 2284 states and 2886 transitions. [2021-08-21 16:53:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:53:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:01,024 INFO L225 Difference]: With dead ends: 2284 [2021-08-21 16:53:01,024 INFO L226 Difference]: Without dead ends: 2134 [2021-08-21 16:53:01,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:53:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-08-21 16:53:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 968. [2021-08-21 16:53:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:53:01,035 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:53:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:53:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:53:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:53:01,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:01,037 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:01,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:01,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 16:53:01,237 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:01,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1030331195, now seen corresponding path program 77 times [2021-08-21 16:53:01,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:01,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123525460] [2021-08-21 16:53:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:01,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:01,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:01,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123525460] [2021-08-21 16:53:01,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123525460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:01,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094179084] [2021-08-21 16:53:01,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:53:01,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:01,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:01,491 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:01,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 16:53:04,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 16:53:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:53:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:05,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094179084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:05,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:05,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:53:05,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135696381] [2021-08-21 16:53:05,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:53:05,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:53:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:53:05,429 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:05,890 INFO L93 Difference]: Finished difference Result 2244 states and 2826 transitions. [2021-08-21 16:53:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:53:05,890 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:05,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:05,893 INFO L225 Difference]: With dead ends: 2244 [2021-08-21 16:53:05,893 INFO L226 Difference]: Without dead ends: 2094 [2021-08-21 16:53:05,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:53:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-08-21 16:53:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 968. [2021-08-21 16:53:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:53:05,904 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:53:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:05,904 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:53:05,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:53:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:53:05,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:05,906 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:05,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 16:53:06,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 16:53:06,106 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1022733501, now seen corresponding path program 78 times [2021-08-21 16:53:06,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:06,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168478133] [2021-08-21 16:53:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:06,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:06,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:06,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168478133] [2021-08-21 16:53:06,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168478133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:06,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541825872] [2021-08-21 16:53:06,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:53:06,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:06,335 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:06,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 16:53:09,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 16:53:09,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:09,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:53:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:10,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541825872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:10,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:10,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:53:10,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777317327] [2021-08-21 16:53:10,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:53:10,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:53:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:53:10,349 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:10,844 INFO L93 Difference]: Finished difference Result 2204 states and 2766 transitions. [2021-08-21 16:53:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:53:10,844 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:10,847 INFO L225 Difference]: With dead ends: 2204 [2021-08-21 16:53:10,847 INFO L226 Difference]: Without dead ends: 2054 [2021-08-21 16:53:10,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 16:53:10,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-08-21 16:53:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 968. [2021-08-21 16:53:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:53:10,858 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:53:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:10,858 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:53:10,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:53:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:53:10,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:10,860 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:10,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:11,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-21 16:53:11,060 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1176545089, now seen corresponding path program 79 times [2021-08-21 16:53:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:11,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029352682] [2021-08-21 16:53:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:11,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:11,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:11,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029352682] [2021-08-21 16:53:11,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029352682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:11,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088207781] [2021-08-21 16:53:11,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:53:11,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:11,273 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:11,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 16:53:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:53:14,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:15,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088207781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:15,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:15,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:53:15,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22474839] [2021-08-21 16:53:15,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:53:15,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:53:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:53:15,305 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:15,837 INFO L93 Difference]: Finished difference Result 2164 states and 2706 transitions. [2021-08-21 16:53:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:53:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:15,840 INFO L225 Difference]: With dead ends: 2164 [2021-08-21 16:53:15,840 INFO L226 Difference]: Without dead ends: 2014 [2021-08-21 16:53:15,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 16:53:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-08-21 16:53:15,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 968. [2021-08-21 16:53:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:53:15,851 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:53:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:15,851 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:53:15,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:53:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:53:15,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:15,852 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:15,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-21 16:53:16,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 16:53:16,053 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:16,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:16,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1961738049, now seen corresponding path program 80 times [2021-08-21 16:53:16,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:16,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399308522] [2021-08-21 16:53:16,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:16,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:16,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:16,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399308522] [2021-08-21 16:53:16,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399308522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:16,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723388025] [2021-08-21 16:53:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:53:16,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:16,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:16,260 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:16,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 16:53:19,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:53:19,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:19,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:53:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:20,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723388025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:20,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:20,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:53:20,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716110723] [2021-08-21 16:53:20,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:53:20,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:53:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:53:20,352 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:20,914 INFO L93 Difference]: Finished difference Result 2124 states and 2646 transitions. [2021-08-21 16:53:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:53:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:20,917 INFO L225 Difference]: With dead ends: 2124 [2021-08-21 16:53:20,917 INFO L226 Difference]: Without dead ends: 1974 [2021-08-21 16:53:20,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 544.8ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 16:53:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2021-08-21 16:53:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 968. [2021-08-21 16:53:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3729166666666666) internal successors, (1318), 967 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1318 transitions. [2021-08-21 16:53:20,928 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1318 transitions. Word has length 110 [2021-08-21 16:53:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:20,928 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1318 transitions. [2021-08-21 16:53:20,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1318 transitions. [2021-08-21 16:53:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:53:20,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:20,929 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:20,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:21,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:21,130 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 122683459, now seen corresponding path program 81 times [2021-08-21 16:53:21,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:21,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319706816] [2021-08-21 16:53:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:21,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:21,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:21,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319706816] [2021-08-21 16:53:21,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319706816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:21,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728061594] [2021-08-21 16:53:21,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:53:21,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:21,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:21,336 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 16:53:25,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 16:53:25,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:53:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728061594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:25,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:25,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-21 16:53:25,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538670920] [2021-08-21 16:53:25,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:53:25,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:53:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:53:25,447 INFO L87 Difference]: Start difference. First operand 968 states and 1318 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:26,067 INFO L93 Difference]: Finished difference Result 2581 states and 3225 transitions. [2021-08-21 16:53:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:53:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:26,071 INFO L225 Difference]: With dead ends: 2581 [2021-08-21 16:53:26,071 INFO L226 Difference]: Without dead ends: 2419 [2021-08-21 16:53:26,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 16:53:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-08-21 16:53:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 976. [2021-08-21 16:53:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 968 states have (on average 1.3801652892561984) internal successors, (1336), 975 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1336 transitions. [2021-08-21 16:53:26,088 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1336 transitions. Word has length 110 [2021-08-21 16:53:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:26,088 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1336 transitions. [2021-08-21 16:53:26,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1336 transitions. [2021-08-21 16:53:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-21 16:53:26,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:26,090 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:26,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 16:53:26,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:26,309 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 165796319, now seen corresponding path program 82 times [2021-08-21 16:53:26,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:26,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849448756] [2021-08-21 16:53:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:26,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:26,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:26,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849448756] [2021-08-21 16:53:26,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849448756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:26,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987687756] [2021-08-21 16:53:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:53:26,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:26,512 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:26,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 16:53:30,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:53:30,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 16:53:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987687756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:30,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-21 16:53:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660828969] [2021-08-21 16:53:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:53:30,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:53:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:53:30,681 INFO L87 Difference]: Start difference. First operand 976 states and 1336 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:31,534 INFO L93 Difference]: Finished difference Result 2208 states and 2765 transitions. [2021-08-21 16:53:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:53:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 110 [2021-08-21 16:53:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:31,537 INFO L225 Difference]: With dead ends: 2208 [2021-08-21 16:53:31,537 INFO L226 Difference]: Without dead ends: 2005 [2021-08-21 16:53:31,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 16:53:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-08-21 16:53:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 783. [2021-08-21 16:53:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 775 states have (on average 1.3625806451612903) internal successors, (1056), 782 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1056 transitions. [2021-08-21 16:53:31,550 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1056 transitions. Word has length 110 [2021-08-21 16:53:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:31,550 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1056 transitions. [2021-08-21 16:53:31,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1056 transitions. [2021-08-21 16:53:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:53:31,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:31,551 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:31,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:31,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:31,752 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:31,752 INFO L82 PathProgramCache]: Analyzing trace with hash 267243186, now seen corresponding path program 83 times [2021-08-21 16:53:31,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:31,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582862725] [2021-08-21 16:53:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:31,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:32,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:32,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582862725] [2021-08-21 16:53:32,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582862725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:32,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901889970] [2021-08-21 16:53:32,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:53:32,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:32,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:32,048 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:32,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 16:53:35,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 16:53:35,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:53:35,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:36,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901889970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:36,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:36,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:53:36,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068010302] [2021-08-21 16:53:36,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:53:36,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:53:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:53:36,504 INFO L87 Difference]: Start difference. First operand 783 states and 1056 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:36,911 INFO L93 Difference]: Finished difference Result 1849 states and 2345 transitions. [2021-08-21 16:53:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:53:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:53:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:36,914 INFO L225 Difference]: With dead ends: 1849 [2021-08-21 16:53:36,914 INFO L226 Difference]: Without dead ends: 1699 [2021-08-21 16:53:36,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:53:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-08-21 16:53:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 788. [2021-08-21 16:53:36,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 780 states have (on average 1.3628205128205129) internal successors, (1063), 787 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 1063 transitions. [2021-08-21 16:53:36,923 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 1063 transitions. Word has length 115 [2021-08-21 16:53:36,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:36,923 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 1063 transitions. [2021-08-21 16:53:36,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 1063 transitions. [2021-08-21 16:53:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:53:36,924 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:36,924 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:36,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:37,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:37,125 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:37,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1711001780, now seen corresponding path program 84 times [2021-08-21 16:53:37,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:37,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220148721] [2021-08-21 16:53:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:37,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:37,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:37,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220148721] [2021-08-21 16:53:37,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220148721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:37,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987934726] [2021-08-21 16:53:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:53:37,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:37,419 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:37,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 16:53:41,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 16:53:41,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:53:41,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:41,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987934726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:41,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:41,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:53:41,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111724294] [2021-08-21 16:53:41,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:53:41,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:41,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:53:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:53:41,898 INFO L87 Difference]: Start difference. First operand 788 states and 1063 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:42,338 INFO L93 Difference]: Finished difference Result 2224 states and 2797 transitions. [2021-08-21 16:53:42,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:53:42,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:53:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:42,340 INFO L225 Difference]: With dead ends: 2224 [2021-08-21 16:53:42,341 INFO L226 Difference]: Without dead ends: 2074 [2021-08-21 16:53:42,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:53:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-08-21 16:53:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 818. [2021-08-21 16:53:42,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 810 states have (on average 1.3641975308641976) internal successors, (1105), 817 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:42,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1105 transitions. [2021-08-21 16:53:42,351 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1105 transitions. Word has length 115 [2021-08-21 16:53:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:42,351 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1105 transitions. [2021-08-21 16:53:42,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1105 transitions. [2021-08-21 16:53:42,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:53:42,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:42,352 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:42,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:42,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:42,553 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1249768138, now seen corresponding path program 85 times [2021-08-21 16:53:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:42,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385488954] [2021-08-21 16:53:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:42,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:42,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385488954] [2021-08-21 16:53:42,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385488954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:42,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014295400] [2021-08-21 16:53:42,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:53:42,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:42,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:42,825 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:42,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 16:53:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:46,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:53:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:47,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014295400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:47,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:47,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:53:47,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370161248] [2021-08-21 16:53:47,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:53:47,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:53:47,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:53:47,343 INFO L87 Difference]: Start difference. First operand 818 states and 1105 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:47,818 INFO L93 Difference]: Finished difference Result 2214 states and 2779 transitions. [2021-08-21 16:53:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:53:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:53:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:47,821 INFO L225 Difference]: With dead ends: 2214 [2021-08-21 16:53:47,821 INFO L226 Difference]: Without dead ends: 2064 [2021-08-21 16:53:47,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:53:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-08-21 16:53:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 848. [2021-08-21 16:53:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 840 states have (on average 1.3654761904761905) internal successors, (1147), 847 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1147 transitions. [2021-08-21 16:53:47,831 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1147 transitions. Word has length 115 [2021-08-21 16:53:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:47,831 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1147 transitions. [2021-08-21 16:53:47,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1147 transitions. [2021-08-21 16:53:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:53:47,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:47,833 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:47,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 16:53:48,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-21 16:53:48,033 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:48,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:48,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2112904136, now seen corresponding path program 86 times [2021-08-21 16:53:48,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:48,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149064784] [2021-08-21 16:53:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:48,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:48,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149064784] [2021-08-21 16:53:48,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149064784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:48,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287483926] [2021-08-21 16:53:48,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:53:48,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:48,300 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:48,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 16:53:52,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:53:52,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:52,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:53:52,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:52,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287483926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:52,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:52,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:53:52,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982961268] [2021-08-21 16:53:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:53:52,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:53:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:53:52,834 INFO L87 Difference]: Start difference. First operand 848 states and 1147 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:53,343 INFO L93 Difference]: Finished difference Result 2204 states and 2761 transitions. [2021-08-21 16:53:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:53:53,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:53:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:53,349 INFO L225 Difference]: With dead ends: 2204 [2021-08-21 16:53:53,349 INFO L226 Difference]: Without dead ends: 2054 [2021-08-21 16:53:53,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 545.4ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:53:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-08-21 16:53:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 878. [2021-08-21 16:53:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 870 states have (on average 1.3666666666666667) internal successors, (1189), 877 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1189 transitions. [2021-08-21 16:53:53,360 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1189 transitions. Word has length 115 [2021-08-21 16:53:53,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:53,360 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1189 transitions. [2021-08-21 16:53:53,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1189 transitions. [2021-08-21 16:53:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:53:53,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:53,361 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:53,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 16:53:53,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-21 16:53:53,562 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:53,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2120501830, now seen corresponding path program 87 times [2021-08-21 16:53:53,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:53,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272702161] [2021-08-21 16:53:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:53,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:53,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:53,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272702161] [2021-08-21 16:53:53,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272702161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:53,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359831552] [2021-08-21 16:53:53,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:53:53,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:53,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:53,905 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:53,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 16:53:58,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 16:53:58,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:53:58,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 16:53:58,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:53:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:58,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359831552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:58,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:53:58,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:53:58,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406149702] [2021-08-21 16:53:58,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:53:58,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:53:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:53:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:53:58,451 INFO L87 Difference]: Start difference. First operand 878 states and 1189 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:53:59,003 INFO L93 Difference]: Finished difference Result 2194 states and 2743 transitions. [2021-08-21 16:53:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:53:59,003 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:53:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:53:59,006 INFO L225 Difference]: With dead ends: 2194 [2021-08-21 16:53:59,006 INFO L226 Difference]: Without dead ends: 2044 [2021-08-21 16:53:59,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 579.2ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:53:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-08-21 16:53:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 908. [2021-08-21 16:53:59,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 900 states have (on average 1.3677777777777778) internal successors, (1231), 907 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1231 transitions. [2021-08-21 16:53:59,017 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1231 transitions. Word has length 115 [2021-08-21 16:53:59,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:53:59,017 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1231 transitions. [2021-08-21 16:53:59,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:53:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1231 transitions. [2021-08-21 16:53:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:53:59,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:53:59,018 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:53:59,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 16:53:59,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:59,219 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:53:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:53:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash -24813124, now seen corresponding path program 88 times [2021-08-21 16:53:59,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:53:59,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929873917] [2021-08-21 16:53:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:53:59,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:53:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:53:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:53:59,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:53:59,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929873917] [2021-08-21 16:53:59,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929873917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:53:59,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465187235] [2021-08-21 16:53:59,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:53:59,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:53:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:53:59,435 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:53:59,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 16:54:03,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:54:03,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:03,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:54:03,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:04,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465187235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:04,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:04,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:54:04,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353636384] [2021-08-21 16:54:04,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:04,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:04,047 INFO L87 Difference]: Start difference. First operand 908 states and 1231 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:04,690 INFO L93 Difference]: Finished difference Result 2184 states and 2725 transitions. [2021-08-21 16:54:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:54:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:54:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:04,693 INFO L225 Difference]: With dead ends: 2184 [2021-08-21 16:54:04,693 INFO L226 Difference]: Without dead ends: 2034 [2021-08-21 16:54:04,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:54:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-08-21 16:54:04,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 938. [2021-08-21 16:54:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 930 states have (on average 1.3688172043010753) internal successors, (1273), 937 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1273 transitions. [2021-08-21 16:54:04,707 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1273 transitions. Word has length 115 [2021-08-21 16:54:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:04,707 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1273 transitions. [2021-08-21 16:54:04,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1273 transitions. [2021-08-21 16:54:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:54:04,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:04,709 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:04,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 16:54:04,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:04,918 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1181497282, now seen corresponding path program 89 times [2021-08-21 16:54:04,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:04,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829846072] [2021-08-21 16:54:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:04,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:05,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:05,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829846072] [2021-08-21 16:54:05,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829846072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:05,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404194026] [2021-08-21 16:54:05,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:54:05,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:05,169 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:05,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 16:54:09,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 16:54:09,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:54:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:09,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404194026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:09,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:09,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:54:09,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821460520] [2021-08-21 16:54:09,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:09,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:09,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:09,912 INFO L87 Difference]: Start difference. First operand 938 states and 1273 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:10,540 INFO L93 Difference]: Finished difference Result 2174 states and 2707 transitions. [2021-08-21 16:54:10,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:54:10,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:54:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:10,543 INFO L225 Difference]: With dead ends: 2174 [2021-08-21 16:54:10,543 INFO L226 Difference]: Without dead ends: 2024 [2021-08-21 16:54:10,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:54:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-08-21 16:54:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 968. [2021-08-21 16:54:10,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 960 states have (on average 1.3697916666666667) internal successors, (1315), 967 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1315 transitions. [2021-08-21 16:54:10,555 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1315 transitions. Word has length 115 [2021-08-21 16:54:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:10,555 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 1315 transitions. [2021-08-21 16:54:10,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1315 transitions. [2021-08-21 16:54:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:54:10,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:10,557 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:10,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 16:54:10,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:10,757 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1274415424, now seen corresponding path program 90 times [2021-08-21 16:54:10,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:10,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731038263] [2021-08-21 16:54:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:10,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:10,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:10,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731038263] [2021-08-21 16:54:10,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731038263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:10,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455968911] [2021-08-21 16:54:10,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:54:10,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:10,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:10,969 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:10,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 16:54:15,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 16:54:15,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:15,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:54:15,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:15,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455968911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:15,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:15,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:54:15,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346286232] [2021-08-21 16:54:15,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:15,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:15,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:15,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:15,616 INFO L87 Difference]: Start difference. First operand 968 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:16,300 INFO L93 Difference]: Finished difference Result 2660 states and 3342 transitions. [2021-08-21 16:54:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 16:54:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:54:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:16,304 INFO L225 Difference]: With dead ends: 2660 [2021-08-21 16:54:16,304 INFO L226 Difference]: Without dead ends: 2455 [2021-08-21 16:54:16,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 16:54:16,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-08-21 16:54:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1001. [2021-08-21 16:54:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 993 states have (on average 1.3776435045317221) internal successors, (1368), 1000 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1368 transitions. [2021-08-21 16:54:16,317 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1368 transitions. Word has length 115 [2021-08-21 16:54:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:16,317 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1368 transitions. [2021-08-21 16:54:16,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1368 transitions. [2021-08-21 16:54:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 16:54:16,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:16,318 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:16,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 16:54:16,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:16,520 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1317528284, now seen corresponding path program 91 times [2021-08-21 16:54:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:16,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700212480] [2021-08-21 16:54:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:16,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:16,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:16,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700212480] [2021-08-21 16:54:16,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700212480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:16,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080310383] [2021-08-21 16:54:16,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:54:16,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:16,731 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:16,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 16:54:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 16:54:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:21,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080310383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:21,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:21,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-21 16:54:21,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958471224] [2021-08-21 16:54:21,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:21,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:21,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:21,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:21,359 INFO L87 Difference]: Start difference. First operand 1001 states and 1368 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:22,150 INFO L93 Difference]: Finished difference Result 2077 states and 2577 transitions. [2021-08-21 16:54:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:54:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-08-21 16:54:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:22,153 INFO L225 Difference]: With dead ends: 2077 [2021-08-21 16:54:22,153 INFO L226 Difference]: Without dead ends: 1954 [2021-08-21 16:54:22,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 752.8ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 16:54:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-08-21 16:54:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1018. [2021-08-21 16:54:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1010 states have (on average 1.3683168316831684) internal successors, (1382), 1017 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1382 transitions. [2021-08-21 16:54:22,165 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1382 transitions. Word has length 115 [2021-08-21 16:54:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:22,165 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1382 transitions. [2021-08-21 16:54:22,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1382 transitions. [2021-08-21 16:54:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:22,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:22,166 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:22,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 16:54:22,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 16:54:22,368 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1503193324, now seen corresponding path program 92 times [2021-08-21 16:54:22,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:22,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145275238] [2021-08-21 16:54:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:22,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:22,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:22,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145275238] [2021-08-21 16:54:22,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145275238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:22,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5675742] [2021-08-21 16:54:22,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:54:22,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:22,702 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:22,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 16:54:27,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:54:27,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:54:27,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:27,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5675742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:27,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:27,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-08-21 16:54:27,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734451494] [2021-08-21 16:54:27,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 16:54:27,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 16:54:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-08-21 16:54:27,731 INFO L87 Difference]: Start difference. First operand 1018 states and 1382 transitions. Second operand has 26 states, 26 states have (on average 5.461538461538462) internal successors, (142), 26 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:28,203 INFO L93 Difference]: Finished difference Result 1942 states and 2519 transitions. [2021-08-21 16:54:28,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:54:28,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.461538461538462) internal successors, (142), 26 states have internal predecessors, (142), 0 states have call successors, (0), 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 120 [2021-08-21 16:54:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:28,206 INFO L225 Difference]: With dead ends: 1942 [2021-08-21 16:54:28,206 INFO L226 Difference]: Without dead ends: 1752 [2021-08-21 16:54:28,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:54:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-08-21 16:54:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1063. [2021-08-21 16:54:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1055 states have (on average 1.371563981042654) internal successors, (1447), 1062 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1447 transitions. [2021-08-21 16:54:28,216 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1447 transitions. Word has length 120 [2021-08-21 16:54:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:28,216 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1447 transitions. [2021-08-21 16:54:28,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.461538461538462) internal successors, (142), 26 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1447 transitions. [2021-08-21 16:54:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:28,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:28,218 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:28,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 16:54:28,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 16:54:28,418 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:28,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1744478254, now seen corresponding path program 93 times [2021-08-21 16:54:28,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:28,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917736776] [2021-08-21 16:54:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:28,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:28,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:28,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917736776] [2021-08-21 16:54:28,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917736776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:28,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666919600] [2021-08-21 16:54:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:54:28,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:28,727 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:28,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 16:54:33,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 16:54:33,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:54:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:33,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666919600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:33,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:33,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:54:33,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937623925] [2021-08-21 16:54:33,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:33,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:33,840 INFO L87 Difference]: Start difference. First operand 1063 states and 1447 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:34,223 INFO L93 Difference]: Finished difference Result 2599 states and 3305 transitions. [2021-08-21 16:54:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:54:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:54:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:34,227 INFO L225 Difference]: With dead ends: 2599 [2021-08-21 16:54:34,227 INFO L226 Difference]: Without dead ends: 2449 [2021-08-21 16:54:34,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:54:34,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-08-21 16:54:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1058. [2021-08-21 16:54:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:54:34,241 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:54:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:34,242 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:54:34,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:54:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:34,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:34,243 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:34,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 16:54:34,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 16:54:34,443 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:34,444 INFO L82 PathProgramCache]: Analyzing trace with hash -796116282, now seen corresponding path program 94 times [2021-08-21 16:54:34,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:34,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547289695] [2021-08-21 16:54:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:34,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:34,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:34,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547289695] [2021-08-21 16:54:34,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547289695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:34,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108636715] [2021-08-21 16:54:34,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:54:34,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:34,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:34,744 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:34,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 16:54:39,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:54:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:54:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:39,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108636715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:39,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:39,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:54:39,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680673958] [2021-08-21 16:54:39,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:39,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:39,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:39,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:39,906 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:40,330 INFO L93 Difference]: Finished difference Result 2564 states and 3250 transitions. [2021-08-21 16:54:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:54:40,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:54:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:40,338 INFO L225 Difference]: With dead ends: 2564 [2021-08-21 16:54:40,338 INFO L226 Difference]: Without dead ends: 2414 [2021-08-21 16:54:40,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 16:54:40,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-08-21 16:54:40,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1058. [2021-08-21 16:54:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:54:40,351 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:54:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:40,351 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:54:40,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:54:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:40,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:40,352 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:40,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 16:54:40,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 16:54:40,553 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:40,553 INFO L82 PathProgramCache]: Analyzing trace with hash 647642312, now seen corresponding path program 95 times [2021-08-21 16:54:40,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:40,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031916654] [2021-08-21 16:54:40,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:40,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:40,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:40,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031916654] [2021-08-21 16:54:40,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031916654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:40,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549356273] [2021-08-21 16:54:40,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:54:40,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:40,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:40,837 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:40,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 16:54:45,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 16:54:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:45,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:54:45,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:46,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549356273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:46,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:46,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:54:46,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656572520] [2021-08-21 16:54:46,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:46,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:46,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:46,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:46,007 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:46,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:46,465 INFO L93 Difference]: Finished difference Result 2524 states and 3190 transitions. [2021-08-21 16:54:46,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:54:46,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:54:46,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:46,468 INFO L225 Difference]: With dead ends: 2524 [2021-08-21 16:54:46,468 INFO L226 Difference]: Without dead ends: 2374 [2021-08-21 16:54:46,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 495.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:54:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-08-21 16:54:46,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 1058. [2021-08-21 16:54:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:54:46,481 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:54:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:46,481 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:54:46,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:54:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:46,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:46,482 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:46,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 16:54:46,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 16:54:46,683 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:46,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:46,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1981839690, now seen corresponding path program 96 times [2021-08-21 16:54:46,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:46,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37030912] [2021-08-21 16:54:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:46,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:47,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:47,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37030912] [2021-08-21 16:54:47,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37030912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:47,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010369458] [2021-08-21 16:54:47,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:54:47,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:47,055 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:47,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 16:54:51,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 16:54:51,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:54:51,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:54:51,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:52,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010369458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:52,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:52,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:54:52,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036349463] [2021-08-21 16:54:52,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:52,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:52,256 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:52,762 INFO L93 Difference]: Finished difference Result 2484 states and 3130 transitions. [2021-08-21 16:54:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:54:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:54:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:52,765 INFO L225 Difference]: With dead ends: 2484 [2021-08-21 16:54:52,765 INFO L226 Difference]: Without dead ends: 2334 [2021-08-21 16:54:52,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:54:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-08-21 16:54:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1058. [2021-08-21 16:54:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:54:52,776 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:54:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:52,776 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:54:52,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:54:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:52,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:52,777 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:52,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 16:54:52,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:52,978 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:52,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:52,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1118703692, now seen corresponding path program 97 times [2021-08-21 16:54:52,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:52,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349754085] [2021-08-21 16:54:52,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:52,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:53,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:53,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349754085] [2021-08-21 16:54:53,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349754085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:53,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042110627] [2021-08-21 16:54:53,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:54:53,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:53,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:53,251 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:53,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 16:54:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:58,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:54:58,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:54:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:58,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042110627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:58,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:54:58,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:54:58,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744911950] [2021-08-21 16:54:58,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:54:58,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:54:58,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:54:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:54:58,555 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:54:59,120 INFO L93 Difference]: Finished difference Result 2444 states and 3070 transitions. [2021-08-21 16:54:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:54:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:54:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:54:59,123 INFO L225 Difference]: With dead ends: 2444 [2021-08-21 16:54:59,123 INFO L226 Difference]: Without dead ends: 2294 [2021-08-21 16:54:59,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:54:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-08-21 16:54:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1058. [2021-08-21 16:54:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:54:59,136 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:54:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:54:59,136 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:54:59,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:54:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:54:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:54:59,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:54:59,137 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:54:59,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 16:54:59,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:59,339 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:54:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:54:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1111105998, now seen corresponding path program 98 times [2021-08-21 16:54:59,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:54:59,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705194885] [2021-08-21 16:54:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:54:59,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:54:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:54:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:54:59,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:54:59,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705194885] [2021-08-21 16:54:59,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705194885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:54:59,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361206039] [2021-08-21 16:54:59,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:54:59,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:54:59,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:54:59,619 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:54:59,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 16:55:04,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:55:04,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:55:04,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:05,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361206039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:05,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:05,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:55:05,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718678603] [2021-08-21 16:55:05,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:55:05,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:55:05,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:55:05,203 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:05,851 INFO L93 Difference]: Finished difference Result 2404 states and 3010 transitions. [2021-08-21 16:55:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:55:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:55:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:05,854 INFO L225 Difference]: With dead ends: 2404 [2021-08-21 16:55:05,854 INFO L226 Difference]: Without dead ends: 2254 [2021-08-21 16:55:05,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:55:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-08-21 16:55:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1058. [2021-08-21 16:55:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:55:05,870 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:55:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:05,870 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:55:05,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:55:05,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:55:05,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:05,871 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:05,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 16:55:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 16:55:06,077 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:06,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1088172592, now seen corresponding path program 99 times [2021-08-21 16:55:06,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:06,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781359724] [2021-08-21 16:55:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:06,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:06,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:06,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781359724] [2021-08-21 16:55:06,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781359724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:06,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134181348] [2021-08-21 16:55:06,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:55:06,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:06,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:06,396 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:06,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 16:55:11,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 16:55:11,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:11,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 16:55:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:11,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134181348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:11,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:55:11,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85210238] [2021-08-21 16:55:11,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:55:11,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:55:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:55:11,838 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:12,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:12,527 INFO L93 Difference]: Finished difference Result 2364 states and 2950 transitions. [2021-08-21 16:55:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:55:12,527 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:55:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:12,530 INFO L225 Difference]: With dead ends: 2364 [2021-08-21 16:55:12,530 INFO L226 Difference]: Without dead ends: 2214 [2021-08-21 16:55:12,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:55:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-08-21 16:55:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1058. [2021-08-21 16:55:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:55:12,545 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:55:12,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:12,545 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:55:12,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:55:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:55:12,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:12,547 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:12,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 16:55:12,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 16:55:12,747 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2050110546, now seen corresponding path program 100 times [2021-08-21 16:55:12,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:12,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166885808] [2021-08-21 16:55:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:12,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:12,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:12,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166885808] [2021-08-21 16:55:12,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166885808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:12,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396615823] [2021-08-21 16:55:12,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:55:12,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:12,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:13,000 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:13,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 16:55:18,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:55:18,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:55:18,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:18,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396615823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:18,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:18,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:55:18,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699778489] [2021-08-21 16:55:18,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:55:18,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:55:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:55:18,477 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:19,212 INFO L93 Difference]: Finished difference Result 2324 states and 2890 transitions. [2021-08-21 16:55:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:55:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:55:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:19,214 INFO L225 Difference]: With dead ends: 2324 [2021-08-21 16:55:19,214 INFO L226 Difference]: Without dead ends: 2174 [2021-08-21 16:55:19,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:55:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-08-21 16:55:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1058. [2021-08-21 16:55:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1050 states have (on average 1.3733333333333333) internal successors, (1442), 1057 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1442 transitions. [2021-08-21 16:55:19,227 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1442 transitions. Word has length 120 [2021-08-21 16:55:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:19,227 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 1442 transitions. [2021-08-21 16:55:19,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1442 transitions. [2021-08-21 16:55:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:55:19,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:19,228 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:19,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 16:55:19,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:19,429 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 211055956, now seen corresponding path program 101 times [2021-08-21 16:55:19,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:19,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008782015] [2021-08-21 16:55:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:19,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:19,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:19,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008782015] [2021-08-21 16:55:19,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008782015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:19,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171566511] [2021-08-21 16:55:19,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:55:19,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:19,656 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:19,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 16:55:24,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 16:55:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 16:55:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171566511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:25,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-21 16:55:25,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295616250] [2021-08-21 16:55:25,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:55:25,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:55:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:55:25,157 INFO L87 Difference]: Start difference. First operand 1058 states and 1442 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:25,896 INFO L93 Difference]: Finished difference Result 2834 states and 3552 transitions. [2021-08-21 16:55:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 16:55:25,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-08-21 16:55:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:25,899 INFO L225 Difference]: With dead ends: 2834 [2021-08-21 16:55:25,899 INFO L226 Difference]: Without dead ends: 2629 [2021-08-21 16:55:25,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=1029, Invalid=2631, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 16:55:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-08-21 16:55:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1070. [2021-08-21 16:55:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1062 states have (on average 1.3822975517890772) internal successors, (1468), 1069 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1468 transitions. [2021-08-21 16:55:25,914 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1468 transitions. Word has length 120 [2021-08-21 16:55:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:25,914 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1468 transitions. [2021-08-21 16:55:25,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1468 transitions. [2021-08-21 16:55:25,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-08-21 16:55:25,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:25,915 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:25,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 16:55:26,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:26,116 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash 254168816, now seen corresponding path program 102 times [2021-08-21 16:55:26,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:26,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742161078] [2021-08-21 16:55:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:26,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:26,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:26,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742161078] [2021-08-21 16:55:26,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742161078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:26,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186719955] [2021-08-21 16:55:26,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:55:26,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:26,377 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:26,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 16:55:31,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 16:55:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:55:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:31,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186719955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:31,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:31,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-08-21 16:55:31,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099040781] [2021-08-21 16:55:31,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:55:31,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:55:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:55:31,834 INFO L87 Difference]: Start difference. First operand 1070 states and 1468 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:32,670 INFO L93 Difference]: Finished difference Result 2236 states and 2777 transitions. [2021-08-21 16:55:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:55:32,670 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-08-21 16:55:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:32,673 INFO L225 Difference]: With dead ends: 2236 [2021-08-21 16:55:32,673 INFO L226 Difference]: Without dead ends: 2113 [2021-08-21 16:55:32,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=963, Invalid=2819, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 16:55:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-08-21 16:55:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 847. [2021-08-21 16:55:32,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 839 states have (on average 1.365911799761621) internal successors, (1146), 846 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:32,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1146 transitions. [2021-08-21 16:55:32,684 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1146 transitions. Word has length 120 [2021-08-21 16:55:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:32,684 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1146 transitions. [2021-08-21 16:55:32,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1146 transitions. [2021-08-21 16:55:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:55:32,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:32,685 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:32,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 16:55:32,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 16:55:32,886 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:32,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1181744127, now seen corresponding path program 103 times [2021-08-21 16:55:32,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:32,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378344727] [2021-08-21 16:55:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:32,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:33,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:33,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378344727] [2021-08-21 16:55:33,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378344727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:33,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105180254] [2021-08-21 16:55:33,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:55:33,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:33,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:33,207 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:33,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 16:55:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:55:38,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:38,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105180254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:38,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:38,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:55:38,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380711972] [2021-08-21 16:55:38,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:55:38,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:55:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:55:38,970 INFO L87 Difference]: Start difference. First operand 847 states and 1146 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:39,411 INFO L93 Difference]: Finished difference Result 2013 states and 2555 transitions. [2021-08-21 16:55:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:55:39,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:55:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:39,414 INFO L225 Difference]: With dead ends: 2013 [2021-08-21 16:55:39,414 INFO L226 Difference]: Without dead ends: 1863 [2021-08-21 16:55:39,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 502.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:55:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-08-21 16:55:39,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 852. [2021-08-21 16:55:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 844 states have (on average 1.3661137440758293) internal successors, (1153), 851 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1153 transitions. [2021-08-21 16:55:39,424 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1153 transitions. Word has length 125 [2021-08-21 16:55:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:39,424 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1153 transitions. [2021-08-21 16:55:39,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1153 transitions. [2021-08-21 16:55:39,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:55:39,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:39,425 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:39,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 16:55:39,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 16:55:39,625 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:39,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:39,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1229777795, now seen corresponding path program 104 times [2021-08-21 16:55:39,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:39,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004194777] [2021-08-21 16:55:39,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:39,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:40,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:40,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004194777] [2021-08-21 16:55:40,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004194777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:40,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578484908] [2021-08-21 16:55:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:55:40,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:40,067 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:40,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 16:55:45,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:55:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:55:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:45,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578484908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:45,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:45,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:55:45,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696707556] [2021-08-21 16:55:45,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:55:45,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:45,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:55:45,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:55:45,873 INFO L87 Difference]: Start difference. First operand 852 states and 1153 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:46,352 INFO L93 Difference]: Finished difference Result 2438 states and 3067 transitions. [2021-08-21 16:55:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:55:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:55:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:46,355 INFO L225 Difference]: With dead ends: 2438 [2021-08-21 16:55:46,355 INFO L226 Difference]: Without dead ends: 2288 [2021-08-21 16:55:46,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 16:55:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-08-21 16:55:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 882. [2021-08-21 16:55:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 874 states have (on average 1.3672768878718535) internal successors, (1195), 881 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1195 transitions. [2021-08-21 16:55:46,366 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1195 transitions. Word has length 125 [2021-08-21 16:55:46,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:46,367 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1195 transitions. [2021-08-21 16:55:46,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1195 transitions. [2021-08-21 16:55:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:55:46,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:46,368 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:46,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 16:55:46,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 16:55:46,568 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1621430907, now seen corresponding path program 105 times [2021-08-21 16:55:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:46,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112007900] [2021-08-21 16:55:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:46,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:46,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:46,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112007900] [2021-08-21 16:55:46,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112007900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:46,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196050906] [2021-08-21 16:55:46,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:55:46,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:46,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:46,903 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:46,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 16:55:52,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 16:55:52,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 16:55:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:52,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196050906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:52,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:52,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:55:52,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613477029] [2021-08-21 16:55:52,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:55:52,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:55:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:55:52,834 INFO L87 Difference]: Start difference. First operand 882 states and 1195 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:55:53,441 INFO L93 Difference]: Finished difference Result 2428 states and 3049 transitions. [2021-08-21 16:55:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:55:53,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:55:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:55:53,444 INFO L225 Difference]: With dead ends: 2428 [2021-08-21 16:55:53,444 INFO L226 Difference]: Without dead ends: 2278 [2021-08-21 16:55:53,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 615.9ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 16:55:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-08-21 16:55:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 912. [2021-08-21 16:55:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 904 states have (on average 1.3683628318584071) internal successors, (1237), 911 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1237 transitions. [2021-08-21 16:55:53,457 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1237 transitions. Word has length 125 [2021-08-21 16:55:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:55:53,457 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1237 transitions. [2021-08-21 16:55:53,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:55:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1237 transitions. [2021-08-21 16:55:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:55:53,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:55:53,458 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:55:53,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 16:55:53,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:53,659 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:55:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:55:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash -287233529, now seen corresponding path program 106 times [2021-08-21 16:55:53,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:55:53,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628147446] [2021-08-21 16:55:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:55:53,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:55:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:55:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:53,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:55:53,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628147446] [2021-08-21 16:55:53,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628147446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:53,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636405661] [2021-08-21 16:55:53,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:55:53,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:55:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:55:53,994 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:55:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 16:55:59,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:55:59,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:55:59,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:55:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:55:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:55:59,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636405661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:55:59,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:55:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:55:59,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425617293] [2021-08-21 16:55:59,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:55:59,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:55:59,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:55:59,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:55:59,939 INFO L87 Difference]: Start difference. First operand 912 states and 1237 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:00,516 INFO L93 Difference]: Finished difference Result 2418 states and 3031 transitions. [2021-08-21 16:56:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:56:00,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:00,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:00,519 INFO L225 Difference]: With dead ends: 2418 [2021-08-21 16:56:00,519 INFO L226 Difference]: Without dead ends: 2268 [2021-08-21 16:56:00,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 16:56:00,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2021-08-21 16:56:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 942. [2021-08-21 16:56:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 934 states have (on average 1.3693790149892933) internal successors, (1279), 941 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:00,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1279 transitions. [2021-08-21 16:56:00,530 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1279 transitions. Word has length 125 [2021-08-21 16:56:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:00,530 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1279 transitions. [2021-08-21 16:56:00,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1279 transitions. [2021-08-21 16:56:00,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:56:00,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:00,531 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:00,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 16:56:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 16:56:00,732 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:00,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1150369527, now seen corresponding path program 107 times [2021-08-21 16:56:00,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:00,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177046702] [2021-08-21 16:56:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:00,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:01,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:01,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177046702] [2021-08-21 16:56:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177046702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:01,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240708643] [2021-08-21 16:56:01,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:56:01,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:01,060 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:01,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 16:56:06,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 16:56:06,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:06,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:56:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:07,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240708643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:07,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:07,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:56:07,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811733481] [2021-08-21 16:56:07,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:56:07,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:56:07,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:56:07,020 INFO L87 Difference]: Start difference. First operand 942 states and 1279 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:07,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:07,676 INFO L93 Difference]: Finished difference Result 2408 states and 3013 transitions. [2021-08-21 16:56:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:56:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:07,680 INFO L225 Difference]: With dead ends: 2408 [2021-08-21 16:56:07,680 INFO L226 Difference]: Without dead ends: 2258 [2021-08-21 16:56:07,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 665.9ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 16:56:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-08-21 16:56:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 972. [2021-08-21 16:56:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 964 states have (on average 1.370331950207469) internal successors, (1321), 971 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1321 transitions. [2021-08-21 16:56:07,698 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1321 transitions. Word has length 125 [2021-08-21 16:56:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:07,699 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1321 transitions. [2021-08-21 16:56:07,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1321 transitions. [2021-08-21 16:56:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:56:07,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:07,701 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:07,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 16:56:07,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 16:56:07,909 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1157967221, now seen corresponding path program 108 times [2021-08-21 16:56:07,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:07,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897296212] [2021-08-21 16:56:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:07,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:08,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:08,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897296212] [2021-08-21 16:56:08,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897296212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:08,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804794710] [2021-08-21 16:56:08,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:56:08,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:08,187 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:08,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 16:56:13,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 16:56:13,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:13,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:56:13,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:14,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804794710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:14,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:14,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:56:14,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431652313] [2021-08-21 16:56:14,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:56:14,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:56:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:56:14,239 INFO L87 Difference]: Start difference. First operand 972 states and 1321 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:14,932 INFO L93 Difference]: Finished difference Result 2398 states and 2995 transitions. [2021-08-21 16:56:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:56:14,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:14,934 INFO L225 Difference]: With dead ends: 2398 [2021-08-21 16:56:14,934 INFO L226 Difference]: Without dead ends: 2248 [2021-08-21 16:56:14,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:56:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-08-21 16:56:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1002. [2021-08-21 16:56:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 994 states have (on average 1.3712273641851107) internal successors, (1363), 1001 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:14,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1363 transitions. [2021-08-21 16:56:14,947 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1363 transitions. Word has length 125 [2021-08-21 16:56:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:14,947 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1363 transitions. [2021-08-21 16:56:14,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1363 transitions. [2021-08-21 16:56:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:56:14,948 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:14,948 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:14,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 16:56:15,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 16:56:15,149 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash 937721485, now seen corresponding path program 109 times [2021-08-21 16:56:15,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:15,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587754052] [2021-08-21 16:56:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:15,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:15,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:15,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587754052] [2021-08-21 16:56:15,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587754052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:15,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953650237] [2021-08-21 16:56:15,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:56:15,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:15,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:15,463 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:15,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 16:56:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:21,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:56:21,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:21,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953650237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:21,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:21,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:56:21,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490027364] [2021-08-21 16:56:21,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:56:21,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:56:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:56:21,574 INFO L87 Difference]: Start difference. First operand 1002 states and 1363 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:22,289 INFO L93 Difference]: Finished difference Result 2388 states and 2977 transitions. [2021-08-21 16:56:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:56:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:22,292 INFO L225 Difference]: With dead ends: 2388 [2021-08-21 16:56:22,292 INFO L226 Difference]: Without dead ends: 2238 [2021-08-21 16:56:22,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 16:56:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-08-21 16:56:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1032. [2021-08-21 16:56:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1024 states have (on average 1.3720703125) internal successors, (1405), 1031 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1405 transitions. [2021-08-21 16:56:22,306 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1405 transitions. Word has length 125 [2021-08-21 16:56:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:22,306 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1405 transitions. [2021-08-21 16:56:22,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1405 transitions. [2021-08-21 16:56:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:56:22,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:22,307 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:22,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 16:56:22,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 16:56:22,508 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash -218962673, now seen corresponding path program 110 times [2021-08-21 16:56:22,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:22,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774347950] [2021-08-21 16:56:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:22,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:22,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:22,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774347950] [2021-08-21 16:56:22,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774347950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:22,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278104760] [2021-08-21 16:56:22,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:56:22,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:22,851 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:22,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 16:56:28,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:56:28,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:28,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:56:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:28,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278104760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:28,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:28,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:56:28,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540595597] [2021-08-21 16:56:28,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:56:28,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:28,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:56:28,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:56:28,836 INFO L87 Difference]: Start difference. First operand 1032 states and 1405 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:29,528 INFO L93 Difference]: Finished difference Result 2378 states and 2959 transitions. [2021-08-21 16:56:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:56:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:29,531 INFO L225 Difference]: With dead ends: 2378 [2021-08-21 16:56:29,531 INFO L226 Difference]: Without dead ends: 2228 [2021-08-21 16:56:29,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 16:56:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-08-21 16:56:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1062. [2021-08-21 16:56:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1054 states have (on average 1.372865275142315) internal successors, (1447), 1061 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1447 transitions. [2021-08-21 16:56:29,544 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1447 transitions. Word has length 125 [2021-08-21 16:56:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:29,544 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1447 transitions. [2021-08-21 16:56:29,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1447 transitions. [2021-08-21 16:56:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:56:29,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:29,545 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:29,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 16:56:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:29,746 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:29,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2058017263, now seen corresponding path program 111 times [2021-08-21 16:56:29,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:29,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720104129] [2021-08-21 16:56:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:29,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:30,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:30,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720104129] [2021-08-21 16:56:30,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720104129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:30,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77997528] [2021-08-21 16:56:30,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:56:30,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:30,090 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:30,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 16:56:35,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 16:56:35,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:56:35,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:36,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77997528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:36,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:36,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-21 16:56:36,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38480721] [2021-08-21 16:56:36,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 16:56:36,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 16:56:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:56:36,040 INFO L87 Difference]: Start difference. First operand 1062 states and 1447 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:36,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:36,795 INFO L93 Difference]: Finished difference Result 2815 states and 3519 transitions. [2021-08-21 16:56:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 16:56:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:36,798 INFO L225 Difference]: With dead ends: 2815 [2021-08-21 16:56:36,798 INFO L226 Difference]: Without dead ends: 2653 [2021-08-21 16:56:36,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 708.2ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 16:56:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-08-21 16:56:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 1095. [2021-08-21 16:56:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1087 states have (on average 1.3799448022079117) internal successors, (1500), 1094 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1500 transitions. [2021-08-21 16:56:36,816 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1500 transitions. Word has length 125 [2021-08-21 16:56:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:36,816 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1500 transitions. [2021-08-21 16:56:36,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1500 transitions. [2021-08-21 16:56:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-21 16:56:36,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:36,817 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:36,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 16:56:37,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:37,018 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2014904403, now seen corresponding path program 112 times [2021-08-21 16:56:37,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:37,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219417868] [2021-08-21 16:56:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:37,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:37,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:37,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219417868] [2021-08-21 16:56:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219417868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:37,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11671906] [2021-08-21 16:56:37,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:56:37,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:37,367 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:37,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 16:56:43,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:56:43,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:43,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-21 16:56:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:43,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11671906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:43,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:43,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-08-21 16:56:43,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300060829] [2021-08-21 16:56:43,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:56:43,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:56:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:56:43,484 INFO L87 Difference]: Start difference. First operand 1095 states and 1500 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:44,387 INFO L93 Difference]: Finished difference Result 2281 states and 2829 transitions. [2021-08-21 16:56:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 16:56:44,388 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-08-21 16:56:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:44,390 INFO L225 Difference]: With dead ends: 2281 [2021-08-21 16:56:44,390 INFO L226 Difference]: Without dead ends: 2158 [2021-08-21 16:56:44,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 894.0ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 16:56:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-08-21 16:56:44,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 842. [2021-08-21 16:56:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 834 states have (on average 1.3621103117505995) internal successors, (1136), 841 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1136 transitions. [2021-08-21 16:56:44,402 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1136 transitions. Word has length 125 [2021-08-21 16:56:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:44,402 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1136 transitions. [2021-08-21 16:56:44,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1136 transitions. [2021-08-21 16:56:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:56:44,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:44,403 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:44,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 16:56:44,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:44,605 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:44,605 INFO L82 PathProgramCache]: Analyzing trace with hash 527637947, now seen corresponding path program 113 times [2021-08-21 16:56:44,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:44,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381564485] [2021-08-21 16:56:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:44,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:45,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:45,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381564485] [2021-08-21 16:56:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381564485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:45,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303834741] [2021-08-21 16:56:45,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:56:45,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:45,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:45,004 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:45,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 16:56:50,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 16:56:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:56:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:51,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303834741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:51,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:51,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-08-21 16:56:51,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231107171] [2021-08-21 16:56:51,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 16:56:51,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 16:56:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:56:51,410 INFO L87 Difference]: Start difference. First operand 842 states and 1136 transitions. Second operand has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 28 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:51,953 INFO L93 Difference]: Finished difference Result 1806 states and 2323 transitions. [2021-08-21 16:56:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 16:56:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 28 states have internal predecessors, (152), 0 states have call successors, (0), 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 130 [2021-08-21 16:56:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:51,955 INFO L225 Difference]: With dead ends: 1806 [2021-08-21 16:56:51,955 INFO L226 Difference]: Without dead ends: 1616 [2021-08-21 16:56:51,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 636.9ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:56:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-08-21 16:56:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 887. [2021-08-21 16:56:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 879 states have (on average 1.366325369738339) internal successors, (1201), 886 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1201 transitions. [2021-08-21 16:56:51,963 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1201 transitions. Word has length 130 [2021-08-21 16:56:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:51,964 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1201 transitions. [2021-08-21 16:56:51,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 28 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1201 transitions. [2021-08-21 16:56:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:56:51,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:51,965 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:52,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 16:56:52,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:52,169 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:52,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:52,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1992076577, now seen corresponding path program 114 times [2021-08-21 16:56:52,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:52,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438778060] [2021-08-21 16:56:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:52,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:56:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:52,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:56:52,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438778060] [2021-08-21 16:56:52,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438778060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:52,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853811498] [2021-08-21 16:56:52,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:56:52,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:56:52,520 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:56:52,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 16:56:58,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 16:56:58,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:56:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:56:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:56:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:56:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853811498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:56:59,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:56:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:56:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530890850] [2021-08-21 16:56:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:56:59,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:56:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:56:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:56:59,049 INFO L87 Difference]: Start difference. First operand 887 states and 1201 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:59,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:56:59,520 INFO L93 Difference]: Finished difference Result 2598 states and 3270 transitions. [2021-08-21 16:56:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:56:59,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:56:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:56:59,523 INFO L225 Difference]: With dead ends: 2598 [2021-08-21 16:56:59,524 INFO L226 Difference]: Without dead ends: 2448 [2021-08-21 16:56:59,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:56:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-21 16:56:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 887. [2021-08-21 16:56:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 879 states have (on average 1.3686006825938566) internal successors, (1203), 886 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1203 transitions. [2021-08-21 16:56:59,535 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1203 transitions. Word has length 130 [2021-08-21 16:56:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:56:59,535 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1203 transitions. [2021-08-21 16:56:59,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:56:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1203 transitions. [2021-08-21 16:56:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:56:59,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:56:59,536 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:56:59,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 16:56:59,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:56:59,737 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:56:59,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:56:59,737 INFO L82 PathProgramCache]: Analyzing trace with hash -369793259, now seen corresponding path program 115 times [2021-08-21 16:56:59,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:56:59,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201987892] [2021-08-21 16:56:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:56:59,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:56:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:00,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:00,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201987892] [2021-08-21 16:57:00,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201987892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:00,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534837187] [2021-08-21 16:57:00,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:57:00,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:00,059 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:00,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 16:57:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:57:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:06,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534837187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:06,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:06,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:06,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336886659] [2021-08-21 16:57:06,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:06,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:06,631 INFO L87 Difference]: Start difference. First operand 887 states and 1203 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:07,109 INFO L93 Difference]: Finished difference Result 2593 states and 3257 transitions. [2021-08-21 16:57:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:57:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:07,112 INFO L225 Difference]: With dead ends: 2593 [2021-08-21 16:57:07,113 INFO L226 Difference]: Without dead ends: 2443 [2021-08-21 16:57:07,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 543.2ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:57:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-08-21 16:57:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 917. [2021-08-21 16:57:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 909 states have (on average 1.3696369636963697) internal successors, (1245), 916 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1245 transitions. [2021-08-21 16:57:07,126 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1245 transitions. Word has length 130 [2021-08-21 16:57:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:07,126 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1245 transitions. [2021-08-21 16:57:07,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1245 transitions. [2021-08-21 16:57:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:07,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:07,127 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:07,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 16:57:07,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 16:57:07,328 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2041728663, now seen corresponding path program 116 times [2021-08-21 16:57:07,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:07,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501454261] [2021-08-21 16:57:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:07,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:07,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:07,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501454261] [2021-08-21 16:57:07,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501454261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:07,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167893003] [2021-08-21 16:57:07,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:57:07,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:07,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:07,690 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:07,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 16:57:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:57:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:57:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:57:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:14,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167893003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:14,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:14,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:14,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814477891] [2021-08-21 16:57:14,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:14,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:14,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:14,278 INFO L87 Difference]: Start difference. First operand 917 states and 1245 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:14,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:14,791 INFO L93 Difference]: Finished difference Result 2583 states and 3239 transitions. [2021-08-21 16:57:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:57:14,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:14,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:14,794 INFO L225 Difference]: With dead ends: 2583 [2021-08-21 16:57:14,794 INFO L226 Difference]: Without dead ends: 2433 [2021-08-21 16:57:14,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:57:14,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-08-21 16:57:14,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 947. [2021-08-21 16:57:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 939 states have (on average 1.3706070287539935) internal successors, (1287), 946 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:14,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1287 transitions. [2021-08-21 16:57:14,806 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1287 transitions. Word has length 130 [2021-08-21 16:57:14,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:14,806 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1287 transitions. [2021-08-21 16:57:14,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1287 transitions. [2021-08-21 16:57:14,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:14,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:14,808 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:14,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 16:57:15,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 16:57:15,009 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -809480039, now seen corresponding path program 117 times [2021-08-21 16:57:15,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:15,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956238877] [2021-08-21 16:57:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:15,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:15,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:15,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956238877] [2021-08-21 16:57:15,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956238877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:15,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564873952] [2021-08-21 16:57:15,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:57:15,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:15,397 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:15,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 16:57:21,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 16:57:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:57:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-21 16:57:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:22,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564873952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:22,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:22,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:22,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705573974] [2021-08-21 16:57:22,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:22,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:22,100 INFO L87 Difference]: Start difference. First operand 947 states and 1287 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:22,663 INFO L93 Difference]: Finished difference Result 2573 states and 3221 transitions. [2021-08-21 16:57:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:57:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:22,667 INFO L225 Difference]: With dead ends: 2573 [2021-08-21 16:57:22,667 INFO L226 Difference]: Without dead ends: 2423 [2021-08-21 16:57:22,667 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:57:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-08-21 16:57:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 977. [2021-08-21 16:57:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 969 states have (on average 1.3715170278637772) internal successors, (1329), 976 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1329 transitions. [2021-08-21 16:57:22,680 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1329 transitions. Word has length 130 [2021-08-21 16:57:22,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:22,680 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1329 transitions. [2021-08-21 16:57:22,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1329 transitions. [2021-08-21 16:57:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:22,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:22,681 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:22,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 16:57:22,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 16:57:22,882 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash 524717339, now seen corresponding path program 118 times [2021-08-21 16:57:22,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:22,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341465139] [2021-08-21 16:57:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:22,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:23,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:23,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341465139] [2021-08-21 16:57:23,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341465139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:23,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716351064] [2021-08-21 16:57:23,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:57:23,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:23,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:23,195 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:23,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 16:57:29,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:57:29,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:57:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:57:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:29,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716351064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:29,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:29,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:29,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859293126] [2021-08-21 16:57:29,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:29,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:29,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:29,919 INFO L87 Difference]: Start difference. First operand 977 states and 1329 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:30,526 INFO L93 Difference]: Finished difference Result 2563 states and 3203 transitions. [2021-08-21 16:57:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:57:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:30,529 INFO L225 Difference]: With dead ends: 2563 [2021-08-21 16:57:30,529 INFO L226 Difference]: Without dead ends: 2413 [2021-08-21 16:57:30,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 630.5ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:57:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-08-21 16:57:30,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1007. [2021-08-21 16:57:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 999 states have (on average 1.3723723723723724) internal successors, (1371), 1006 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1371 transitions. [2021-08-21 16:57:30,543 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1371 transitions. Word has length 130 [2021-08-21 16:57:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:30,543 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 1371 transitions. [2021-08-21 16:57:30,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1371 transitions. [2021-08-21 16:57:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:30,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:30,544 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:30,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 16:57:30,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:30,748 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:30,749 INFO L82 PathProgramCache]: Analyzing trace with hash -338418659, now seen corresponding path program 119 times [2021-08-21 16:57:30,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:30,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053759888] [2021-08-21 16:57:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:30,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:31,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:31,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053759888] [2021-08-21 16:57:31,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053759888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:31,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275621424] [2021-08-21 16:57:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:57:31,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:31,104 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:31,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 16:57:37,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 16:57:37,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:57:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:57:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:37,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275621424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:37,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:37,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:37,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456734939] [2021-08-21 16:57:37,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:37,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:37,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:37,832 INFO L87 Difference]: Start difference. First operand 1007 states and 1371 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:38,482 INFO L93 Difference]: Finished difference Result 2553 states and 3185 transitions. [2021-08-21 16:57:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:57:38,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:38,485 INFO L225 Difference]: With dead ends: 2553 [2021-08-21 16:57:38,486 INFO L226 Difference]: Without dead ends: 2403 [2021-08-21 16:57:38,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 642.2ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:57:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-08-21 16:57:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 1037. [2021-08-21 16:57:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1029 states have (on average 1.3731778425655976) internal successors, (1413), 1036 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1413 transitions. [2021-08-21 16:57:38,501 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1413 transitions. Word has length 130 [2021-08-21 16:57:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:38,501 INFO L470 AbstractCegarLoop]: Abstraction has 1037 states and 1413 transitions. [2021-08-21 16:57:38,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1413 transitions. [2021-08-21 16:57:38,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:38,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:38,503 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:38,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 16:57:38,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:38,705 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash -346016353, now seen corresponding path program 120 times [2021-08-21 16:57:38,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:38,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958476063] [2021-08-21 16:57:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:38,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:39,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:39,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958476063] [2021-08-21 16:57:39,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958476063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:39,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277100430] [2021-08-21 16:57:39,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:57:39,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:39,025 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:39,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 16:57:45,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 16:57:45,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:57:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 16:57:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:45,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277100430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:45,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:45,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:45,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99115566] [2021-08-21 16:57:45,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:45,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:45,867 INFO L87 Difference]: Start difference. First operand 1037 states and 1413 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:46,572 INFO L93 Difference]: Finished difference Result 2543 states and 3167 transitions. [2021-08-21 16:57:46,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:57:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:46,575 INFO L225 Difference]: With dead ends: 2543 [2021-08-21 16:57:46,575 INFO L226 Difference]: Without dead ends: 2393 [2021-08-21 16:57:46,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 716.6ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 16:57:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-08-21 16:57:46,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 1067. [2021-08-21 16:57:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1059 states have (on average 1.3739376770538243) internal successors, (1455), 1066 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1455 transitions. [2021-08-21 16:57:46,588 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1455 transitions. Word has length 130 [2021-08-21 16:57:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:46,588 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1455 transitions. [2021-08-21 16:57:46,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1455 transitions. [2021-08-21 16:57:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:46,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:46,589 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:46,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 16:57:46,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:46,790 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:46,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:46,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1749672353, now seen corresponding path program 121 times [2021-08-21 16:57:46,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:46,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531311659] [2021-08-21 16:57:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:46,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:47,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:47,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531311659] [2021-08-21 16:57:47,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531311659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:47,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895358445] [2021-08-21 16:57:47,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:57:47,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:47,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:47,053 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:47,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 16:57:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:57:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:57:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895358445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:53,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:57:53,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:57:53,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520951579] [2021-08-21 16:57:53,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:57:53,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:57:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:57:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:57:53,914 INFO L87 Difference]: Start difference. First operand 1067 states and 1455 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:57:54,663 INFO L93 Difference]: Finished difference Result 2533 states and 3149 transitions. [2021-08-21 16:57:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:57:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:57:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:57:54,666 INFO L225 Difference]: With dead ends: 2533 [2021-08-21 16:57:54,666 INFO L226 Difference]: Without dead ends: 2383 [2021-08-21 16:57:54,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 16:57:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-08-21 16:57:54,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 1097. [2021-08-21 16:57:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1089 states have (on average 1.3746556473829201) internal successors, (1497), 1096 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1497 transitions. [2021-08-21 16:57:54,679 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1497 transitions. Word has length 130 [2021-08-21 16:57:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:57:54,679 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1497 transitions. [2021-08-21 16:57:54,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:57:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1497 transitions. [2021-08-21 16:57:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:57:54,680 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:57:54,680 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:57:54,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 16:57:54,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 16:57:54,885 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:57:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:57:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 592988195, now seen corresponding path program 122 times [2021-08-21 16:57:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:57:54,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569925810] [2021-08-21 16:57:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:57:54,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:57:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:57:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:57:55,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:57:55,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569925810] [2021-08-21 16:57:55,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569925810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:57:55,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951919818] [2021-08-21 16:57:55,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:57:55,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:57:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:57:55,152 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:57:55,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 16:58:01,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:58:01,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:58:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:58:01,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:02,184 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951919818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:02,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:02,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:58:02,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141274496] [2021-08-21 16:58:02,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:58:02,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:58:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:58:02,185 INFO L87 Difference]: Start difference. First operand 1097 states and 1497 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:02,958 INFO L93 Difference]: Finished difference Result 2523 states and 3131 transitions. [2021-08-21 16:58:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:58:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:58:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:02,960 INFO L225 Difference]: With dead ends: 2523 [2021-08-21 16:58:02,960 INFO L226 Difference]: Without dead ends: 2373 [2021-08-21 16:58:02,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 744.9ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 16:58:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-08-21 16:58:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1127. [2021-08-21 16:58:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1119 states have (on average 1.3753351206434317) internal successors, (1539), 1126 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1539 transitions. [2021-08-21 16:58:02,973 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1539 transitions. Word has length 130 [2021-08-21 16:58:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:02,974 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1539 transitions. [2021-08-21 16:58:02,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1539 transitions. [2021-08-21 16:58:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:58:02,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:02,975 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:03,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 16:58:03,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:03,177 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1246066395, now seen corresponding path program 123 times [2021-08-21 16:58:03,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:03,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842619102] [2021-08-21 16:58:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:03,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:03,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:03,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842619102] [2021-08-21 16:58:03,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842619102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:03,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917345486] [2021-08-21 16:58:03,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:58:03,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:03,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:03,619 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:03,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 16:58:10,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 16:58:10,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:58:10,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:58:10,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917345486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:10,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-21 16:58:10,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418806482] [2021-08-21 16:58:10,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:58:10,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:10,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:58:10,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:58:10,466 INFO L87 Difference]: Start difference. First operand 1127 states and 1539 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:11,267 INFO L93 Difference]: Finished difference Result 2985 states and 3721 transitions. [2021-08-21 16:58:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 16:58:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-08-21 16:58:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:11,271 INFO L225 Difference]: With dead ends: 2985 [2021-08-21 16:58:11,271 INFO L226 Difference]: Without dead ends: 2823 [2021-08-21 16:58:11,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 16:58:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-08-21 16:58:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 1160. [2021-08-21 16:58:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1152 states have (on average 1.3819444444444444) internal successors, (1592), 1159 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1592 transitions. [2021-08-21 16:58:11,286 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1592 transitions. Word has length 130 [2021-08-21 16:58:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:11,286 INFO L470 AbstractCegarLoop]: Abstraction has 1160 states and 1592 transitions. [2021-08-21 16:58:11,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:11,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1592 transitions. [2021-08-21 16:58:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 16:58:11,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:11,287 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:11,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 16:58:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:11,488 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1202953535, now seen corresponding path program 124 times [2021-08-21 16:58:11,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:11,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509659232] [2021-08-21 16:58:11,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:11,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:11,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:11,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509659232] [2021-08-21 16:58:11,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509659232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:11,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164084269] [2021-08-21 16:58:11,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:58:11,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:11,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:11,750 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:11,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 16:58:18,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:58:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:58:18,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 16:58:18,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164084269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:18,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:18,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-08-21 16:58:18,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207527839] [2021-08-21 16:58:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 16:58:18,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 16:58:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-08-21 16:58:18,809 INFO L87 Difference]: Start difference. First operand 1160 states and 1592 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:19,811 INFO L93 Difference]: Finished difference Result 2436 states and 3021 transitions. [2021-08-21 16:58:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 16:58:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 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 130 [2021-08-21 16:58:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:19,814 INFO L225 Difference]: With dead ends: 2436 [2021-08-21 16:58:19,814 INFO L226 Difference]: Without dead ends: 2313 [2021-08-21 16:58:19,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 975.2ms TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 16:58:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-08-21 16:58:19,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 907. [2021-08-21 16:58:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 899 states have (on average 1.3659621802002224) internal successors, (1228), 906 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1228 transitions. [2021-08-21 16:58:19,827 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1228 transitions. Word has length 130 [2021-08-21 16:58:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:19,827 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1228 transitions. [2021-08-21 16:58:19,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1228 transitions. [2021-08-21 16:58:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:58:19,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:19,829 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:19,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 16:58:20,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:20,039 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:20,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:20,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1941495152, now seen corresponding path program 125 times [2021-08-21 16:58:20,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:20,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883547529] [2021-08-21 16:58:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:20,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:20,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:20,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883547529] [2021-08-21 16:58:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883547529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:20,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144577740] [2021-08-21 16:58:20,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:58:20,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:20,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:20,500 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:20,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 16:58:27,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 16:58:27,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:58:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:58:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144577740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:27,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:27,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:58:27,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146737503] [2021-08-21 16:58:27,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:58:27,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:27,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:58:27,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:58:27,801 INFO L87 Difference]: Start difference. First operand 907 states and 1228 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:28,330 INFO L93 Difference]: Finished difference Result 2173 states and 2757 transitions. [2021-08-21 16:58:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 16:58:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:58:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:28,333 INFO L225 Difference]: With dead ends: 2173 [2021-08-21 16:58:28,333 INFO L226 Difference]: Without dead ends: 2023 [2021-08-21 16:58:28,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 599.8ms TimeCoverageRelationStatistics Valid=722, Invalid=2034, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 16:58:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-08-21 16:58:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 912. [2021-08-21 16:58:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 904 states have (on average 1.366150442477876) internal successors, (1235), 911 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1235 transitions. [2021-08-21 16:58:28,347 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1235 transitions. Word has length 135 [2021-08-21 16:58:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:28,347 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1235 transitions. [2021-08-21 16:58:28,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1235 transitions. [2021-08-21 16:58:28,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:58:28,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:28,348 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:28,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 16:58:28,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 16:58:28,548 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1703800942, now seen corresponding path program 126 times [2021-08-21 16:58:28,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:28,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888333945] [2021-08-21 16:58:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:28,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:28,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888333945] [2021-08-21 16:58:28,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888333945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:28,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90212694] [2021-08-21 16:58:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:58:28,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:28,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:28,884 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:28,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 16:58:35,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 16:58:35,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:58:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:58:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:36,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90212694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:36,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:36,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:58:36,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54263037] [2021-08-21 16:58:36,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:58:36,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:36,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:58:36,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:58:36,379 INFO L87 Difference]: Start difference. First operand 912 states and 1235 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:36,921 INFO L93 Difference]: Finished difference Result 2648 states and 3329 transitions. [2021-08-21 16:58:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:58:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:58:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:36,924 INFO L225 Difference]: With dead ends: 2648 [2021-08-21 16:58:36,924 INFO L226 Difference]: Without dead ends: 2498 [2021-08-21 16:58:36,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=776, Invalid=2304, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:58:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-08-21 16:58:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 942. [2021-08-21 16:58:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 934 states have (on average 1.3672376873661671) internal successors, (1277), 941 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1277 transitions. [2021-08-21 16:58:36,938 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1277 transitions. Word has length 135 [2021-08-21 16:58:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:36,938 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1277 transitions. [2021-08-21 16:58:36,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1277 transitions. [2021-08-21 16:58:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:58:36,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:36,939 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:36,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 16:58:37,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 16:58:37,140 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash 707720980, now seen corresponding path program 127 times [2021-08-21 16:58:37,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:37,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430210990] [2021-08-21 16:58:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:37,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:37,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:37,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430210990] [2021-08-21 16:58:37,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430210990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:37,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165993225] [2021-08-21 16:58:37,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:58:37,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:37,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:37,673 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:37,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 16:58:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:58:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:45,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165993225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:45,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:45,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:58:45,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461545897] [2021-08-21 16:58:45,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:58:45,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:45,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:58:45,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:58:45,176 INFO L87 Difference]: Start difference. First operand 942 states and 1277 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:45,795 INFO L93 Difference]: Finished difference Result 2638 states and 3311 transitions. [2021-08-21 16:58:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:58:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:58:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:45,798 INFO L225 Difference]: With dead ends: 2638 [2021-08-21 16:58:45,798 INFO L226 Difference]: Without dead ends: 2488 [2021-08-21 16:58:45,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 701.8ms TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:58:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-08-21 16:58:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 972. [2021-08-21 16:58:45,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 964 states have (on average 1.3682572614107884) internal successors, (1319), 971 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1319 transitions. [2021-08-21 16:58:45,809 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1319 transitions. Word has length 135 [2021-08-21 16:58:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:45,810 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1319 transitions. [2021-08-21 16:58:45,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1319 transitions. [2021-08-21 16:58:45,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:58:45,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:45,811 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:45,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-21 16:58:46,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 16:58:46,011 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2143487722, now seen corresponding path program 128 times [2021-08-21 16:58:46,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:46,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128652844] [2021-08-21 16:58:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:46,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:46,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128652844] [2021-08-21 16:58:46,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128652844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:46,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004023315] [2021-08-21 16:58:46,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:58:46,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:46,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:46,322 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:46,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 16:58:53,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:58:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:58:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:58:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:58:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:53,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004023315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:53,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:58:53,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:58:53,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668908597] [2021-08-21 16:58:53,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:58:53,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:58:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:58:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:58:53,858 INFO L87 Difference]: Start difference. First operand 972 states and 1319 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:58:54,509 INFO L93 Difference]: Finished difference Result 2628 states and 3293 transitions. [2021-08-21 16:58:54,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 16:58:54,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:58:54,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:58:54,512 INFO L225 Difference]: With dead ends: 2628 [2021-08-21 16:58:54,512 INFO L226 Difference]: Without dead ends: 2478 [2021-08-21 16:58:54,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 16:58:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-08-21 16:58:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1002. [2021-08-21 16:58:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 994 states have (on average 1.369215291750503) internal successors, (1361), 1001 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1361 transitions. [2021-08-21 16:58:54,524 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1361 transitions. Word has length 135 [2021-08-21 16:58:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:58:54,524 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1361 transitions. [2021-08-21 16:58:54,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:58:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1361 transitions. [2021-08-21 16:58:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:58:54,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:58:54,525 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:58:54,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-21 16:58:54,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 16:58:54,726 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:58:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:58:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash -809290344, now seen corresponding path program 129 times [2021-08-21 16:58:54,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:58:54,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211062957] [2021-08-21 16:58:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:58:54,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:58:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:58:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:58:55,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:58:55,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211062957] [2021-08-21 16:58:55,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211062957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:58:55,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284329412] [2021-08-21 16:58:55,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:58:55,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:58:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:58:55,081 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:58:55,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 16:59:02,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 16:59:02,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:59:02,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 16:59:02,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:02,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284329412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:02,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:02,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:59:02,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573560814] [2021-08-21 16:59:02,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:59:02,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:59:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:59:02,668 INFO L87 Difference]: Start difference. First operand 1002 states and 1361 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:03,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:03,392 INFO L93 Difference]: Finished difference Result 2618 states and 3275 transitions. [2021-08-21 16:59:03,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:59:03,392 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:03,395 INFO L225 Difference]: With dead ends: 2618 [2021-08-21 16:59:03,395 INFO L226 Difference]: Without dead ends: 2468 [2021-08-21 16:59:03,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 729.7ms TimeCoverageRelationStatistics Valid=923, Invalid=2859, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 16:59:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-08-21 16:59:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1032. [2021-08-21 16:59:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1024 states have (on average 1.3701171875) internal successors, (1403), 1031 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1403 transitions. [2021-08-21 16:59:03,407 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1403 transitions. Word has length 135 [2021-08-21 16:59:03,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:03,407 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1403 transitions. [2021-08-21 16:59:03,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:03,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1403 transitions. [2021-08-21 16:59:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:59:03,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:03,408 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:03,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 16:59:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-21 16:59:03,609 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:03,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:03,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1672426342, now seen corresponding path program 130 times [2021-08-21 16:59:03,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:03,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557049450] [2021-08-21 16:59:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:03,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:04,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:04,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557049450] [2021-08-21 16:59:04,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557049450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:04,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606426597] [2021-08-21 16:59:04,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:59:04,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:04,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:04,017 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:04,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 16:59:11,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:59:11,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:59:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:59:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:11,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606426597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:11,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:11,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:59:11,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090549640] [2021-08-21 16:59:11,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:59:11,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:59:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:59:11,627 INFO L87 Difference]: Start difference. First operand 1032 states and 1403 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:12,345 INFO L93 Difference]: Finished difference Result 2608 states and 3257 transitions. [2021-08-21 16:59:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:59:12,345 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:12,347 INFO L225 Difference]: With dead ends: 2608 [2021-08-21 16:59:12,348 INFO L226 Difference]: Without dead ends: 2458 [2021-08-21 16:59:12,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=1004, Invalid=3028, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 16:59:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-08-21 16:59:12,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1062. [2021-08-21 16:59:12,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1054 states have (on average 1.3709677419354838) internal successors, (1445), 1061 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1445 transitions. [2021-08-21 16:59:12,361 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1445 transitions. Word has length 135 [2021-08-21 16:59:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:12,361 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1445 transitions. [2021-08-21 16:59:12,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1445 transitions. [2021-08-21 16:59:12,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:59:12,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:12,362 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:12,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-21 16:59:12,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:12,562 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1680024036, now seen corresponding path program 131 times [2021-08-21 16:59:12,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:12,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983839213] [2021-08-21 16:59:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:12,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:13,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:13,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983839213] [2021-08-21 16:59:13,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983839213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:13,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649934719] [2021-08-21 16:59:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:59:13,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:13,031 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:13,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 16:59:20,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 16:59:20,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:59:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:59:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:20,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649934719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:20,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:20,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:59:20,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127119571] [2021-08-21 16:59:20,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:59:20,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:59:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:59:20,759 INFO L87 Difference]: Start difference. First operand 1062 states and 1445 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:21,505 INFO L93 Difference]: Finished difference Result 2598 states and 3239 transitions. [2021-08-21 16:59:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:59:21,505 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:21,508 INFO L225 Difference]: With dead ends: 2598 [2021-08-21 16:59:21,508 INFO L226 Difference]: Without dead ends: 2448 [2021-08-21 16:59:21,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 747.7ms TimeCoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 16:59:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-08-21 16:59:21,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1092. [2021-08-21 16:59:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1084 states have (on average 1.371771217712177) internal successors, (1487), 1091 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1487 transitions. [2021-08-21 16:59:21,521 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1487 transitions. Word has length 135 [2021-08-21 16:59:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:21,521 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1487 transitions. [2021-08-21 16:59:21,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1487 transitions. [2021-08-21 16:59:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:59:21,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:21,522 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:21,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 16:59:21,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 16:59:21,725 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash 415664670, now seen corresponding path program 132 times [2021-08-21 16:59:21,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:21,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599356381] [2021-08-21 16:59:21,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:21,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:22,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:22,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599356381] [2021-08-21 16:59:22,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599356381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:22,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191645850] [2021-08-21 16:59:22,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:59:22,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:22,249 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:22,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 16:59:29,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 16:59:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:59:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 16:59:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:30,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191645850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:30,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:30,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:59:30,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036710481] [2021-08-21 16:59:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:59:30,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:30,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:59:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:59:30,117 INFO L87 Difference]: Start difference. First operand 1092 states and 1487 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:30,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:30,920 INFO L93 Difference]: Finished difference Result 2588 states and 3221 transitions. [2021-08-21 16:59:30,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 16:59:30,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:30,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:30,923 INFO L225 Difference]: With dead ends: 2588 [2021-08-21 16:59:30,923 INFO L226 Difference]: Without dead ends: 2438 [2021-08-21 16:59:30,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 849.8ms TimeCoverageRelationStatistics Valid=1214, Invalid=3342, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 16:59:30,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-08-21 16:59:30,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1122. [2021-08-21 16:59:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1114 states have (on average 1.3725314183123878) internal successors, (1529), 1121 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1529 transitions. [2021-08-21 16:59:30,936 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1529 transitions. Word has length 135 [2021-08-21 16:59:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:30,936 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1529 transitions. [2021-08-21 16:59:30,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1529 transitions. [2021-08-21 16:59:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:59:30,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:30,937 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:30,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-21 16:59:31,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:31,138 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:31,138 INFO L82 PathProgramCache]: Analyzing trace with hash -741019488, now seen corresponding path program 133 times [2021-08-21 16:59:31,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:31,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885397959] [2021-08-21 16:59:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:31,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:31,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:31,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885397959] [2021-08-21 16:59:31,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885397959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:31,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868104642] [2021-08-21 16:59:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:59:31,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:31,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:31,557 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:31,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 16:59:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:59:38,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:39,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868104642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:39,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:39,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:59:39,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966954291] [2021-08-21 16:59:39,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:59:39,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:39,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:59:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:59:39,215 INFO L87 Difference]: Start difference. First operand 1122 states and 1529 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:40,047 INFO L93 Difference]: Finished difference Result 2578 states and 3203 transitions. [2021-08-21 16:59:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 16:59:40,047 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:40,050 INFO L225 Difference]: With dead ends: 2578 [2021-08-21 16:59:40,050 INFO L226 Difference]: Without dead ends: 2428 [2021-08-21 16:59:40,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 808.4ms TimeCoverageRelationStatistics Valid=1343, Invalid=3487, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 16:59:40,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-08-21 16:59:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1152. [2021-08-21 16:59:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1144 states have (on average 1.3732517482517483) internal successors, (1571), 1151 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1571 transitions. [2021-08-21 16:59:40,068 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1571 transitions. Word has length 135 [2021-08-21 16:59:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:40,068 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 1571 transitions. [2021-08-21 16:59:40,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1571 transitions. [2021-08-21 16:59:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:59:40,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:40,070 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:40,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 16:59:40,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:40,285 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1714893218, now seen corresponding path program 134 times [2021-08-21 16:59:40,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:40,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776951670] [2021-08-21 16:59:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:40,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:40,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:40,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776951670] [2021-08-21 16:59:40,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776951670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:40,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949295151] [2021-08-21 16:59:40,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:59:40,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:40,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:40,729 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:40,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 16:59:48,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:59:48,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:59:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 16:59:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:48,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949295151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:48,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:48,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-21 16:59:48,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315779683] [2021-08-21 16:59:48,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 16:59:48,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 16:59:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:59:48,399 INFO L87 Difference]: Start difference. First operand 1152 states and 1571 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:49,262 INFO L93 Difference]: Finished difference Result 3015 states and 3763 transitions. [2021-08-21 16:59:49,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 16:59:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:49,266 INFO L225 Difference]: With dead ends: 3015 [2021-08-21 16:59:49,266 INFO L226 Difference]: Without dead ends: 2853 [2021-08-21 16:59:49,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1001.0ms TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 16:59:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2853 states. [2021-08-21 16:59:49,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2853 to 1185. [2021-08-21 16:59:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1177 states have (on average 1.3797790994052677) internal successors, (1624), 1184 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1624 transitions. [2021-08-21 16:59:49,283 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1624 transitions. Word has length 135 [2021-08-21 16:59:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:49,284 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1624 transitions. [2021-08-21 16:59:49,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1624 transitions. [2021-08-21 16:59:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-21 16:59:49,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:49,285 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:49,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-21 16:59:49,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:49,485 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1758006078, now seen corresponding path program 135 times [2021-08-21 16:59:49,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:49,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641885252] [2021-08-21 16:59:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:49,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:49,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:49,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641885252] [2021-08-21 16:59:49,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641885252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:49,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810645886] [2021-08-21 16:59:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:59:49,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:49,775 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:49,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 16:59:57,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 16:59:57,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:59:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 16:59:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:59:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:57,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810645886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:57,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:59:57,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-08-21 16:59:57,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737382080] [2021-08-21 16:59:57,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 16:59:57,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:59:57,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 16:59:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:59:57,598 INFO L87 Difference]: Start difference. First operand 1185 states and 1624 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:59:58,703 INFO L93 Difference]: Finished difference Result 2701 states and 3362 transitions. [2021-08-21 16:59:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 16:59:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 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 135 [2021-08-21 16:59:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:59:58,707 INFO L225 Difference]: With dead ends: 2701 [2021-08-21 16:59:58,707 INFO L226 Difference]: Without dead ends: 2498 [2021-08-21 16:59:58,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 1068.6ms TimeCoverageRelationStatistics Valid=1436, Invalid=4416, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 16:59:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-08-21 16:59:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1198. [2021-08-21 16:59:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1190 states have (on average 1.3697478991596639) internal successors, (1630), 1197 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1630 transitions. [2021-08-21 16:59:58,722 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1630 transitions. Word has length 135 [2021-08-21 16:59:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:59:58,722 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1630 transitions. [2021-08-21 16:59:58,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:59:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1630 transitions. [2021-08-21 16:59:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 16:59:58,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:59:58,724 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:59:58,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 16:59:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:58,924 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:59:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:59:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1240933430, now seen corresponding path program 136 times [2021-08-21 16:59:58,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:59:58,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412604795] [2021-08-21 16:59:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:59:58,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:59:59,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:59:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:59:59,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:59:59,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412604795] [2021-08-21 16:59:59,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412604795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:59:59,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76296368] [2021-08-21 16:59:59,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:59:59,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:59:59,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:59:59,415 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:59:59,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 17:00:06,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:00:06,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:00:06,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:00:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:00:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:07,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76296368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:07,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:00:07,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-08-21 17:00:07,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18442602] [2021-08-21 17:00:07,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:00:07,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:00:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:00:07,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:00:07,809 INFO L87 Difference]: Start difference. First operand 1198 states and 1630 transitions. Second operand has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:08,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:00:08,541 INFO L93 Difference]: Finished difference Result 2222 states and 2887 transitions. [2021-08-21 17:00:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:00:08,541 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 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 140 [2021-08-21 17:00:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:00:08,543 INFO L225 Difference]: With dead ends: 2222 [2021-08-21 17:00:08,544 INFO L226 Difference]: Without dead ends: 2032 [2021-08-21 17:00:08,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 880.0ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:00:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-08-21 17:00:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1243. [2021-08-21 17:00:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1235 states have (on average 1.3724696356275303) internal successors, (1695), 1242 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1695 transitions. [2021-08-21 17:00:08,558 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1695 transitions. Word has length 140 [2021-08-21 17:00:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:00:08,558 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 1695 transitions. [2021-08-21 17:00:08,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.290322580645161) internal successors, (164), 31 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1695 transitions. [2021-08-21 17:00:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 17:00:08,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:00:08,560 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:00:08,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-21 17:00:08,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 17:00:08,772 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:00:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:00:08,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1493885872, now seen corresponding path program 137 times [2021-08-21 17:00:08,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:00:08,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953982615] [2021-08-21 17:00:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:00:08,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:00:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:09,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:00:09,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953982615] [2021-08-21 17:00:09,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953982615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:09,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848938751] [2021-08-21 17:00:09,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:00:09,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:00:09,270 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:00:09,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 17:00:17,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 17:00:17,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:00:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:00:17,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:00:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:17,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848938751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:17,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:00:17,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-21 17:00:17,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905472215] [2021-08-21 17:00:17,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:00:17,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:00:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:00:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:00:17,868 INFO L87 Difference]: Start difference. First operand 1243 states and 1695 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:00:18,514 INFO L93 Difference]: Finished difference Result 3079 states and 3913 transitions. [2021-08-21 17:00:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:00:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 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 140 [2021-08-21 17:00:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:00:18,516 INFO L225 Difference]: With dead ends: 3079 [2021-08-21 17:00:18,517 INFO L226 Difference]: Without dead ends: 2929 [2021-08-21 17:00:18,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 765.1ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:00:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-08-21 17:00:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1238. [2021-08-21 17:00:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1230 states have (on average 1.3739837398373984) internal successors, (1690), 1237 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1690 transitions. [2021-08-21 17:00:18,530 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1690 transitions. Word has length 140 [2021-08-21 17:00:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:00:18,530 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1690 transitions. [2021-08-21 17:00:18,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1690 transitions. [2021-08-21 17:00:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 17:00:18,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:00:18,532 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:00:18,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 17:00:18,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 17:00:18,745 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:00:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:00:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1433058468, now seen corresponding path program 138 times [2021-08-21 17:00:18,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:00:18,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577261329] [2021-08-21 17:00:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:00:18,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:00:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:19,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:00:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577261329] [2021-08-21 17:00:19,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577261329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960753748] [2021-08-21 17:00:19,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:00:19,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:00:19,204 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:00:19,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 17:00:27,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 17:00:27,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:00:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:00:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:00:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:27,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960753748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:27,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:00:27,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-21 17:00:27,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253611489] [2021-08-21 17:00:27,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:00:27,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:00:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:00:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:00:27,761 INFO L87 Difference]: Start difference. First operand 1238 states and 1690 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:00:28,297 INFO L93 Difference]: Finished difference Result 3044 states and 3858 transitions. [2021-08-21 17:00:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:00:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 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 140 [2021-08-21 17:00:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:00:28,301 INFO L225 Difference]: With dead ends: 3044 [2021-08-21 17:00:28,301 INFO L226 Difference]: Without dead ends: 2894 [2021-08-21 17:00:28,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:00:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2021-08-21 17:00:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 1238. [2021-08-21 17:00:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1230 states have (on average 1.3739837398373984) internal successors, (1690), 1237 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1690 transitions. [2021-08-21 17:00:28,318 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1690 transitions. Word has length 140 [2021-08-21 17:00:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:00:28,318 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1690 transitions. [2021-08-21 17:00:28,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1690 transitions. [2021-08-21 17:00:28,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 17:00:28,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:00:28,320 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:00:28,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-21 17:00:28,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 17:00:28,520 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:00:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:00:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1670752678, now seen corresponding path program 139 times [2021-08-21 17:00:28,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:00:28,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728281647] [2021-08-21 17:00:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:00:28,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:00:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:29,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:00:29,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728281647] [2021-08-21 17:00:29,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728281647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:29,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66716854] [2021-08-21 17:00:29,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:00:29,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:29,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:00:29,093 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:00:29,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 17:00:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:36,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:00:36,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:00:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:37,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66716854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:37,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:00:37,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-21 17:00:37,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064815261] [2021-08-21 17:00:37,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:00:37,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:00:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:00:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:00:37,558 INFO L87 Difference]: Start difference. First operand 1238 states and 1690 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:00:38,151 INFO L93 Difference]: Finished difference Result 3004 states and 3798 transitions. [2021-08-21 17:00:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:00:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 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 140 [2021-08-21 17:00:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:00:38,155 INFO L225 Difference]: With dead ends: 3004 [2021-08-21 17:00:38,155 INFO L226 Difference]: Without dead ends: 2854 [2021-08-21 17:00:38,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:00:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-08-21 17:00:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1238. [2021-08-21 17:00:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1230 states have (on average 1.3739837398373984) internal successors, (1690), 1237 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:38,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1690 transitions. [2021-08-21 17:00:38,196 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1690 transitions. Word has length 140 [2021-08-21 17:00:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:00:38,196 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1690 transitions. [2021-08-21 17:00:38,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1690 transitions. [2021-08-21 17:00:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 17:00:38,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:00:38,197 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:00:38,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 17:00:38,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 17:00:38,398 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:00:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:00:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash -212692696, now seen corresponding path program 140 times [2021-08-21 17:00:38,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:00:38,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319298039] [2021-08-21 17:00:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:00:38,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:00:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:38,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:00:38,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319298039] [2021-08-21 17:00:38,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319298039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:38,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610984832] [2021-08-21 17:00:38,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:00:38,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:38,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:00:38,836 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:00:38,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 17:00:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:00:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:00:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:00:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:00:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:47,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610984832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:47,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:00:47,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-21 17:00:47,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275006488] [2021-08-21 17:00:47,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:00:47,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:00:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:00:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:00:47,451 INFO L87 Difference]: Start difference. First operand 1238 states and 1690 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:00:48,100 INFO L93 Difference]: Finished difference Result 2964 states and 3738 transitions. [2021-08-21 17:00:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:00:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 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 140 [2021-08-21 17:00:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:00:48,104 INFO L225 Difference]: With dead ends: 2964 [2021-08-21 17:00:48,104 INFO L226 Difference]: Without dead ends: 2814 [2021-08-21 17:00:48,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 17:00:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-08-21 17:00:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 1238. [2021-08-21 17:00:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1230 states have (on average 1.3739837398373984) internal successors, (1690), 1237 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1690 transitions. [2021-08-21 17:00:48,119 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1690 transitions. Word has length 140 [2021-08-21 17:00:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:00:48,120 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1690 transitions. [2021-08-21 17:00:48,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1690 transitions. [2021-08-21 17:00:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 17:00:48,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:00:48,121 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:00:48,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-21 17:00:48,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:48,322 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:00:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:00:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1231065898, now seen corresponding path program 141 times [2021-08-21 17:00:48,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:00:48,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423892788] [2021-08-21 17:00:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:00:48,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:00:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:48,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:00:48,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423892788] [2021-08-21 17:00:48,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423892788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:48,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134904614] [2021-08-21 17:00:48,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:00:48,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:48,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:00:48,789 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:00:48,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 17:00:56,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 17:00:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:00:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:00:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:00:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:57,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134904614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:57,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:00:57,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-21 17:00:57,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549748027] [2021-08-21 17:00:57,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:00:57,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:00:57,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:00:57,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:00:57,502 INFO L87 Difference]: Start difference. First operand 1238 states and 1690 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:58,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:00:58,195 INFO L93 Difference]: Finished difference Result 2924 states and 3678 transitions. [2021-08-21 17:00:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:00:58,195 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 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 140 [2021-08-21 17:00:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:00:58,198 INFO L225 Difference]: With dead ends: 2924 [2021-08-21 17:00:58,198 INFO L226 Difference]: Without dead ends: 2774 [2021-08-21 17:00:58,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 768.3ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:00:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-08-21 17:00:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 1238. [2021-08-21 17:00:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1230 states have (on average 1.3739837398373984) internal successors, (1690), 1237 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1690 transitions. [2021-08-21 17:00:58,214 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1690 transitions. Word has length 140 [2021-08-21 17:00:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:00:58,214 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1690 transitions. [2021-08-21 17:00:58,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:00:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1690 transitions. [2021-08-21 17:00:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-08-21 17:00:58,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:00:58,215 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:00:58,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 17:00:58,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 17:00:58,416 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:00:58,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:00:58,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1729704020, now seen corresponding path program 142 times [2021-08-21 17:00:58,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:00:58,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210476958] [2021-08-21 17:00:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:00:58,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:00:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:00:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:00:58,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:00:58,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210476958] [2021-08-21 17:00:58,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210476958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:00:58,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927846413] [2021-08-21 17:00:58,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:00:58,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:00:58,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:00:58,744 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:00:58,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 17:01:02,267 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 17:01:02,275 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 17:01:03,270 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-21 17:01:03,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 17:01:03,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-21 17:01:03,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:01:03,471 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 141 with TraceHistMax 11,while executing Executor. [2021-08-21 17:01:03,472 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:01:03,473 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:01:03,475 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:01:03,475 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:01:03,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:01:03 BasicIcfg [2021-08-21 17:01:03,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:01:03,478 INFO L168 Benchmark]: Toolchain (without parser) took 691021.59 ms. Allocated memory was 197.1 MB in the beginning and 2.3 GB in the end (delta: 2.1 GB). Free memory was 161.0 MB in the beginning and 897.4 MB in the end (delta: -736.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 17:01:03,478 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 197.1 MB. Free memory was 179.1 MB in the beginning and 178.9 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:01:03,478 INFO L168 Benchmark]: CACSL2BoogieTranslator took 414.35 ms. Allocated memory is still 197.1 MB. Free memory was 160.7 MB in the beginning and 171.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-21 17:01:03,478 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.93 ms. Allocated memory is still 197.1 MB. Free memory was 171.6 MB in the beginning and 169.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:01:03,478 INFO L168 Benchmark]: Boogie Preprocessor took 32.46 ms. Allocated memory is still 197.1 MB. Free memory was 169.5 MB in the beginning and 168.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:01:03,478 INFO L168 Benchmark]: RCFGBuilder took 503.47 ms. Allocated memory is still 197.1 MB. Free memory was 168.5 MB in the beginning and 146.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-21 17:01:03,479 INFO L168 Benchmark]: TraceAbstraction took 690010.86 ms. Allocated memory was 197.1 MB in the beginning and 2.3 GB in the end (delta: 2.1 GB). Free memory was 145.9 MB in the beginning and 897.4 MB in the end (delta: -751.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 17:01:03,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 197.1 MB. Free memory was 179.1 MB in the beginning and 178.9 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 414.35 ms. Allocated memory is still 197.1 MB. Free memory was 160.7 MB in the beginning and 171.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 53.93 ms. Allocated memory is still 197.1 MB. Free memory was 171.6 MB in the beginning and 169.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.46 ms. Allocated memory is still 197.1 MB. Free memory was 169.5 MB in the beginning and 168.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 503.47 ms. Allocated memory is still 197.1 MB. Free memory was 168.5 MB in the beginning and 146.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 690010.86 ms. Allocated memory was 197.1 MB in the beginning and 2.3 GB in the end (delta: 2.1 GB). Free memory was 145.9 MB in the beginning and 897.4 MB in the end (delta: -751.4 MB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1969, positive: 1680, positive conditional: 1680, positive unconditional: 0, negative: 289, negative conditional: 289, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1699, positive: 1680, positive conditional: 0, positive unconditional: 1680, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 330, positive: 327, positive conditional: 0, positive unconditional: 327, 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: 330, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 15, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1699, positive: 1353, positive conditional: 0, positive unconditional: 1353, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 330, unknown conditional: 0, unknown unconditional: 330] , Statistics on independence cache: Total cache size (in pairs): 330, Positive cache size: 327, Positive conditional cache size: 0, Positive unconditional cache size: 327, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 270 - 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 - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 141 with TraceHistMax 11,while executing Executor. - TimeoutResultAtElement [Line: 713]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 141 with TraceHistMax 11,while executing Executor. - TimeoutResultAtElement [Line: 714]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 141 with TraceHistMax 11,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 689886.3ms, OverallIterations: 151, TraceHistogramMax: 11, EmptinessCheckTime: 187.2ms, AutomataDifference: 69815.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 205.7ms, PartialOrderReductionTime: 176.7ms, HoareTripleCheckerStatistics: 11737 SDtfs, 89883 SDslu, 98611 SDs, 0 SdLazy, 21085 SolverSat, 15401 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13871.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20997 GetRequests, 14669 SyntacticMatches, 0 SemanticMatches, 6328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72697 ImplicationChecksByTransitivity, 69821.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1243occurred in iteration=145, InterpolantAutomatonStates: 4686, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1771.8ms AutomataMinimizationTime, 150 MinimizatonAttempts, 147468 StatesRemovedByMinimization, 150 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1775.0ms SsaConstructionTime, 4928.9ms SatisfiabilityAnalysisTime, 91145.9ms InterpolantComputationTime, 29508 NumberOfCodeBlocks, 29508 NumberOfCodeBlocksAsserted, 803 NumberOfCheckSat, 29214 ConstructedInterpolants, 0 QuantifiedInterpolants, 126260 SizeOfPredicates, 2218 NumberOfNonLiveVariables, 31200 ConjunctsInSsa, 3046 ConjunctsInUnsatCore, 294 InterpolantComputations, 6 PerfectInterpolantSequences, 0/63054 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown