/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-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:15:16,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:15:16,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:15:16,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:15:16,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:15:16,292 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:15:16,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:15:16,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:15:16,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:15:16,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:15:16,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:15:16,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:15:16,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:15:16,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:15:16,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:15:16,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:15:16,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:15:16,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:15:16,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:15:16,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:15:16,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:15:16,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:15:16,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:15:16,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:15:16,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 17:15:16,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:15:16,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:15:16,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:15:16,349 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 17:15:16,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:15:16,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:15:16,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:15:16,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:15:16,380 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:15:16,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:15:16,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:15:16,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:15:16,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:15:16,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:15:16,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:15:16,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:15:16,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:15:16,381 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:15:16,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:15:16,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:15:16,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:15:16,383 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:15:16,383 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:15:16,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:15:16,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:15:16,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:15:16,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 17:15:16,646 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 17:15:16,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-08-21 17:15:16,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b104ca16a/06a075eaa7d54306b8bb425c1c536599/FLAG85c354289 [2021-08-21 17:15:17,104 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 17:15:17,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-08-21 17:15:17,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b104ca16a/06a075eaa7d54306b8bb425c1c536599/FLAG85c354289 [2021-08-21 17:15:17,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b104ca16a/06a075eaa7d54306b8bb425c1c536599 [2021-08-21 17:15:17,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:15:17,141 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 17:15:17,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 17:15:17,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 17:15:17,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 17:15:17,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1032b7c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17, skipping insertion in model container [2021-08-21 17:15:17,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 17:15:17,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 17:15:17,338 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-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-08-21 17:15:17,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 17:15:17,590 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 17:15:17,601 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-C-DAC/pthread-demo-datarace-2.i[818,831] [2021-08-21 17:15:17,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 17:15:17,745 INFO L208 MainTranslator]: Completed translation [2021-08-21 17:15:17,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17 WrapperNode [2021-08-21 17:15:17,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 17:15:17,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:15:17,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:15:17,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:15:17,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:15:17,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:15:17,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:15:17,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:15:17,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:15:17,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:15:17,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:15:17,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:15:17,832 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (1/1) ... [2021-08-21 17:15:17,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:15:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:17,849 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 17:15:17,892 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 17:15:17,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 17:15:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 17:15:17,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-21 17:15:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-08-21 17:15:17,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-08-21 17:15:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 17:15:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 17:15:17,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:15:17,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:15:17,907 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 17:15:18,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:15:18,290 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-21 17:15:18,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:15:18 BoogieIcfgContainer [2021-08-21 17:15:18,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:15:18,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:15:18,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:15:18,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:15:18,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:15:17" (1/3) ... [2021-08-21 17:15:18,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7313e739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:15:18, skipping insertion in model container [2021-08-21 17:15:18,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:15:17" (2/3) ... [2021-08-21 17:15:18,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7313e739 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:15:18, skipping insertion in model container [2021-08-21 17:15:18,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:15:18" (3/3) ... [2021-08-21 17:15:18,298 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-08-21 17:15:18,302 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:15:18,302 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:15:18,302 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:15:18,302 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:15:18,325 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,325 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,326 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,327 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,327 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,327 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,327 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,328 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,328 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,328 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,328 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,328 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,328 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,329 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,330 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,330 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,330 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,330 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,330 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,330 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,331 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,331 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,331 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,331 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,331 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,332 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,334 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 17:15:18,344 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-08-21 17:15:18,379 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:15:18,384 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 17:15:18,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-21 17:15:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 324 states have (on average 1.2438271604938271) internal successors, (403), 343 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 17:15:18,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:18,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:15:18,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1909664030, now seen corresponding path program 1 times [2021-08-21 17:15:18,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:18,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312166997] [2021-08-21 17:15:18,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:18,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:18,787 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 17:15:18,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:18,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312166997] [2021-08-21 17:15:18,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312166997] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:18,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:15:18,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:15:18,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870328156] [2021-08-21 17:15:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-21 17:15:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-21 17:15:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-21 17:15:18,804 INFO L87 Difference]: Start difference. First operand has 344 states, 324 states have (on average 1.2438271604938271) internal successors, (403), 343 states have internal predecessors, (403), 0 states have call successors, (0), 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 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:18,822 INFO L93 Difference]: Finished difference Result 342 states and 376 transitions. [2021-08-21 17:15:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-21 17:15:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-08-21 17:15:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:18,831 INFO L225 Difference]: With dead ends: 342 [2021-08-21 17:15:18,831 INFO L226 Difference]: Without dead ends: 139 [2021-08-21 17:15:18,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-21 17:15:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-21 17:15:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-08-21 17:15:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.1594202898550725) internal successors, (160), 138 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 160 transitions. [2021-08-21 17:15:18,872 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 160 transitions. Word has length 61 [2021-08-21 17:15:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:18,873 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 160 transitions. [2021-08-21 17:15:18,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 160 transitions. [2021-08-21 17:15:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 17:15:18,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:18,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:15:18,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:15:18,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1941661604, now seen corresponding path program 1 times [2021-08-21 17:15:18,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:18,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225194455] [2021-08-21 17:15:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:18,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:18,980 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 17:15:18,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:18,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225194455] [2021-08-21 17:15:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225194455] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:18,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:15:18,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:15:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787665388] [2021-08-21 17:15:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:15:18,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:15:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:15:18,984 INFO L87 Difference]: Start difference. First operand 139 states and 160 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:19,007 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2021-08-21 17:15:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:15:19,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-08-21 17:15:19,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:19,011 INFO L225 Difference]: With dead ends: 187 [2021-08-21 17:15:19,011 INFO L226 Difference]: Without dead ends: 187 [2021-08-21 17:15:19,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:15:19,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-08-21 17:15:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 151. [2021-08-21 17:15:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1666666666666667) internal successors, (175), 150 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2021-08-21 17:15:19,030 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 61 [2021-08-21 17:15:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:19,031 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2021-08-21 17:15:19,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2021-08-21 17:15:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 17:15:19,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:19,031 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, 1, 1, 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 17:15:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:15:19,032 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -271156268, now seen corresponding path program 1 times [2021-08-21 17:15:19,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:19,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819583273] [2021-08-21 17:15:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:19,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:15:19,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:19,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819583273] [2021-08-21 17:15:19,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819583273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:19,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661538537] [2021-08-21 17:15:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:19,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:19,131 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 17:15:19,141 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 17:15:19,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-21 17:15:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:15:19,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661538537] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:15:19,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 17:15:19,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-21 17:15:19,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770112193] [2021-08-21 17:15:19,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:15:19,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:15:19,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:15:19,383 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:19,393 INFO L93 Difference]: Finished difference Result 207 states and 247 transitions. [2021-08-21 17:15:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:15:19,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-08-21 17:15:19,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:19,394 INFO L225 Difference]: With dead ends: 207 [2021-08-21 17:15:19,394 INFO L226 Difference]: Without dead ends: 207 [2021-08-21 17:15:19,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:15:19,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-21 17:15:19,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 152. [2021-08-21 17:15:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 151 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2021-08-21 17:15:19,400 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 66 [2021-08-21 17:15:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:19,400 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2021-08-21 17:15:19,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2021-08-21 17:15:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-21 17:15:19,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:19,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:19,419 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 17:15:19,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:19,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:19,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:19,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1769046609, now seen corresponding path program 1 times [2021-08-21 17:15:19,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:19,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354938938] [2021-08-21 17:15:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:19,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:15:19,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:19,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354938938] [2021-08-21 17:15:19,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354938938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:19,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961196647] [2021-08-21 17:15:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:19,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:19,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:19,670 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 17:15:19,671 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 17:15:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:19,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:15:19,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:15:19,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961196647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:19,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:19,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 17:15:19,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85809673] [2021-08-21 17:15:19,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:15:19,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:15:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:15:19,945 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:19,976 INFO L93 Difference]: Finished difference Result 248 states and 296 transitions. [2021-08-21 17:15:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:15:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 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 74 [2021-08-21 17:15:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:19,979 INFO L225 Difference]: With dead ends: 248 [2021-08-21 17:15:19,980 INFO L226 Difference]: Without dead ends: 248 [2021-08-21 17:15:19,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:15:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-21 17:15:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2021-08-21 17:15:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1895734597156398) internal successors, (251), 211 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 251 transitions. [2021-08-21 17:15:19,992 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 251 transitions. Word has length 74 [2021-08-21 17:15:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:19,997 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 251 transitions. [2021-08-21 17:15:19,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:19,997 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 251 transitions. [2021-08-21 17:15:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 17:15:19,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:19,998 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:15:20,021 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 17:15:20,214 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,SelfDestructingSolverStorable3 [2021-08-21 17:15:20,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:20,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1951811713, now seen corresponding path program 2 times [2021-08-21 17:15:20,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:20,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677849466] [2021-08-21 17:15:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:20,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 17:15:20,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:20,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677849466] [2021-08-21 17:15:20,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677849466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:20,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658364035] [2021-08-21 17:15:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:15:20,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:20,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:20,294 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 17:15:20,295 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 17:15:20,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:15:20,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:15:20,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 17:15:20,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658364035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:20,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:20,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 17:15:20,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882640818] [2021-08-21 17:15:20,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:15:20,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:20,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:15:20,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:15:20,626 INFO L87 Difference]: Start difference. First operand 212 states and 251 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 17:15:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:20,652 INFO L93 Difference]: Finished difference Result 406 states and 497 transitions. [2021-08-21 17:15:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:15:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 79 [2021-08-21 17:15:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:20,654 INFO L225 Difference]: With dead ends: 406 [2021-08-21 17:15:20,654 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 17:15:20,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:15:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 17:15:20,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 292. [2021-08-21 17:15:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.2268041237113403) internal successors, (357), 291 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 357 transitions. [2021-08-21 17:15:20,660 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 357 transitions. Word has length 79 [2021-08-21 17:15:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:20,660 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 357 transitions. [2021-08-21 17:15:20,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 17:15:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 357 transitions. [2021-08-21 17:15:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-21 17:15:20,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:20,661 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:15:20,680 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 17:15:20,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:20,881 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:20,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2125258330, now seen corresponding path program 3 times [2021-08-21 17:15:20,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:20,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515847727] [2021-08-21 17:15:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:20,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-08-21 17:15:20,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:20,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515847727] [2021-08-21 17:15:20,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515847727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:20,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410957885] [2021-08-21 17:15:20,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:15:20,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:20,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:20,932 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 17:15:20,961 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 17:15:21,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:15:21,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:21,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:15:21,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 17:15:21,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410957885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:21,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:21,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 17:15:21,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301934414] [2021-08-21 17:15:21,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:15:21,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:15:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:15:21,343 INFO L87 Difference]: Start difference. First operand 292 states and 357 transitions. Second operand has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 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 17:15:22,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:22,069 INFO L93 Difference]: Finished difference Result 790 states and 979 transitions. [2021-08-21 17:15:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 17:15:22,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 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 87 [2021-08-21 17:15:22,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:22,071 INFO L225 Difference]: With dead ends: 790 [2021-08-21 17:15:22,072 INFO L226 Difference]: Without dead ends: 790 [2021-08-21 17:15:22,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 625.8ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:15:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-08-21 17:15:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 526. [2021-08-21 17:15:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 1.2419047619047618) internal successors, (652), 525 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 652 transitions. [2021-08-21 17:15:22,083 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 652 transitions. Word has length 87 [2021-08-21 17:15:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:22,083 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 652 transitions. [2021-08-21 17:15:22,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 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 17:15:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 652 transitions. [2021-08-21 17:15:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 17:15:22,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:22,085 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 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 17:15:22,129 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 17:15:22,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:22,302 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1431371163, now seen corresponding path program 4 times [2021-08-21 17:15:22,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:22,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973366590] [2021-08-21 17:15:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:22,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-21 17:15:22,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:22,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973366590] [2021-08-21 17:15:22,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973366590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:22,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151677496] [2021-08-21 17:15:22,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:15:22,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:22,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:22,378 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 17:15:22,379 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 17:15:22,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:15:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:22,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:15:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-21 17:15:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151677496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:22,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:22,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 17:15:22,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514219771] [2021-08-21 17:15:22,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:15:22,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:15:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:15:22,758 INFO L87 Difference]: Start difference. First operand 526 states and 652 transitions. Second operand has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:22,823 INFO L93 Difference]: Finished difference Result 734 states and 916 transitions. [2021-08-21 17:15:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:15:22,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 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 17:15:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:22,826 INFO L225 Difference]: With dead ends: 734 [2021-08-21 17:15:22,826 INFO L226 Difference]: Without dead ends: 734 [2021-08-21 17:15:22,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:15:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-08-21 17:15:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 656. [2021-08-21 17:15:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.2473282442748093) internal successors, (817), 655 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 817 transitions. [2021-08-21 17:15:22,836 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 817 transitions. Word has length 100 [2021-08-21 17:15:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:22,836 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 817 transitions. [2021-08-21 17:15:22,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.090909090909092) internal successors, (89), 11 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 817 transitions. [2021-08-21 17:15:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 17:15:22,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:22,837 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 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 17:15:22,876 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 17:15:23,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:23,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:23,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1029531595, now seen corresponding path program 5 times [2021-08-21 17:15:23,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:23,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264900014] [2021-08-21 17:15:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:23,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-21 17:15:23,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:23,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264900014] [2021-08-21 17:15:23,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264900014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:23,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858213438] [2021-08-21 17:15:23,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:15:23,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:23,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:23,148 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 17:15:23,152 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 17:15:23,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:15:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:23,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:15:23,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-08-21 17:15:23,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858213438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:23,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:23,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 17:15:23,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88299736] [2021-08-21 17:15:23,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:15:23,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:23,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:15:23,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:15:23,673 INFO L87 Difference]: Start difference. First operand 656 states and 817 transitions. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:25,887 INFO L93 Difference]: Finished difference Result 1388 states and 1729 transitions. [2021-08-21 17:15:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-08-21 17:15:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-21 17:15:25,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:25,892 INFO L225 Difference]: With dead ends: 1388 [2021-08-21 17:15:25,892 INFO L226 Difference]: Without dead ends: 1388 [2021-08-21 17:15:25,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11284 ImplicationChecksByTransitivity, 2059.9ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-08-21 17:15:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-08-21 17:15:25,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1010. [2021-08-21 17:15:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 1009 states have (on average 1.250743310208127) internal successors, (1262), 1009 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:25,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1262 transitions. [2021-08-21 17:15:25,911 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1262 transitions. Word has length 105 [2021-08-21 17:15:25,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:25,912 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1262 transitions. [2021-08-21 17:15:25,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 18 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1262 transitions. [2021-08-21 17:15:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-21 17:15:25,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:25,914 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 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 17:15:25,931 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 17:15:26,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:26,131 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash -857275072, now seen corresponding path program 6 times [2021-08-21 17:15:26,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:26,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95419993] [2021-08-21 17:15:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:26,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:26,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:26,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95419993] [2021-08-21 17:15:26,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95419993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:26,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340504696] [2021-08-21 17:15:26,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:15:26,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:26,240 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 17:15:26,241 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 17:15:26,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:15:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:15:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:26,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340504696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:26,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:26,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-21 17:15:26,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156613605] [2021-08-21 17:15:26,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:15:26,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:15:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:15:26,735 INFO L87 Difference]: Start difference. First operand 1010 states and 1262 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:26,834 INFO L93 Difference]: Finished difference Result 1282 states and 1606 transitions. [2021-08-21 17:15:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:15:26,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 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 118 [2021-08-21 17:15:26,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:26,838 INFO L225 Difference]: With dead ends: 1282 [2021-08-21 17:15:26,838 INFO L226 Difference]: Without dead ends: 1282 [2021-08-21 17:15:26,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:15:26,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-08-21 17:15:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1180. [2021-08-21 17:15:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 1.2527565733672603) internal successors, (1477), 1179 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1477 transitions. [2021-08-21 17:15:26,852 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1477 transitions. Word has length 118 [2021-08-21 17:15:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:26,853 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1477 transitions. [2021-08-21 17:15:26,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1477 transitions. [2021-08-21 17:15:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-21 17:15:26,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:26,855 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 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, 1, 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 17:15:26,872 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 17:15:27,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:27,072 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 862897936, now seen corresponding path program 7 times [2021-08-21 17:15:27,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:27,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971964076] [2021-08-21 17:15:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:27,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:27,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:27,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971964076] [2021-08-21 17:15:27,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971964076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:27,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846345250] [2021-08-21 17:15:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:15:27,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:27,182 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 17:15:27,183 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 17:15:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:27,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:15:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:27,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846345250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:27,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:27,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 17:15:27,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628075938] [2021-08-21 17:15:27,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:15:27,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:15:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:15:27,679 INFO L87 Difference]: Start difference. First operand 1180 states and 1477 transitions. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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 17:15:27,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:27,798 INFO L93 Difference]: Finished difference Result 1452 states and 1821 transitions. [2021-08-21 17:15:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:15:27,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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 123 [2021-08-21 17:15:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:27,802 INFO L225 Difference]: With dead ends: 1452 [2021-08-21 17:15:27,802 INFO L226 Difference]: Without dead ends: 1452 [2021-08-21 17:15:27,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:15:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-08-21 17:15:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1350. [2021-08-21 17:15:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.2542624166048926) internal successors, (1692), 1349 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1692 transitions. [2021-08-21 17:15:27,819 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1692 transitions. Word has length 123 [2021-08-21 17:15:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:27,819 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1692 transitions. [2021-08-21 17:15:27,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 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 17:15:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1692 transitions. [2021-08-21 17:15:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-08-21 17:15:27,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:27,822 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 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, 1, 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 17:15:27,839 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 17:15:28,035 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,SelfDestructingSolverStorable9 [2021-08-21 17:15:28,035 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash -2088261824, now seen corresponding path program 8 times [2021-08-21 17:15:28,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:28,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432615110] [2021-08-21 17:15:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:28,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:28,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:28,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432615110] [2021-08-21 17:15:28,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432615110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:28,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676485434] [2021-08-21 17:15:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:15:28,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:28,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:28,231 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 17:15:28,232 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 17:15:28,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:15:28,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:28,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:15:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:28,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676485434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:28,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:28,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-21 17:15:28,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948361368] [2021-08-21 17:15:28,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:15:28,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:15:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:15:28,797 INFO L87 Difference]: Start difference. First operand 1350 states and 1692 transitions. Second operand has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:28,941 INFO L93 Difference]: Finished difference Result 1622 states and 2036 transitions. [2021-08-21 17:15:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:15:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 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 128 [2021-08-21 17:15:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:28,945 INFO L225 Difference]: With dead ends: 1622 [2021-08-21 17:15:28,946 INFO L226 Difference]: Without dead ends: 1622 [2021-08-21 17:15:28,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:15:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-08-21 17:15:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1520. [2021-08-21 17:15:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 1.2554312047399605) internal successors, (1907), 1519 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 1907 transitions. [2021-08-21 17:15:28,964 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 1907 transitions. Word has length 128 [2021-08-21 17:15:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:28,964 INFO L470 AbstractCegarLoop]: Abstraction has 1520 states and 1907 transitions. [2021-08-21 17:15:28,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 19 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 1907 transitions. [2021-08-21 17:15:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-21 17:15:28,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:28,966 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 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, 1, 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 17:15:28,984 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 17:15:29,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:29,184 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:29,184 INFO L82 PathProgramCache]: Analyzing trace with hash 300115216, now seen corresponding path program 9 times [2021-08-21 17:15:29,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:29,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286329497] [2021-08-21 17:15:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:29,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-21 17:15:29,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:29,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286329497] [2021-08-21 17:15:29,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286329497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:29,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980906540] [2021-08-21 17:15:29,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:15:29,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:29,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:29,337 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 17:15:29,338 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 17:15:29,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:15:29,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:29,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:15:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-08-21 17:15:30,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980906540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:30,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:30,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-21 17:15:30,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13195354] [2021-08-21 17:15:30,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:15:30,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:15:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:15:30,169 INFO L87 Difference]: Start difference. First operand 1520 states and 1907 transitions. Second operand has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:37,922 INFO L93 Difference]: Finished difference Result 2656 states and 3319 transitions. [2021-08-21 17:15:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2021-08-21 17:15:37,922 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 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 133 [2021-08-21 17:15:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:37,928 INFO L225 Difference]: With dead ends: 2656 [2021-08-21 17:15:37,928 INFO L226 Difference]: Without dead ends: 2656 [2021-08-21 17:15:37,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66946 ImplicationChecksByTransitivity, 7335.2ms TimeCoverageRelationStatistics Valid=27129, Invalid=114623, Unknown=0, NotChecked=0, Total=141752 [2021-08-21 17:15:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-08-21 17:15:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2074. [2021-08-21 17:15:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 1.255185721177038) internal successors, (2602), 2073 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 2602 transitions. [2021-08-21 17:15:37,971 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 2602 transitions. Word has length 133 [2021-08-21 17:15:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:37,971 INFO L470 AbstractCegarLoop]: Abstraction has 2074 states and 2602 transitions. [2021-08-21 17:15:37,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.5) internal successors, (154), 28 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 2602 transitions. [2021-08-21 17:15:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-08-21 17:15:37,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:37,974 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 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, 1, 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 17:15:38,004 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 17:15:38,186 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,SelfDestructingSolverStorable11 [2021-08-21 17:15:38,186 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:38,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash 356491035, now seen corresponding path program 10 times [2021-08-21 17:15:38,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:38,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511725187] [2021-08-21 17:15:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:38,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 17:15:38,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:38,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511725187] [2021-08-21 17:15:38,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511725187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:38,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552484498] [2021-08-21 17:15:38,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:15:38,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:38,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:38,383 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 17:15:38,384 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 17:15:38,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:15:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:15:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 17:15:39,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552484498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:39,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:39,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-21 17:15:39,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219133562] [2021-08-21 17:15:39,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:15:39,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:15:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:15:39,070 INFO L87 Difference]: Start difference. First operand 2074 states and 2602 transitions. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:39,280 INFO L93 Difference]: Finished difference Result 2410 states and 3026 transitions. [2021-08-21 17:15:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:15:39,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 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 146 [2021-08-21 17:15:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:39,286 INFO L225 Difference]: With dead ends: 2410 [2021-08-21 17:15:39,287 INFO L226 Difference]: Without dead ends: 2410 [2021-08-21 17:15:39,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:15:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-08-21 17:15:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2284. [2021-08-21 17:15:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 1.2558037669732807) internal successors, (2867), 2283 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2867 transitions. [2021-08-21 17:15:39,313 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2867 transitions. Word has length 146 [2021-08-21 17:15:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:39,313 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 2867 transitions. [2021-08-21 17:15:39,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2867 transitions. [2021-08-21 17:15:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-21 17:15:39,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:39,316 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 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, 1, 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 17:15:39,334 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 17:15:39,534 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,SelfDestructingSolverStorable12 [2021-08-21 17:15:39,534 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash -948598549, now seen corresponding path program 11 times [2021-08-21 17:15:39,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:39,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058074500] [2021-08-21 17:15:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:39,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 17:15:39,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:39,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058074500] [2021-08-21 17:15:39,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058074500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:39,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590402655] [2021-08-21 17:15:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:15:39,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:39,798 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 17:15:39,799 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 17:15:40,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 17:15:40,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:40,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:15:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-21 17:15:40,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590402655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:40,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:40,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-08-21 17:15:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784429684] [2021-08-21 17:15:40,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:15:40,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:15:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:15:40,653 INFO L87 Difference]: Start difference. First operand 2284 states and 2867 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:55,728 INFO L93 Difference]: Finished difference Result 3654 states and 4569 transitions. [2021-08-21 17:15:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2021-08-21 17:15:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-08-21 17:15:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:55,736 INFO L225 Difference]: With dead ends: 3654 [2021-08-21 17:15:55,736 INFO L226 Difference]: Without dead ends: 3654 [2021-08-21 17:15:55,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 558 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152076 ImplicationChecksByTransitivity, 14412.4ms TimeCoverageRelationStatistics Valid=57699, Invalid=255341, Unknown=0, NotChecked=0, Total=313040 [2021-08-21 17:15:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3654 states. [2021-08-21 17:15:55,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3654 to 2958. [2021-08-21 17:15:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 1.255326344267839) internal successors, (3712), 2957 states have internal predecessors, (3712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 3712 transitions. [2021-08-21 17:15:55,777 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 3712 transitions. Word has length 151 [2021-08-21 17:15:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:55,777 INFO L470 AbstractCegarLoop]: Abstraction has 2958 states and 3712 transitions. [2021-08-21 17:15:55,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 3712 transitions. [2021-08-21 17:15:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-08-21 17:15:55,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:55,781 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 6, 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, 1, 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 17:15:55,799 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 17:15:55,999 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,SelfDestructingSolverStorable13 [2021-08-21 17:15:55,999 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash -677966858, now seen corresponding path program 12 times [2021-08-21 17:15:55,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:55,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687726031] [2021-08-21 17:15:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:56,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:15:56,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:56,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687726031] [2021-08-21 17:15:56,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687726031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:56,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040111285] [2021-08-21 17:15:56,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:15:56,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:56,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:56,213 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 17:15:56,214 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 17:15:56,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 17:15:56,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:15:56,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:15:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:15:57,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040111285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:57,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:57,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-21 17:15:57,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973497722] [2021-08-21 17:15:57,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:15:57,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:15:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:15:57,138 INFO L87 Difference]: Start difference. First operand 2958 states and 3712 transitions. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:57,437 INFO L93 Difference]: Finished difference Result 3358 states and 4216 transitions. [2021-08-21 17:15:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:15:57,438 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 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 164 [2021-08-21 17:15:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:57,446 INFO L225 Difference]: With dead ends: 3358 [2021-08-21 17:15:57,447 INFO L226 Difference]: Without dead ends: 3358 [2021-08-21 17:15:57,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:15:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3358 states. [2021-08-21 17:15:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3358 to 3208. [2021-08-21 17:15:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3208 states, 3207 states have (on average 1.2556906766448395) internal successors, (4027), 3207 states have internal predecessors, (4027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3208 states to 3208 states and 4027 transitions. [2021-08-21 17:15:57,526 INFO L78 Accepts]: Start accepts. Automaton has 3208 states and 4027 transitions. Word has length 164 [2021-08-21 17:15:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:57,526 INFO L470 AbstractCegarLoop]: Abstraction has 3208 states and 4027 transitions. [2021-08-21 17:15:57,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3208 states and 4027 transitions. [2021-08-21 17:15:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-21 17:15:57,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:57,531 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 6, 6, 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, 1, 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 17:15:57,574 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 17:15:57,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 17:15:57,748 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1945379270, now seen corresponding path program 13 times [2021-08-21 17:15:57,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:57,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188196162] [2021-08-21 17:15:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:57,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:15:58,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:58,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188196162] [2021-08-21 17:15:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188196162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:58,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419355781] [2021-08-21 17:15:58,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:15:58,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:58,015 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 17:15:58,017 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 17:15:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:58,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:15:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:15:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:15:58,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419355781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:58,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:15:58,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-08-21 17:15:58,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732065025] [2021-08-21 17:15:58,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:15:58,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:15:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:15:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:15:58,925 INFO L87 Difference]: Start difference. First operand 3208 states and 4027 transitions. Second operand has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 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 17:15:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:15:59,244 INFO L93 Difference]: Finished difference Result 3608 states and 4531 transitions. [2021-08-21 17:15:59,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 17:15:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 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 169 [2021-08-21 17:15:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:15:59,253 INFO L225 Difference]: With dead ends: 3608 [2021-08-21 17:15:59,253 INFO L226 Difference]: Without dead ends: 3608 [2021-08-21 17:15:59,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:15:59,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2021-08-21 17:15:59,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3458. [2021-08-21 17:15:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3458 states, 3457 states have (on average 1.2560023141452126) internal successors, (4342), 3457 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:15:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3458 states to 3458 states and 4342 transitions. [2021-08-21 17:15:59,307 INFO L78 Accepts]: Start accepts. Automaton has 3458 states and 4342 transitions. Word has length 169 [2021-08-21 17:15:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:15:59,307 INFO L470 AbstractCegarLoop]: Abstraction has 3458 states and 4342 transitions. [2021-08-21 17:15:59,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.620689655172414) internal successors, (134), 29 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 17:15:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3458 states and 4342 transitions. [2021-08-21 17:15:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-08-21 17:15:59,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:15:59,322 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 6, 6, 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, 1, 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 17:15:59,377 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 17:15:59,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:59,548 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:15:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:15:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1114385910, now seen corresponding path program 14 times [2021-08-21 17:15:59,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:15:59,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626302617] [2021-08-21 17:15:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:15:59,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:15:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:15:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:15:59,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:15:59,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626302617] [2021-08-21 17:15:59,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626302617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:15:59,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277314905] [2021-08-21 17:15:59,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:15:59,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:15:59,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:15:59,766 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 17:15:59,767 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 17:16:00,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:16:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:16:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:16:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:16:00,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277314905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:00,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:00,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-08-21 17:16:00,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723512784] [2021-08-21 17:16:00,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:16:00,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:16:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:16:00,724 INFO L87 Difference]: Start difference. First operand 3458 states and 4342 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:16:00,982 INFO L93 Difference]: Finished difference Result 3858 states and 4846 transitions. [2021-08-21 17:16:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:16:00,982 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 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 174 [2021-08-21 17:16:00,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:16:00,990 INFO L225 Difference]: With dead ends: 3858 [2021-08-21 17:16:00,990 INFO L226 Difference]: Without dead ends: 3858 [2021-08-21 17:16:00,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:16:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3858 states. [2021-08-21 17:16:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3858 to 3708. [2021-08-21 17:16:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 1.2562719179929862) internal successors, (4657), 3707 states have internal predecessors, (4657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 4657 transitions. [2021-08-21 17:16:01,023 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 4657 transitions. Word has length 174 [2021-08-21 17:16:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:16:01,023 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 4657 transitions. [2021-08-21 17:16:01,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 4657 transitions. [2021-08-21 17:16:01,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-08-21 17:16:01,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:16:01,029 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 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, 1, 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 17:16:01,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 17:16:01,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 17:16:01,247 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:16:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:16:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1962655802, now seen corresponding path program 15 times [2021-08-21 17:16:01,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:16:01,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663803043] [2021-08-21 17:16:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:16:01,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:16:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 17:16:01,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:16:01,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663803043] [2021-08-21 17:16:01,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663803043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:01,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379567794] [2021-08-21 17:16:01,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:16:01,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:01,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:16:01,492 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 17:16:01,493 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 17:16:02,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:16:02,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:16:02,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:16:02,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-08-21 17:16:02,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379567794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:02,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2021-08-21 17:16:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547278621] [2021-08-21 17:16:02,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 17:16:02,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 17:16:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 17:16:02,631 INFO L87 Difference]: Start difference. First operand 3708 states and 4657 transitions. Second operand has 44 states, 44 states have (on average 4.545454545454546) internal successors, (200), 44 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:16:39,713 INFO L93 Difference]: Finished difference Result 5482 states and 6859 transitions. [2021-08-21 17:16:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 881 states. [2021-08-21 17:16:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.545454545454546) internal successors, (200), 44 states have internal predecessors, (200), 0 states have call successors, (0), 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 179 [2021-08-21 17:16:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:16:39,727 INFO L225 Difference]: With dead ends: 5482 [2021-08-21 17:16:39,728 INFO L226 Difference]: Without dead ends: 5482 [2021-08-21 17:16:39,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 899 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403826 ImplicationChecksByTransitivity, 35385.8ms TimeCoverageRelationStatistics Valid=144350, Invalid=666550, Unknown=0, NotChecked=0, Total=810900 [2021-08-21 17:16:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5482 states. [2021-08-21 17:16:39,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5482 to 4582. [2021-08-21 17:16:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 1.2556210434402968) internal successors, (5752), 4581 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 5752 transitions. [2021-08-21 17:16:39,877 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 5752 transitions. Word has length 179 [2021-08-21 17:16:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:16:39,877 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 5752 transitions. [2021-08-21 17:16:39,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.545454545454546) internal successors, (200), 44 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 5752 transitions. [2021-08-21 17:16:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-08-21 17:16:39,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:16:39,905 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 7, 7, 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, 1, 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 17:16:39,925 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 17:16:40,106 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,SelfDestructingSolverStorable17 [2021-08-21 17:16:40,106 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:16:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:16:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1426485295, now seen corresponding path program 16 times [2021-08-21 17:16:40,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:16:40,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216677914] [2021-08-21 17:16:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:16:40,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:16:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 17:16:40,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:16:40,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216677914] [2021-08-21 17:16:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216677914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871307126] [2021-08-21 17:16:40,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:16:40,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:16:40,405 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 17:16:40,450 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 17:16:41,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:16:41,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:16:41,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 17:16:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 17:16:41,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871307126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:41,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:41,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-08-21 17:16:41,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365447792] [2021-08-21 17:16:41,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 17:16:41,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 17:16:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:16:41,432 INFO L87 Difference]: Start difference. First operand 4582 states and 5752 transitions. Second operand has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:16:41,929 INFO L93 Difference]: Finished difference Result 5046 states and 6336 transitions. [2021-08-21 17:16:41,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 17:16:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 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 192 [2021-08-21 17:16:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:16:41,952 INFO L225 Difference]: With dead ends: 5046 [2021-08-21 17:16:41,952 INFO L226 Difference]: Without dead ends: 5046 [2021-08-21 17:16:41,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 558.3ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 17:16:41,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5046 states. [2021-08-21 17:16:42,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5046 to 4872. [2021-08-21 17:16:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4871 states have (on average 1.2557996304660235) internal successors, (6117), 4871 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 6117 transitions. [2021-08-21 17:16:42,038 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 6117 transitions. Word has length 192 [2021-08-21 17:16:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:16:42,044 INFO L470 AbstractCegarLoop]: Abstraction has 4872 states and 6117 transitions. [2021-08-21 17:16:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.257142857142857) internal successors, (149), 35 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:16:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 6117 transitions. [2021-08-21 17:16:42,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-08-21 17:16:42,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:16:42,054 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 7, 7, 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, 1, 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 17:16:42,073 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 17:16:42,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:42,269 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:16:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:16:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1753140641, now seen corresponding path program 17 times [2021-08-21 17:16:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:16:42,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775032409] [2021-08-21 17:16:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:16:42,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:16:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:16:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 17:16:42,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:16:42,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775032409] [2021-08-21 17:16:42,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775032409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:42,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728859929] [2021-08-21 17:16:42,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:16:42,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:16:42,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:16:42,632 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 17:16:42,634 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 17:16:43,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 17:16:43,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:16:43,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:16:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:16:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-08-21 17:16:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728859929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:16:43,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:16:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 17] total 50 [2021-08-21 17:16:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578986802] [2021-08-21 17:16:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 17:16:43,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:16:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 17:16:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:16:43,944 INFO L87 Difference]: Start difference. First operand 4872 states and 6117 transitions. Second operand has 50 states, 50 states have (on average 4.36) internal successors, (218), 50 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:17:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:17:42,617 INFO L93 Difference]: Finished difference Result 6880 states and 8609 transitions. [2021-08-21 17:17:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1151 states. [2021-08-21 17:17:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.36) internal successors, (218), 50 states have internal predecessors, (218), 0 states have call successors, (0), 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 197 [2021-08-21 17:17:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:17:42,625 INFO L225 Difference]: With dead ends: 6880 [2021-08-21 17:17:42,625 INFO L226 Difference]: Without dead ends: 6880 [2021-08-21 17:17:42,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1779 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 1172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693735 ImplicationChecksByTransitivity, 56067.2ms TimeCoverageRelationStatistics Valid=240556, Invalid=1136546, Unknown=0, NotChecked=0, Total=1377102 [2021-08-21 17:17:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-08-21 17:17:42,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 5866. [2021-08-21 17:17:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5865 states have (on average 1.2552429667519183) internal successors, (7362), 5865 states have internal predecessors, (7362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:17:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 7362 transitions. [2021-08-21 17:17:42,728 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 7362 transitions. Word has length 197 [2021-08-21 17:17:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:17:42,728 INFO L470 AbstractCegarLoop]: Abstraction has 5866 states and 7362 transitions. [2021-08-21 17:17:42,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.36) internal successors, (218), 50 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:17:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 7362 transitions. [2021-08-21 17:17:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-08-21 17:17:42,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:17:42,735 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 8, 8, 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, 1, 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 17:17:42,753 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 17:17:42,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:17:42,953 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:17:42,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:17:42,954 INFO L82 PathProgramCache]: Analyzing trace with hash -922982740, now seen corresponding path program 18 times [2021-08-21 17:17:42,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:17:42,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237864920] [2021-08-21 17:17:42,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:17:42,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:17:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:17:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-21 17:17:43,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:17:43,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237864920] [2021-08-21 17:17:43,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237864920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:17:43,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480789169] [2021-08-21 17:17:43,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:17:43,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:17:43,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:17:43,530 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 17:17:43,532 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 17:17:44,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-21 17:17:44,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:17:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:17:44,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:17:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-08-21 17:17:45,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480789169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:17:45,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:17:45,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 19] total 54 [2021-08-21 17:17:45,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11697398] [2021-08-21 17:17:45,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 17:17:45,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:17:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 17:17:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2404, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:17:45,282 INFO L87 Difference]: Start difference. First operand 5866 states and 7362 transitions. Second operand has 54 states, 54 states have (on average 4.277777777777778) internal successors, (231), 54 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:19:18,646 INFO L93 Difference]: Finished difference Result 8023 states and 10039 transitions. [2021-08-21 17:19:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1379 states. [2021-08-21 17:19:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.277777777777778) internal successors, (231), 54 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-08-21 17:19:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:19:18,656 INFO L225 Difference]: With dead ends: 8023 [2021-08-21 17:19:18,656 INFO L226 Difference]: Without dead ends: 8023 [2021-08-21 17:19:18,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2098 GetRequests, 696 SyntacticMatches, 0 SemanticMatches, 1402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999316 ImplicationChecksByTransitivity, 89259.0ms TimeCoverageRelationStatistics Valid=339740, Invalid=1630072, Unknown=0, NotChecked=0, Total=1969812 [2021-08-21 17:19:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2021-08-21 17:19:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 6940. [2021-08-21 17:19:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6939 states have (on average 1.254791756737282) internal successors, (8707), 6939 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 8707 transitions. [2021-08-21 17:19:18,811 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 8707 transitions. Word has length 210 [2021-08-21 17:19:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:19:18,811 INFO L470 AbstractCegarLoop]: Abstraction has 6940 states and 8707 transitions. [2021-08-21 17:19:18,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.277777777777778) internal successors, (231), 54 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 8707 transitions. [2021-08-21 17:19:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-08-21 17:19:18,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:19:18,820 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 9, 9, 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, 1, 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 17:19:18,839 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 17:19:19,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:19:19,039 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:19:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:19:19,039 INFO L82 PathProgramCache]: Analyzing trace with hash 906537559, now seen corresponding path program 19 times [2021-08-21 17:19:19,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:19:19,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574158649] [2021-08-21 17:19:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:19:19,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:19:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:19:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-21 17:19:19,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:19:19,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574158649] [2021-08-21 17:19:19,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574158649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:19,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821854344] [2021-08-21 17:19:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:19:19,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:19:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:19:19,545 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 17:19:19,546 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 17:19:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:19:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 17:19:20,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:19:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-21 17:19:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821854344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:21,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:19:21,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-08-21 17:19:21,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508394318] [2021-08-21 17:19:21,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 17:19:21,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:19:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 17:19:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:19:21,150 INFO L87 Difference]: Start difference. First operand 6940 states and 8707 transitions. Second operand has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 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 17:19:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:19:21,890 INFO L93 Difference]: Finished difference Result 7532 states and 9451 transitions. [2021-08-21 17:19:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 17:19:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 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 223 [2021-08-21 17:19:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:19:21,899 INFO L225 Difference]: With dead ends: 7532 [2021-08-21 17:19:21,899 INFO L226 Difference]: Without dead ends: 7532 [2021-08-21 17:19:21,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 951.2ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 17:19:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7532 states. [2021-08-21 17:19:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7532 to 7310. [2021-08-21 17:19:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 7309 states have (on average 1.2548912299904227) internal successors, (9172), 7309 states have internal predecessors, (9172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:21,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 9172 transitions. [2021-08-21 17:19:21,969 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 9172 transitions. Word has length 223 [2021-08-21 17:19:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:19:21,969 INFO L470 AbstractCegarLoop]: Abstraction has 7310 states and 9172 transitions. [2021-08-21 17:19:21,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 41 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 17:19:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 9172 transitions. [2021-08-21 17:19:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-08-21 17:19:21,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:19:21,979 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 9, 9, 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, 1, 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 17:19:22,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 17:19:22,192 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,SelfDestructingSolverStorable21 [2021-08-21 17:19:22,193 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:19:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:19:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash 776974983, now seen corresponding path program 20 times [2021-08-21 17:19:22,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:19:22,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031161724] [2021-08-21 17:19:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:19:22,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:19:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:19:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-21 17:19:22,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:19:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031161724] [2021-08-21 17:19:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031161724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096673124] [2021-08-21 17:19:22,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:19:22,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:19:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:19:22,940 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 17:19:22,981 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 17:19:24,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:19:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:19:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 17:19:24,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:19:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-21 17:19:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096673124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:24,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:19:24,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-08-21 17:19:24,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744796056] [2021-08-21 17:19:24,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 17:19:24,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:19:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 17:19:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:19:24,924 INFO L87 Difference]: Start difference. First operand 7310 states and 9172 transitions. Second operand has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:19:25,747 INFO L93 Difference]: Finished difference Result 7680 states and 9637 transitions. [2021-08-21 17:19:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 17:19:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 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 228 [2021-08-21 17:19:25,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:19:25,755 INFO L225 Difference]: With dead ends: 7680 [2021-08-21 17:19:25,755 INFO L226 Difference]: Without dead ends: 7680 [2021-08-21 17:19:25,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1230.1ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 17:19:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7680 states. [2021-08-21 17:19:25,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7680 to 7680. [2021-08-21 17:19:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7680 states, 7679 states have (on average 1.2549811173329861) internal successors, (9637), 7679 states have internal predecessors, (9637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7680 states to 7680 states and 9637 transitions. [2021-08-21 17:19:25,905 INFO L78 Accepts]: Start accepts. Automaton has 7680 states and 9637 transitions. Word has length 228 [2021-08-21 17:19:25,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:19:25,905 INFO L470 AbstractCegarLoop]: Abstraction has 7680 states and 9637 transitions. [2021-08-21 17:19:25,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9302325581395348) internal successors, (169), 43 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 7680 states and 9637 transitions. [2021-08-21 17:19:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-08-21 17:19:25,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:19:25,934 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 9, 9, 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, 1, 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 17:19:25,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 17:19:26,134 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,SelfDestructingSolverStorable22 [2021-08-21 17:19:26,134 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:19:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:19:26,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1125533783, now seen corresponding path program 21 times [2021-08-21 17:19:26,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:19:26,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711879429] [2021-08-21 17:19:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:19:26,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:19:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:19:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 0 proven. 1267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:19:27,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:19:27,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711879429] [2021-08-21 17:19:27,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711879429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:27,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501510863] [2021-08-21 17:19:27,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:19:27,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:19:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:19:27,137 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 17:19:27,163 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 17:19:28,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 17:19:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:19:28,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:19:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:19:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-21 17:19:29,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501510863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:19:29,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:19:29,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 21] total 63 [2021-08-21 17:19:29,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097518271] [2021-08-21 17:19:29,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 17:19:29,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:19:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 17:19:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=3222, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 17:19:29,464 INFO L87 Difference]: Start difference. First operand 7680 states and 9637 transitions. Second operand has 63 states, 63 states have (on average 5.603174603174603) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:19:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:19:58,849 INFO L93 Difference]: Finished difference Result 133080 states and 167566 transitions. [2021-08-21 17:19:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 879 states. [2021-08-21 17:19:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.603174603174603) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 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 233 [2021-08-21 17:19:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:19:59,259 INFO L225 Difference]: With dead ends: 133080 [2021-08-21 17:19:59,260 INFO L226 Difference]: Without dead ends: 133080 [2021-08-21 17:19:59,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1406 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 898 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410940 ImplicationChecksByTransitivity, 27368.9ms TimeCoverageRelationStatistics Valid=162507, Invalid=646593, Unknown=0, NotChecked=0, Total=809100 [2021-08-21 17:19:59,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133080 states. [2021-08-21 17:20:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133080 to 8504. [2021-08-21 17:20:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8504 states, 8503 states have (on average 1.2544984123250618) internal successors, (10667), 8503 states have internal predecessors, (10667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:20:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8504 states to 8504 states and 10667 transitions. [2021-08-21 17:20:00,482 INFO L78 Accepts]: Start accepts. Automaton has 8504 states and 10667 transitions. Word has length 233 [2021-08-21 17:20:00,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:20:00,483 INFO L470 AbstractCegarLoop]: Abstraction has 8504 states and 10667 transitions. [2021-08-21 17:20:00,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.603174603174603) internal successors, (353), 63 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:20:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8504 states and 10667 transitions. [2021-08-21 17:20:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-08-21 17:20:00,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:20:00,492 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 10, 10, 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, 1, 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 17:20:00,512 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 17:20:00,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:20:00,692 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:20:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:20:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1572399310, now seen corresponding path program 22 times [2021-08-21 17:20:00,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:20:00,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209516994] [2021-08-21 17:20:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:20:00,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:20:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:20:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 1340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:20:01,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:20:01,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209516994] [2021-08-21 17:20:01,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209516994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:20:01,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130217613] [2021-08-21 17:20:01,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:20:01,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:20:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:20:01,333 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 17:20:01,334 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 17:20:02,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:20:02,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:20:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:20:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:20:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-21 17:20:03,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130217613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:20:03,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:20:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-08-21 17:20:03,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242239993] [2021-08-21 17:20:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 17:20:03,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:20:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 17:20:03,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 17:20:03,721 INFO L87 Difference]: Start difference. First operand 8504 states and 10667 transitions. Second operand has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:20:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:20:42,389 INFO L93 Difference]: Finished difference Result 169156 states and 212829 transitions. [2021-08-21 17:20:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1102 states. [2021-08-21 17:20:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 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 241 [2021-08-21 17:20:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:20:42,695 INFO L225 Difference]: With dead ends: 169156 [2021-08-21 17:20:42,696 INFO L226 Difference]: Without dead ends: 169156 [2021-08-21 17:20:42,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1714 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 1123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664038 ImplicationChecksByTransitivity, 35380.7ms TimeCoverageRelationStatistics Valid=255553, Invalid=1008947, Unknown=0, NotChecked=0, Total=1264500 [2021-08-21 17:20:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169156 states. [2021-08-21 17:20:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169156 to 9328. [2021-08-21 17:20:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.2541009971051784) internal successors, (11697), 9327 states have internal predecessors, (11697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:20:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 11697 transitions. [2021-08-21 17:20:43,757 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 11697 transitions. Word has length 241 [2021-08-21 17:20:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:20:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 11697 transitions. [2021-08-21 17:20:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.507462686567164) internal successors, (369), 67 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:20:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 11697 transitions. [2021-08-21 17:20:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-08-21 17:20:43,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:20:43,766 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:20:43,798 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 17:20:43,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:20:43,981 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:20:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:20:43,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1185621235, now seen corresponding path program 23 times [2021-08-21 17:20:43,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:20:43,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614926965] [2021-08-21 17:20:43,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:20:43,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:20:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:20:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 1421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:20:44,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:20:44,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614926965] [2021-08-21 17:20:44,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614926965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:20:44,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64285766] [2021-08-21 17:20:44,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:20:44,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:20:44,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:20:44,895 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 17:20:44,896 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 17:20:46,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-21 17:20:46,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:20:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 17:20:46,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:20:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1421 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-21 17:20:47,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64285766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:20:47,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:20:47,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2021-08-21 17:20:47,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138754246] [2021-08-21 17:20:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 17:20:47,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:20:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 17:20:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=4148, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 17:20:47,331 INFO L87 Difference]: Start difference. First operand 9328 states and 11697 transitions. Second operand has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:21:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:21:51,089 INFO L93 Difference]: Finished difference Result 210189 states and 264286 transitions. [2021-08-21 17:21:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1363 states. [2021-08-21 17:21:51,090 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 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 249 [2021-08-21 17:21:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:21:51,513 INFO L225 Difference]: With dead ends: 210189 [2021-08-21 17:21:51,513 INFO L226 Difference]: Without dead ends: 210189 [2021-08-21 17:21:51,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 1386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039498 ImplicationChecksByTransitivity, 58566.8ms TimeCoverageRelationStatistics Valid=390931, Invalid=1534225, Unknown=0, NotChecked=0, Total=1925156 [2021-08-21 17:21:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210189 states. [2021-08-21 17:21:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210189 to 10152. [2021-08-21 17:21:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10152 states, 10151 states have (on average 1.2537681016648605) internal successors, (12727), 10151 states have internal predecessors, (12727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:21:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10152 states to 10152 states and 12727 transitions. [2021-08-21 17:21:53,330 INFO L78 Accepts]: Start accepts. Automaton has 10152 states and 12727 transitions. Word has length 249 [2021-08-21 17:21:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:21:53,330 INFO L470 AbstractCegarLoop]: Abstraction has 10152 states and 12727 transitions. [2021-08-21 17:21:53,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 5.422535211267606) internal successors, (385), 71 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:21:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 10152 states and 12727 transitions. [2021-08-21 17:21:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-08-21 17:21:53,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:21:53,341 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:21:53,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 17:21:53,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 17:21:53,562 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:21:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:21:53,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1786418152, now seen corresponding path program 24 times [2021-08-21 17:21:53,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:21:53,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494909227] [2021-08-21 17:21:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:21:53,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:21:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:21:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:21:54,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:21:54,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494909227] [2021-08-21 17:21:54,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494909227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:21:54,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639453891] [2021-08-21 17:21:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:21:54,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:21:54,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:21:54,598 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 17:21:54,599 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 17:21:56,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-21 17:21:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:21:56,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:21:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:21:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-21 17:21:57,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639453891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:21:57,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:21:57,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-08-21 17:21:57,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112548328] [2021-08-21 17:21:57,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-21 17:21:57,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:21:57,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-21 17:21:57,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4653, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 17:21:57,337 INFO L87 Difference]: Start difference. First operand 10152 states and 12727 transitions. Second operand has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:23:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:23:27,793 INFO L93 Difference]: Finished difference Result 256117 states and 321857 transitions. [2021-08-21 17:23:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1665 states. [2021-08-21 17:23:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 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 257 [2021-08-21 17:23:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:23:28,266 INFO L225 Difference]: With dead ends: 256117 [2021-08-21 17:23:28,266 INFO L226 Difference]: Without dead ends: 256117 [2021-08-21 17:23:28,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2487 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 1690 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581443 ImplicationChecksByTransitivity, 81881.0ms TimeCoverageRelationStatistics Valid=583037, Invalid=2278135, Unknown=0, NotChecked=0, Total=2861172 [2021-08-21 17:23:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256117 states. [2021-08-21 17:23:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256117 to 10976. [2021-08-21 17:23:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10976 states, 10975 states have (on average 1.2534851936218678) internal successors, (13757), 10975 states have internal predecessors, (13757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:23:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10976 states to 10976 states and 13757 transitions. [2021-08-21 17:23:30,186 INFO L78 Accepts]: Start accepts. Automaton has 10976 states and 13757 transitions. Word has length 257 [2021-08-21 17:23:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:23:30,187 INFO L470 AbstractCegarLoop]: Abstraction has 10976 states and 13757 transitions. [2021-08-21 17:23:30,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 5.346666666666667) internal successors, (401), 75 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:23:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 10976 states and 13757 transitions. [2021-08-21 17:23:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-08-21 17:23:30,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:23:30,212 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:23:30,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 17:23:30,437 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,SelfDestructingSolverStorable26 [2021-08-21 17:23:30,437 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 17:23:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:23:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash 754139587, now seen corresponding path program 25 times [2021-08-21 17:23:30,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:23:30,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250497539] [2021-08-21 17:23:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:23:30,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:23:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:23:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 1607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:23:31,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:23:31,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250497539] [2021-08-21 17:23:31,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250497539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:23:31,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855818540] [2021-08-21 17:23:31,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:23:31,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:23:31,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:23:31,350 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 17:23:31,351 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 17:23:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:23:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 17:23:33,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:23:34,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1607 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2021-08-21 17:23:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855818540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:23:34,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:23:34,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 29] total 79 [2021-08-21 17:23:34,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105832283] [2021-08-21 17:23:34,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 17:23:34,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:23:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 17:23:34,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5186, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 17:23:34,447 INFO L87 Difference]: Start difference. First operand 10976 states and 13757 transitions. Second operand has 79 states, 79 states have (on average 5.2784810126582276) internal successors, (417), 79 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)