/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.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 11:46:25,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:46:25,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:46:25,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 11:46:25,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 11:46:25,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 11:46:25,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 11:46:25,748 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.epf [2021-08-21 11:46:25,778 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:46:25,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:46:25,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:46:25,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:46:25,781 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:46:25,781 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:46:25,781 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:46:25,782 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:46:25,782 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:46:25,782 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:46:25,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:46:25,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:46:25,783 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:46:25,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:46:25,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:46:25,785 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:46:26,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:46:26,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:46:26,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:46:26,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 11:46:26,046 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 11:46:26,047 INFO L432 ainManager$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 11:46:26,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ec8b2a7/057d7e89406b4deb9febbcec8948d3c2/FLAG75db1311c [2021-08-21 11:46:26,570 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 11:46:26,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2021-08-21 11:46:26,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ec8b2a7/057d7e89406b4deb9febbcec8948d3c2/FLAG75db1311c [2021-08-21 11:46:26,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7ec8b2a7/057d7e89406b4deb9febbcec8948d3c2 [2021-08-21 11:46:26,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:46:26,608 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 11:46:26,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 11:46:26,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 11:46:26,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 11:46:26,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:46:26" (1/1) ... [2021-08-21 11:46:26,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f227f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:26, skipping insertion in model container [2021-08-21 11:46:26,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:46:26" (1/1) ... [2021-08-21 11:46:26,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 11:46:26,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 11:46:26,791 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 11:46:27,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 11:46:27,079 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 11:46:27,086 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 11:46:27,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 11:46:27,155 INFO L208 MainTranslator]: Completed translation [2021-08-21 11:46:27,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27 WrapperNode [2021-08-21 11:46:27,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 11:46:27,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:46:27,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:46:27,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:46:27,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:46:27,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:46:27,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:46:27,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:46:27,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:46:27,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:46:27,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:46:27,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:46:27,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (1/1) ... [2021-08-21 11:46:27,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:46:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:27,251 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 11:46:27,254 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 11:46:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 11:46:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 11:46:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-21 11:46:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2021-08-21 11:46:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2021-08-21 11:46:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 11:46:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 11:46:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:46:27,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:46:27,281 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 11:46:27,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:46:27,611 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-21 11:46:27,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:46:27 BoogieIcfgContainer [2021-08-21 11:46:27,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:46:27,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:46:27,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:46:27,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:46:27,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:46:26" (1/3) ... [2021-08-21 11:46:27,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d85b46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:46:27, skipping insertion in model container [2021-08-21 11:46:27,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:46:27" (2/3) ... [2021-08-21 11:46:27,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d85b46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:46:27, skipping insertion in model container [2021-08-21 11:46:27,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:46:27" (3/3) ... [2021-08-21 11:46:27,620 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2021-08-21 11:46:27,623 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:46:27,623 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:46:27,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:46:27,624 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:46:27,649 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,650 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,650 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,650 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,650 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,651 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,652 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,652 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,652 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,652 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,652 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,653 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,654 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,654 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,654 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,655 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,655 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,655 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,655 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,656 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,656 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,656 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,656 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,657 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,657 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,657 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,659 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,659 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,660 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,660 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,660 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,660 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,660 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,660 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:46:27,669 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-08-21 11:46:27,705 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:46:27,711 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 11:46:27,712 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-21 11:46:27,723 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 91 places, 94 transitions, 196 flow [2021-08-21 11:46:27,754 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 11:46:27,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:27,773 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 11:46:27,773 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1512510452, now seen corresponding path program 1 times [2021-08-21 11:46:27,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:27,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807200037] [2021-08-21 11:46:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:27,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:27,983 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 11:46:27,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:27,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807200037] [2021-08-21 11:46:27,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807200037] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:46:27,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:46:27,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 11:46:27,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205984047] [2021-08-21 11:46:27,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-21 11:46:27,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-21 11:46:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-21 11:46:27,999 INFO L87 Difference]: Start difference. First operand has 344 states, 343 states have (on average 2.0262390670553936) internal successors, (695), 343 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 11:46:28,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:28,033 INFO L93 Difference]: Finished difference Result 342 states and 642 transitions. [2021-08-21 11:46:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-21 11:46:28,035 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 11:46:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:28,042 INFO L225 Difference]: With dead ends: 342 [2021-08-21 11:46:28,042 INFO L226 Difference]: Without dead ends: 297 [2021-08-21 11:46:28,043 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 11:46:28,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-21 11:46:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2021-08-21 11:46:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.864864864864865) internal successors, (552), 296 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 552 transitions. [2021-08-21 11:46:28,079 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 552 transitions. Word has length 61 [2021-08-21 11:46:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:28,080 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 552 transitions. [2021-08-21 11:46:28,080 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 11:46:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 552 transitions. [2021-08-21 11:46:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 11:46:28,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:28,083 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 11:46:28,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:46:28,084 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 474971308, now seen corresponding path program 1 times [2021-08-21 11:46:28,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:28,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432651933] [2021-08-21 11:46:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:28,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:28,156 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 11:46:28,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432651933] [2021-08-21 11:46:28,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432651933] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:46:28,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:46:28,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 11:46:28,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195577337] [2021-08-21 11:46:28,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:46:28,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:46:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:46:28,160 INFO L87 Difference]: Start difference. First operand 297 states and 552 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 11:46:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:28,176 INFO L93 Difference]: Finished difference Result 357 states and 672 transitions. [2021-08-21 11:46:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:46:28,177 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 11:46:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:28,179 INFO L225 Difference]: With dead ends: 357 [2021-08-21 11:46:28,179 INFO L226 Difference]: Without dead ends: 357 [2021-08-21 11:46:28,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 11:46:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-08-21 11:46:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 312. [2021-08-21 11:46:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.8713826366559485) internal successors, (582), 311 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 582 transitions. [2021-08-21 11:46:28,195 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 582 transitions. Word has length 61 [2021-08-21 11:46:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:28,195 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 582 transitions. [2021-08-21 11:46:28,195 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 11:46:28,196 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 582 transitions. [2021-08-21 11:46:28,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 11:46:28,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:28,197 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 11:46:28,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:46:28,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash 270890588, now seen corresponding path program 1 times [2021-08-21 11:46:28,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:28,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433030406] [2021-08-21 11:46:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:28,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:28,288 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 11:46:28,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:28,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433030406] [2021-08-21 11:46:28,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433030406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:28,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730525347] [2021-08-21 11:46:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:28,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:28,297 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 11:46:28,297 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 11:46:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-21 11:46:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:28,635 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 11:46:28,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730525347] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:46:28,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 11:46:28,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-21 11:46:28,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631919187] [2021-08-21 11:46:28,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 11:46:28,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 11:46:28,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:46:28,637 INFO L87 Difference]: Start difference. First operand 312 states and 582 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 11:46:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:28,669 INFO L93 Difference]: Finished difference Result 438 states and 834 transitions. [2021-08-21 11:46:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 11:46:28,669 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 11:46:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:28,671 INFO L225 Difference]: With dead ends: 438 [2021-08-21 11:46:28,671 INFO L226 Difference]: Without dead ends: 438 [2021-08-21 11:46:28,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:46:28,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-21 11:46:28,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 330. [2021-08-21 11:46:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.878419452887538) internal successors, (618), 329 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 618 transitions. [2021-08-21 11:46:28,679 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 618 transitions. Word has length 66 [2021-08-21 11:46:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 618 transitions. [2021-08-21 11:46:28,680 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 11:46:28,680 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 618 transitions. [2021-08-21 11:46:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-21 11:46:28,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:28,681 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 11:46:28,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 11:46:28,890 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 11:46:28,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:28,891 INFO L82 PathProgramCache]: Analyzing trace with hash 564031543, now seen corresponding path program 1 times [2021-08-21 11:46:28,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:28,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115759200] [2021-08-21 11:46:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:28,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:28,965 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 11:46:28,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:28,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115759200] [2021-08-21 11:46:28,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115759200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:28,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521295484] [2021-08-21 11:46:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:28,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:28,969 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 11:46:28,970 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 11:46:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 11:46:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:29,279 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 11:46:29,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521295484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:29,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:29,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 11:46:29,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990525038] [2021-08-21 11:46:29,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:46:29,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:46:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:46:29,282 INFO L87 Difference]: Start difference. First operand 330 states and 618 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 11:46:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:29,321 INFO L93 Difference]: Finished difference Result 458 states and 874 transitions. [2021-08-21 11:46:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:46:29,322 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 11:46:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:29,324 INFO L225 Difference]: With dead ends: 458 [2021-08-21 11:46:29,324 INFO L226 Difference]: Without dead ends: 458 [2021-08-21 11:46:29,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:46:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-21 11:46:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 410. [2021-08-21 11:46:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.902200488997555) internal successors, (778), 409 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 778 transitions. [2021-08-21 11:46:29,333 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 778 transitions. Word has length 74 [2021-08-21 11:46:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:29,333 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 778 transitions. [2021-08-21 11:46:29,333 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 11:46:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 778 transitions. [2021-08-21 11:46:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 11:46:29,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:29,335 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 11:46:29,354 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 11:46:29,544 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 11:46:29,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash -780159865, now seen corresponding path program 2 times [2021-08-21 11:46:29,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:29,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268600715] [2021-08-21 11:46:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:29,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:29,590 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 11:46:29,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268600715] [2021-08-21 11:46:29,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268600715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442442836] [2021-08-21 11:46:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:46:29,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:29,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:29,591 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 11:46:29,606 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 11:46:29,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:46:29,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 11:46:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:29,908 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 11:46:29,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442442836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:29,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:29,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 11:46:29,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588151581] [2021-08-21 11:46:29,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:46:29,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:46:29,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:46:29,910 INFO L87 Difference]: Start difference. First operand 410 states and 778 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 11:46:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:29,947 INFO L93 Difference]: Finished difference Result 732 states and 1422 transitions. [2021-08-21 11:46:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 11:46:29,948 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 11:46:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:29,951 INFO L225 Difference]: With dead ends: 732 [2021-08-21 11:46:29,951 INFO L226 Difference]: Without dead ends: 732 [2021-08-21 11:46:29,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-21 11:46:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-08-21 11:46:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 594. [2021-08-21 11:46:29,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.9325463743676223) internal successors, (1146), 593 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1146 transitions. [2021-08-21 11:46:29,965 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1146 transitions. Word has length 79 [2021-08-21 11:46:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:29,965 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1146 transitions. [2021-08-21 11:46:29,965 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 11:46:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1146 transitions. [2021-08-21 11:46:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-21 11:46:29,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:29,967 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 11:46:29,993 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 11:46:30,172 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 11:46:30,173 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:30,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1666798434, now seen corresponding path program 3 times [2021-08-21 11:46:30,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:30,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212894724] [2021-08-21 11:46:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:30,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:30,265 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 11:46:30,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:30,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212894724] [2021-08-21 11:46:30,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212894724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:30,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549347974] [2021-08-21 11:46:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:46:30,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:30,269 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 11:46:30,292 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 11:46:30,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:46:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:30,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 11:46:30,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:30,706 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 11:46:30,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549347974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:30,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:30,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 11:46:30,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239315651] [2021-08-21 11:46:30,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 11:46:30,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:30,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 11:46:30,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:46:30,708 INFO L87 Difference]: Start difference. First operand 594 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:31,430 INFO L93 Difference]: Finished difference Result 1220 states and 2398 transitions. [2021-08-21 11:46:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 11:46:31,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-08-21 11:46:31,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:31,435 INFO L225 Difference]: With dead ends: 1220 [2021-08-21 11:46:31,435 INFO L226 Difference]: Without dead ends: 1220 [2021-08-21 11:46:31,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 583.8ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 11:46:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-08-21 11:46:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 938. [2021-08-21 11:46:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.9573105656350054) internal successors, (1834), 937 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1834 transitions. [2021-08-21 11:46:31,458 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1834 transitions. Word has length 87 [2021-08-21 11:46:31,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:31,459 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1834 transitions. [2021-08-21 11:46:31,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:31,459 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1834 transitions. [2021-08-21 11:46:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 11:46:31,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:31,462 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 11:46:31,492 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 11:46:31,665 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 11:46:31,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:31,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1700492525, now seen corresponding path program 4 times [2021-08-21 11:46:31,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:31,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657799716] [2021-08-21 11:46:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:31,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:31,756 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 11:46:31,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:31,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657799716] [2021-08-21 11:46:31,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657799716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:31,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685523244] [2021-08-21 11:46:31,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:46:31,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:31,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:31,761 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 11:46:31,773 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 11:46:31,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:46:31,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:46:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:32,147 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 11:46:32,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685523244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:32,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:32,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-21 11:46:32,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772304231] [2021-08-21 11:46:32,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 11:46:32,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 11:46:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:46:32,152 INFO L87 Difference]: Start difference. First operand 938 states and 1834 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 11:46:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:32,214 INFO L93 Difference]: Finished difference Result 1194 states and 2346 transitions. [2021-08-21 11:46:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:46:32,214 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 11:46:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:32,218 INFO L225 Difference]: With dead ends: 1194 [2021-08-21 11:46:32,218 INFO L226 Difference]: Without dead ends: 1194 [2021-08-21 11:46:32,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:46:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-21 11:46:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1098. [2021-08-21 11:46:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 1.9635369188696445) internal successors, (2154), 1097 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 2154 transitions. [2021-08-21 11:46:32,237 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 2154 transitions. Word has length 100 [2021-08-21 11:46:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:32,237 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 2154 transitions. [2021-08-21 11:46:32,237 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 11:46:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 2154 transitions. [2021-08-21 11:46:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-21 11:46:32,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:32,239 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 11:46:32,260 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 11:46:32,452 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 11:46:32,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:32,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2143614269, now seen corresponding path program 5 times [2021-08-21 11:46:32,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:32,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731665504] [2021-08-21 11:46:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:32,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:32,548 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 11:46:32,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:32,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731665504] [2021-08-21 11:46:32,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731665504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:32,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200682977] [2021-08-21 11:46:32,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:46:32,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:32,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:32,553 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 11:46:32,562 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 11:46:32,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:46:32,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:32,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 11:46:32,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:33,001 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 11:46:33,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200682977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:33,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:33,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 11:46:33,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071303429] [2021-08-21 11:46:33,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:46:33,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:46:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:46:33,014 INFO L87 Difference]: Start difference. First operand 1098 states and 2154 transitions. Second operand has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:35,386 INFO L93 Difference]: Finished difference Result 1928 states and 3814 transitions. [2021-08-21 11:46:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-08-21 11:46:35,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-21 11:46:35,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:35,393 INFO L225 Difference]: With dead ends: 1928 [2021-08-21 11:46:35,393 INFO L226 Difference]: Without dead ends: 1928 [2021-08-21 11:46:35,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11147 ImplicationChecksByTransitivity, 2091.2ms TimeCoverageRelationStatistics Valid=5484, Invalid=20598, Unknown=0, NotChecked=0, Total=26082 [2021-08-21 11:46:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-08-21 11:46:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1562. [2021-08-21 11:46:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 1.974375400384369) internal successors, (3082), 1561 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 3082 transitions. [2021-08-21 11:46:35,428 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 3082 transitions. Word has length 105 [2021-08-21 11:46:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:35,428 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 3082 transitions. [2021-08-21 11:46:35,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.944444444444445) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 3082 transitions. [2021-08-21 11:46:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-21 11:46:35,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:35,431 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 11:46:35,451 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 11:46:35,640 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 11:46:35,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:35,642 INFO L82 PathProgramCache]: Analyzing trace with hash -749011000, now seen corresponding path program 6 times [2021-08-21 11:46:35,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:35,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325086992] [2021-08-21 11:46:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:35,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:35,730 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 11:46:35,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:35,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325086992] [2021-08-21 11:46:35,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325086992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:35,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482635606] [2021-08-21 11:46:35,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:46:35,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:35,731 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 11:46:35,734 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 11:46:35,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:46:35,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:35,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:46:35,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-08-21 11:46:36,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482635606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:36,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:36,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 11:46:36,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946932229] [2021-08-21 11:46:36,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:46:36,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:46:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:46:36,363 INFO L87 Difference]: Start difference. First operand 1562 states and 3082 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:40,784 INFO L93 Difference]: Finished difference Result 2526 states and 5010 transitions. [2021-08-21 11:46:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-08-21 11:46:40,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-08-21 11:46:40,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:40,792 INFO L225 Difference]: With dead ends: 2526 [2021-08-21 11:46:40,792 INFO L226 Difference]: Without dead ends: 2526 [2021-08-21 11:46:40,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27703 ImplicationChecksByTransitivity, 4058.4ms TimeCoverageRelationStatistics Valid=12186, Invalid=49070, Unknown=0, NotChecked=0, Total=61256 [2021-08-21 11:46:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-08-21 11:46:40,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2106. [2021-08-21 11:46:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 1.9809976247030878) internal successors, (4170), 2105 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 4170 transitions. [2021-08-21 11:46:40,835 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 4170 transitions. Word has length 118 [2021-08-21 11:46:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:40,835 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 4170 transitions. [2021-08-21 11:46:40,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 4170 transitions. [2021-08-21 11:46:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-21 11:46:40,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:40,839 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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 11:46:40,857 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 11:46:41,057 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 11:46:41,057 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash -151483917, now seen corresponding path program 7 times [2021-08-21 11:46:41,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:41,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851052997] [2021-08-21 11:46:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:41,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 11:46:41,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:41,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851052997] [2021-08-21 11:46:41,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851052997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:41,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114331603] [2021-08-21 11:46:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:46:41,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:41,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:41,209 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 11:46:41,251 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 11:46:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:41,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:46:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 11:46:41,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114331603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:41,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:41,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-21 11:46:41,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799036787] [2021-08-21 11:46:41,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:46:41,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:41,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:46:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:46:41,792 INFO L87 Difference]: Start difference. First operand 2106 states and 4170 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 11:46:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:41,940 INFO L93 Difference]: Finished difference Result 2490 states and 4938 transitions. [2021-08-21 11:46:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:46:41,940 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 131 [2021-08-21 11:46:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:41,947 INFO L225 Difference]: With dead ends: 2490 [2021-08-21 11:46:41,948 INFO L226 Difference]: Without dead ends: 2490 [2021-08-21 11:46:41,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:46:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-08-21 11:46:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2346. [2021-08-21 11:46:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 1.9829424307036247) internal successors, (4650), 2345 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 4650 transitions. [2021-08-21 11:46:41,989 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 4650 transitions. Word has length 131 [2021-08-21 11:46:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:41,989 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 4650 transitions. [2021-08-21 11:46:41,989 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 11:46:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 4650 transitions. [2021-08-21 11:46:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-21 11:46:41,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:41,995 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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 11:46:42,020 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 11:46:42,215 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 11:46:42,216 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2121465763, now seen corresponding path program 8 times [2021-08-21 11:46:42,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:42,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651314838] [2021-08-21 11:46:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:42,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 11:46:42,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:42,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651314838] [2021-08-21 11:46:42,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651314838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:42,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194588018] [2021-08-21 11:46:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:46:42,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:42,353 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 11:46:42,396 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 11:46:42,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:46:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:42,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 11:46:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 11:46:42,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194588018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:42,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:42,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-08-21 11:46:42,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126891] [2021-08-21 11:46:42,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:46:42,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:42,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:46:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:46:42,973 INFO L87 Difference]: Start difference. First operand 2346 states and 4650 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 11:46:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:43,137 INFO L93 Difference]: Finished difference Result 2730 states and 5418 transitions. [2021-08-21 11:46:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:46:43,137 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 136 [2021-08-21 11:46:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:43,144 INFO L225 Difference]: With dead ends: 2730 [2021-08-21 11:46:43,144 INFO L226 Difference]: Without dead ends: 2730 [2021-08-21 11:46:43,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:46:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2021-08-21 11:46:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2586. [2021-08-21 11:46:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 1.9845261121856868) internal successors, (5130), 2585 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5130 transitions. [2021-08-21 11:46:43,181 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5130 transitions. Word has length 136 [2021-08-21 11:46:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:43,181 INFO L470 AbstractCegarLoop]: Abstraction has 2586 states and 5130 transitions. [2021-08-21 11:46:43,181 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 11:46:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5130 transitions. [2021-08-21 11:46:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-21 11:46:43,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:43,185 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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 11:46:43,206 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 11:46:43,398 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 11:46:43,398 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:43,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1720621043, now seen corresponding path program 9 times [2021-08-21 11:46:43,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:43,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367241475] [2021-08-21 11:46:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:43,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-21 11:46:43,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:43,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367241475] [2021-08-21 11:46:43,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367241475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:43,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161126150] [2021-08-21 11:46:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:46:43,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:43,550 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 11:46:43,551 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 11:46:43,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:46:43,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:43,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:46:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-08-21 11:46:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161126150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:44,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:44,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 30 [2021-08-21 11:46:44,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392722105] [2021-08-21 11:46:44,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 11:46:44,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 11:46:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:46:44,348 INFO L87 Difference]: Start difference. First operand 2586 states and 5130 transitions. Second operand has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:56,810 INFO L93 Difference]: Finished difference Result 3824 states and 7606 transitions. [2021-08-21 11:46:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 443 states. [2021-08-21 11:46:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 states have internal predecessors, (161), 0 states have call successors, (0), 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 141 [2021-08-21 11:46:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:56,820 INFO L225 Difference]: With dead ends: 3824 [2021-08-21 11:46:56,820 INFO L226 Difference]: Without dead ends: 3824 [2021-08-21 11:46:56,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99095 ImplicationChecksByTransitivity, 11611.2ms TimeCoverageRelationStatistics Valid=38804, Invalid=168676, Unknown=0, NotChecked=0, Total=207480 [2021-08-21 11:46:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-08-21 11:46:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3290. [2021-08-21 11:46:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.987838248707814) internal successors, (6538), 3289 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6538 transitions. [2021-08-21 11:46:56,888 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6538 transitions. Word has length 141 [2021-08-21 11:46:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:56,889 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 6538 transitions. [2021-08-21 11:46:56,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.366666666666666) internal successors, (161), 30 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6538 transitions. [2021-08-21 11:46:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-21 11:46:56,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:56,895 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 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 11:46:56,914 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 11:46:57,116 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 11:46:57,117 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:57,117 INFO L82 PathProgramCache]: Analyzing trace with hash -427920258, now seen corresponding path program 10 times [2021-08-21 11:46:57,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:57,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239210365] [2021-08-21 11:46:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:57,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 11:46:57,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:57,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239210365] [2021-08-21 11:46:57,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239210365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:57,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913090196] [2021-08-21 11:46:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:46:57,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:57,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:57,305 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 11:46:57,340 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 11:46:57,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:46:57,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 11:46:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 11:46:58,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913090196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:58,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:58,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-21 11:46:58,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213503794] [2021-08-21 11:46:58,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:46:58,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:46:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:46:58,021 INFO L87 Difference]: Start difference. First operand 3290 states and 6538 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 11:46:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:46:58,302 INFO L93 Difference]: Finished difference Result 3738 states and 7434 transitions. [2021-08-21 11:46:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:46:58,303 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 154 [2021-08-21 11:46:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:46:58,312 INFO L225 Difference]: With dead ends: 3738 [2021-08-21 11:46:58,312 INFO L226 Difference]: Without dead ends: 3738 [2021-08-21 11:46:58,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:46:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-08-21 11:46:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3570. [2021-08-21 11:46:58,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3570 states, 3569 states have (on average 1.988792378817596) internal successors, (7098), 3569 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:46:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 7098 transitions. [2021-08-21 11:46:58,365 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 7098 transitions. Word has length 154 [2021-08-21 11:46:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:46:58,365 INFO L470 AbstractCegarLoop]: Abstraction has 3570 states and 7098 transitions. [2021-08-21 11:46:58,365 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 11:46:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 7098 transitions. [2021-08-21 11:46:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-21 11:46:58,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:46:58,371 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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 11:46:58,396 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 11:46:58,571 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 11:46:58,572 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:46:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:46:58,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1927112498, now seen corresponding path program 11 times [2021-08-21 11:46:58,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:46:58,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657775771] [2021-08-21 11:46:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:46:58,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:46:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:46:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-21 11:46:58,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:46:58,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657775771] [2021-08-21 11:46:58,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657775771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:58,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411241299] [2021-08-21 11:46:58,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:46:58,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:46:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:46:58,781 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 11:46:58,808 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 11:46:59,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 11:46:59,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:46:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:46:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:46:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-08-21 11:46:59,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411241299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:46:59,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:46:59,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 36 [2021-08-21 11:46:59,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841641111] [2021-08-21 11:46:59,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 11:46:59,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:46:59,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 11:46:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:46:59,792 INFO L87 Difference]: Start difference. First operand 3570 states and 7098 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:47:23,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:47:23,858 INFO L93 Difference]: Finished difference Result 5012 states and 9982 transitions. [2021-08-21 11:47:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 641 states. [2021-08-21 11:47:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 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 159 [2021-08-21 11:47:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:47:23,865 INFO L225 Difference]: With dead ends: 5012 [2021-08-21 11:47:23,866 INFO L226 Difference]: Without dead ends: 5012 [2021-08-21 11:47:23,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1423 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 655 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210854 ImplicationChecksByTransitivity, 22807.0ms TimeCoverageRelationStatistics Valid=78108, Invalid=352884, Unknown=0, NotChecked=0, Total=430992 [2021-08-21 11:47:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-08-21 11:47:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4394. [2021-08-21 11:47:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4393 states have (on average 1.9908946050534941) internal successors, (8746), 4393 states have internal predecessors, (8746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:47:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 8746 transitions. [2021-08-21 11:47:23,930 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 8746 transitions. Word has length 159 [2021-08-21 11:47:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:47:23,930 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 8746 transitions. [2021-08-21 11:47:23,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:47:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 8746 transitions. [2021-08-21 11:47:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-21 11:47:23,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:47:23,937 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 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 11:47:23,957 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 11:47:24,152 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 11:47:24,153 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:47:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:47:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2019057241, now seen corresponding path program 12 times [2021-08-21 11:47:24,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:47:24,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774128619] [2021-08-21 11:47:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:47:24,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:47:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:47:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:24,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:47:24,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774128619] [2021-08-21 11:47:24,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774128619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:24,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583651081] [2021-08-21 11:47:24,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:47:24,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:47:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:47:24,385 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 11:47:24,421 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 11:47:24,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 11:47:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:47:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:47:24,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:47:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:25,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583651081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:25,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:47:25,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-08-21 11:47:25,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68439111] [2021-08-21 11:47:25,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 11:47:25,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:47:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 11:47:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:47:25,268 INFO L87 Difference]: Start difference. First operand 4394 states and 8746 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 11:47:25,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:47:25,581 INFO L93 Difference]: Finished difference Result 4906 states and 9770 transitions. [2021-08-21 11:47:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:47:25,581 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 172 [2021-08-21 11:47:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:47:25,588 INFO L225 Difference]: With dead ends: 4906 [2021-08-21 11:47:25,588 INFO L226 Difference]: Without dead ends: 4906 [2021-08-21 11:47:25,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 386.8ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:47:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-08-21 11:47:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 4714. [2021-08-21 11:47:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4714 states, 4713 states have (on average 1.991512836834288) internal successors, (9386), 4713 states have internal predecessors, (9386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:47:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 9386 transitions. [2021-08-21 11:47:25,690 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 9386 transitions. Word has length 172 [2021-08-21 11:47:25,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:47:25,691 INFO L470 AbstractCegarLoop]: Abstraction has 4714 states and 9386 transitions. [2021-08-21 11:47:25,691 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 11:47:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 9386 transitions. [2021-08-21 11:47:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-08-21 11:47:25,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:47:25,698 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 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 11:47:25,717 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 11:47:25,916 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 11:47:25,916 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:47:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:47:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2029653673, now seen corresponding path program 13 times [2021-08-21 11:47:25,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:47:25,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742269980] [2021-08-21 11:47:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:47:25,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:47:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:47:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:26,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:47:26,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742269980] [2021-08-21 11:47:26,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742269980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:26,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782469811] [2021-08-21 11:47:26,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:47:26,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:47:26,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:47:26,164 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 11:47:26,165 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 11:47:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:47:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 11:47:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:47:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782469811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:27,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:47:27,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-08-21 11:47:27,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615161485] [2021-08-21 11:47:27,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 11:47:27,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:47:27,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 11:47:27,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:47:27,054 INFO L87 Difference]: Start difference. First operand 4714 states and 9386 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 11:47:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:47:27,412 INFO L93 Difference]: Finished difference Result 5226 states and 10410 transitions. [2021-08-21 11:47:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 11:47:27,413 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 177 [2021-08-21 11:47:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:47:27,420 INFO L225 Difference]: With dead ends: 5226 [2021-08-21 11:47:27,420 INFO L226 Difference]: Without dead ends: 5226 [2021-08-21 11:47:27,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:47:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-08-21 11:47:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 5034. [2021-08-21 11:47:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 1.9920524538048878) internal successors, (10026), 5033 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:47:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 10026 transitions. [2021-08-21 11:47:27,555 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 10026 transitions. Word has length 177 [2021-08-21 11:47:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:47:27,556 INFO L470 AbstractCegarLoop]: Abstraction has 5034 states and 10026 transitions. [2021-08-21 11:47:27,556 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 11:47:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 10026 transitions. [2021-08-21 11:47:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-08-21 11:47:27,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:47:27,562 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 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 11:47:27,584 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 11:47:27,762 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 11:47:27,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:47:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:47:27,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1838542759, now seen corresponding path program 14 times [2021-08-21 11:47:27,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:47:27,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140200074] [2021-08-21 11:47:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:47:27,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:47:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:47:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:28,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:47:28,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140200074] [2021-08-21 11:47:28,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140200074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:28,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446010823] [2021-08-21 11:47:28,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:47:28,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:47:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:47:28,084 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 11:47:28,085 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 11:47:28,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:47:28,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:47:28,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 11:47:28,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:47:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446010823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:29,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:47:29,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-08-21 11:47:29,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071188737] [2021-08-21 11:47:29,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 11:47:29,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:47:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 11:47:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:47:29,016 INFO L87 Difference]: Start difference. First operand 5034 states and 10026 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 11:47:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:47:29,419 INFO L93 Difference]: Finished difference Result 5546 states and 11050 transitions. [2021-08-21 11:47:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:47:29,420 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 182 [2021-08-21 11:47:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:47:29,426 INFO L225 Difference]: With dead ends: 5546 [2021-08-21 11:47:29,426 INFO L226 Difference]: Without dead ends: 5546 [2021-08-21 11:47:29,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 11:47:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-08-21 11:47:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 5354. [2021-08-21 11:47:29,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5353 states have (on average 1.9925275546422567) internal successors, (10666), 5353 states have internal predecessors, (10666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:47:29,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 10666 transitions. [2021-08-21 11:47:29,551 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 10666 transitions. Word has length 182 [2021-08-21 11:47:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:47:29,551 INFO L470 AbstractCegarLoop]: Abstraction has 5354 states and 10666 transitions. [2021-08-21 11:47:29,551 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 11:47:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 10666 transitions. [2021-08-21 11:47:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-21 11:47:29,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:47:29,559 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 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 11:47:29,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 11:47:29,768 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 11:47:29,769 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:47:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:47:29,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1071145815, now seen corresponding path program 15 times [2021-08-21 11:47:29,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:47:29,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100232384] [2021-08-21 11:47:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:47:29,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:47:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:47:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-21 11:47:30,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:47:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100232384] [2021-08-21 11:47:30,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100232384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175137666] [2021-08-21 11:47:30,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:47:30,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:47:30,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:47:30,079 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 11:47:30,079 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 11:47:30,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 11:47:30,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:47:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 11:47:30,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:47:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-08-21 11:47:31,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175137666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:47:31,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:47:31,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 17] total 46 [2021-08-21 11:47:31,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339775077] [2021-08-21 11:47:31,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 11:47:31,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:47:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 11:47:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:47:31,342 INFO L87 Difference]: Start difference. First operand 5354 states and 10666 transitions. Second operand has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:48:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:48:28,051 INFO L93 Difference]: Finished difference Result 7140 states and 14238 transitions. [2021-08-21 11:48:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1013 states. [2021-08-21 11:48:28,051 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 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 187 [2021-08-21 11:48:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:48:28,059 INFO L225 Difference]: With dead ends: 7140 [2021-08-21 11:48:28,059 INFO L226 Difference]: Without dead ends: 7140 [2021-08-21 11:48:28,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2193 GetRequests, 1161 SyntacticMatches, 0 SemanticMatches, 1032 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534325 ImplicationChecksByTransitivity, 53723.9ms TimeCoverageRelationStatistics Valid=187686, Invalid=880436, Unknown=0, NotChecked=0, Total=1068122 [2021-08-21 11:48:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-08-21 11:48:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 6378. [2021-08-21 11:48:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6378 states, 6377 states have (on average 1.9937274580523758) internal successors, (12714), 6377 states have internal predecessors, (12714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:48:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6378 states to 6378 states and 12714 transitions. [2021-08-21 11:48:28,180 INFO L78 Accepts]: Start accepts. Automaton has 6378 states and 12714 transitions. Word has length 187 [2021-08-21 11:48:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:48:28,180 INFO L470 AbstractCegarLoop]: Abstraction has 6378 states and 12714 transitions. [2021-08-21 11:48:28,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.5) internal successors, (207), 46 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:48:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6378 states and 12714 transitions. [2021-08-21 11:48:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-08-21 11:48:28,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:48:28,189 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 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 11:48:28,211 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 11:48:28,408 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 11:48:28,409 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:48:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:48:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 497348404, now seen corresponding path program 16 times [2021-08-21 11:48:28,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:48:28,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392846891] [2021-08-21 11:48:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:48:28,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:48:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:48:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-21 11:48:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:48:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392846891] [2021-08-21 11:48:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392846891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:48:28,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804944162] [2021-08-21 11:48:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:48:28,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:48:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:48:28,885 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 11:48:28,886 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 11:48:29,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:48:29,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:48:29,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 11:48:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:48:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-21 11:48:29,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804944162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:48:29,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:48:29,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-08-21 11:48:29,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983805571] [2021-08-21 11:48:29,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 11:48:29,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:48:29,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 11:48:29,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:48:29,968 INFO L87 Difference]: Start difference. First operand 6378 states and 12714 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 11:48:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:48:30,559 INFO L93 Difference]: Finished difference Result 6954 states and 13866 transitions. [2021-08-21 11:48:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:48:30,560 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 200 [2021-08-21 11:48:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:48:30,571 INFO L225 Difference]: With dead ends: 6954 [2021-08-21 11:48:30,571 INFO L226 Difference]: Without dead ends: 6954 [2021-08-21 11:48:30,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 805.4ms TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 11:48:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-08-21 11:48:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 6738. [2021-08-21 11:48:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.9940626391568947) internal successors, (13434), 6737 states have internal predecessors, (13434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:48:30,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 13434 transitions. [2021-08-21 11:48:30,666 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 13434 transitions. Word has length 200 [2021-08-21 11:48:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:48:30,666 INFO L470 AbstractCegarLoop]: Abstraction has 6738 states and 13434 transitions. [2021-08-21 11:48:30,666 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 11:48:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 13434 transitions. [2021-08-21 11:48:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-08-21 11:48:30,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:48:30,676 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 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 11:48:30,706 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 11:48:30,892 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 11:48:30,893 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:48:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:48:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1462368380, now seen corresponding path program 17 times [2021-08-21 11:48:30,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:48:30,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136507509] [2021-08-21 11:48:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:48:30,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:48:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:48:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-08-21 11:48:31,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:48:31,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136507509] [2021-08-21 11:48:31,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136507509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:48:31,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627219763] [2021-08-21 11:48:31,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:48:31,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:48:31,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:48:31,269 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 11:48:31,270 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 11:48:32,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 11:48:32,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:48:32,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 11:48:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:48:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2021-08-21 11:48:32,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627219763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:48:32,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:48:32,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 52 [2021-08-21 11:48:32,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579280056] [2021-08-21 11:48:32,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 11:48:32,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:48:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 11:48:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2231, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:48:32,776 INFO L87 Difference]: Start difference. First operand 6738 states and 13434 transitions. Second operand has 52 states, 52 states have (on average 4.326923076923077) internal successors, (225), 52 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:50:04,554 INFO L93 Difference]: Finished difference Result 8728 states and 17414 transitions. [2021-08-21 11:50:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1301 states. [2021-08-21 11:50:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.326923076923077) internal successors, (225), 52 states have internal predecessors, (225), 0 states have call successors, (0), 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 205 [2021-08-21 11:50:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:50:04,564 INFO L225 Difference]: With dead ends: 8728 [2021-08-21 11:50:04,564 INFO L226 Difference]: Without dead ends: 8728 [2021-08-21 11:50:04,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2785 GetRequests, 1462 SyntacticMatches, 0 SemanticMatches, 1323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886582 ImplicationChecksByTransitivity, 86785.3ms TimeCoverageRelationStatistics Valid=303321, Invalid=1450979, Unknown=0, NotChecked=0, Total=1754300 [2021-08-21 11:50:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-08-21 11:50:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 7882. [2021-08-21 11:50:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 1.9949245019667554) internal successors, (15722), 7881 states have internal predecessors, (15722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 15722 transitions. [2021-08-21 11:50:04,737 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 15722 transitions. Word has length 205 [2021-08-21 11:50:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:50:04,737 INFO L470 AbstractCegarLoop]: Abstraction has 7882 states and 15722 transitions. [2021-08-21 11:50:04,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.326923076923077) internal successors, (225), 52 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 15722 transitions. [2021-08-21 11:50:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-08-21 11:50:04,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:50:04,748 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 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 11:50:04,767 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 11:50:04,952 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 11:50:04,953 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:50:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:50:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1149518607, now seen corresponding path program 18 times [2021-08-21 11:50:04,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:50:04,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355994027] [2021-08-21 11:50:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:50:04,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:50:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:50:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-21 11:50:05,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:50:05,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355994027] [2021-08-21 11:50:05,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355994027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:05,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695142411] [2021-08-21 11:50:05,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:50:05,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:50:05,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:50:05,393 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 11:50:05,394 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 11:50:06,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 11:50:06,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:50:06,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 11:50:06,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:50:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-08-21 11:50:06,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695142411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:06,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:50:06,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-08-21 11:50:06,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929871617] [2021-08-21 11:50:06,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 11:50:06,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:50:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 11:50:06,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:50:06,863 INFO L87 Difference]: Start difference. First operand 7882 states and 15722 transitions. Second operand has 39 states, 39 states have (on average 4.076923076923077) internal successors, (159), 39 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:50:07,531 INFO L93 Difference]: Finished difference Result 8522 states and 17002 transitions. [2021-08-21 11:50:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:50:07,531 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.076923076923077) internal successors, (159), 39 states have internal predecessors, (159), 0 states have call successors, (0), 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 218 [2021-08-21 11:50:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:50:07,540 INFO L225 Difference]: With dead ends: 8522 [2021-08-21 11:50:07,540 INFO L226 Difference]: Without dead ends: 8522 [2021-08-21 11:50:07,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=1660, Invalid=3596, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 11:50:07,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8522 states. [2021-08-21 11:50:07,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8522 to 8282. [2021-08-21 11:50:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8282 states, 8281 states have (on average 1.9951696654993358) internal successors, (16522), 8281 states have internal predecessors, (16522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8282 states to 8282 states and 16522 transitions. [2021-08-21 11:50:07,622 INFO L78 Accepts]: Start accepts. Automaton has 8282 states and 16522 transitions. Word has length 218 [2021-08-21 11:50:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:50:07,622 INFO L470 AbstractCegarLoop]: Abstraction has 8282 states and 16522 transitions. [2021-08-21 11:50:07,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.076923076923077) internal successors, (159), 39 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 8282 states and 16522 transitions. [2021-08-21 11:50:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-08-21 11:50:07,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:50:07,631 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 11:50:07,650 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 11:50:07,833 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 11:50:07,833 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:50:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:50:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash 64874335, now seen corresponding path program 19 times [2021-08-21 11:50:07,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:50:07,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969219713] [2021-08-21 11:50:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:50:07,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:50:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:50:08,306 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 11:50:08,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:50:08,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969219713] [2021-08-21 11:50:08,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969219713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:08,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622329743] [2021-08-21 11:50:08,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:50:08,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:50:08,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:50:08,308 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 11:50:08,309 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 11:50:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:50:09,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 11:50:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:50:09,786 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 11:50:09,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622329743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:09,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:50:09,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-08-21 11:50:09,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117587347] [2021-08-21 11:50:09,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 11:50:09,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:50:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 11:50:09,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:50:09,787 INFO L87 Difference]: Start difference. First operand 8282 states and 16522 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 11:50:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:50:10,543 INFO L93 Difference]: Finished difference Result 8922 states and 17802 transitions. [2021-08-21 11:50:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 11:50:10,543 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 11:50:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:50:10,553 INFO L225 Difference]: With dead ends: 8922 [2021-08-21 11:50:10,553 INFO L226 Difference]: Without dead ends: 8922 [2021-08-21 11:50:10,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 918.8ms TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 11:50:10,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8922 states. [2021-08-21 11:50:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8922 to 8682. [2021-08-21 11:50:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8682 states, 8681 states have (on average 1.9953922359175211) internal successors, (17322), 8681 states have internal predecessors, (17322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:10,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8682 states to 8682 states and 17322 transitions. [2021-08-21 11:50:10,640 INFO L78 Accepts]: Start accepts. Automaton has 8682 states and 17322 transitions. Word has length 223 [2021-08-21 11:50:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:50:10,640 INFO L470 AbstractCegarLoop]: Abstraction has 8682 states and 17322 transitions. [2021-08-21 11:50:10,640 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 11:50:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 8682 states and 17322 transitions. [2021-08-21 11:50:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-08-21 11:50:10,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:50:10,649 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 11:50:10,668 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 11:50:10,850 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 11:50:10,850 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:50:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:50:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1466856719, now seen corresponding path program 20 times [2021-08-21 11:50:10,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:50:10,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129921521] [2021-08-21 11:50:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:50:10,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:50:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:50:11,387 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 11:50:11,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:50:11,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129921521] [2021-08-21 11:50:11,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129921521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:11,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832828687] [2021-08-21 11:50:11,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:50:11,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:50:11,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:50:11,388 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 11:50:11,390 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 11:50:12,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:50:12,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:50:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 11:50:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:50:12,904 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 11:50:12,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832828687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:12,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:50:12,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-08-21 11:50:12,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704598774] [2021-08-21 11:50:12,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 11:50:12,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:50:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 11:50:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:50:12,905 INFO L87 Difference]: Start difference. First operand 8682 states and 17322 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 11:50:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:50:13,769 INFO L93 Difference]: Finished difference Result 9082 states and 18122 transitions. [2021-08-21 11:50:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 11:50:13,769 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 11:50:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:50:13,779 INFO L225 Difference]: With dead ends: 9082 [2021-08-21 11:50:13,780 INFO L226 Difference]: Without dead ends: 9082 [2021-08-21 11:50:13,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1036.7ms TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 11:50:13,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9082 states. [2021-08-21 11:50:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9082 to 9082. [2021-08-21 11:50:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9082 states, 9081 states have (on average 1.9955951987666556) internal successors, (18122), 9081 states have internal predecessors, (18122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9082 states to 9082 states and 18122 transitions. [2021-08-21 11:50:13,873 INFO L78 Accepts]: Start accepts. Automaton has 9082 states and 18122 transitions. Word has length 228 [2021-08-21 11:50:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:50:13,874 INFO L470 AbstractCegarLoop]: Abstraction has 9082 states and 18122 transitions. [2021-08-21 11:50:13,874 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 11:50:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 9082 states and 18122 transitions. [2021-08-21 11:50:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-08-21 11:50:13,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:50:13,883 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 11:50:13,907 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 11:50:14,084 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 11:50:14,085 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:50:14,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:50:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2055015073, now seen corresponding path program 21 times [2021-08-21 11:50:14,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:50:14,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780141506] [2021-08-21 11:50:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:50:14,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:50:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:50:14,746 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 11:50:14,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:50:14,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780141506] [2021-08-21 11:50:14,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780141506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:14,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605752239] [2021-08-21 11:50:14,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:50:14,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:50:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:50:14,747 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 11:50:14,771 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 11:50:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 11:50:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:50:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 11:50:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:50:16,717 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 11:50:16,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605752239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:16,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:50:16,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 21] total 63 [2021-08-21 11:50:16,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090416314] [2021-08-21 11:50:16,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 11:50:16,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:50:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 11:50:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=3222, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 11:50:16,719 INFO L87 Difference]: Start difference. First operand 9082 states and 18122 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 11:50:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:50:52,292 INFO L93 Difference]: Finished difference Result 134316 states and 268590 transitions. [2021-08-21 11:50:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 879 states. [2021-08-21 11:50:52,292 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 11:50:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:50:52,613 INFO L225 Difference]: With dead ends: 134316 [2021-08-21 11:50:52,614 INFO L226 Difference]: Without dead ends: 134316 [2021-08-21 11:50:52,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1948 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 898 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417630 ImplicationChecksByTransitivity, 29395.2ms TimeCoverageRelationStatistics Valid=162507, Invalid=646593, Unknown=0, NotChecked=0, Total=809100 [2021-08-21 11:50:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134316 states. [2021-08-21 11:50:53,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134316 to 9986. [2021-08-21 11:50:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.9959939909864797) internal successors, (19930), 9985 states have internal predecessors, (19930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:50:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 19930 transitions. [2021-08-21 11:50:53,427 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 19930 transitions. Word has length 233 [2021-08-21 11:50:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:50:53,428 INFO L470 AbstractCegarLoop]: Abstraction has 9986 states and 19930 transitions. [2021-08-21 11:50:53,428 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 11:50:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 19930 transitions. [2021-08-21 11:50:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-08-21 11:50:53,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:50:53,439 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 11:50:53,461 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 11:50:53,648 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 11:50:53,649 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:50:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:50:53,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1713750982, now seen corresponding path program 22 times [2021-08-21 11:50:53,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:50:53,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565291843] [2021-08-21 11:50:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:50:53,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:50:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:50:54,506 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 11:50:54,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:50:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565291843] [2021-08-21 11:50:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565291843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:54,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674748588] [2021-08-21 11:50:54,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:50:54,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:50:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:50:54,508 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 11:50:54,508 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 11:50:55,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:50:55,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:50:55,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 11:50:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:50:56,574 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 11:50:56,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674748588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:50:56,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:50:56,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-08-21 11:50:56,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340922832] [2021-08-21 11:50:56,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 11:50:56,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:50:56,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 11:50:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 11:50:56,576 INFO L87 Difference]: Start difference. First operand 9986 states and 19930 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 11:51:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:51:47,548 INFO L93 Difference]: Finished difference Result 170472 states and 340902 transitions. [2021-08-21 11:51:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1102 states. [2021-08-21 11:51:47,548 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 11:51:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:51:47,878 INFO L225 Difference]: With dead ends: 170472 [2021-08-21 11:51:47,878 INFO L226 Difference]: Without dead ends: 170472 [2021-08-21 11:51:47,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2400 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 1123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673844 ImplicationChecksByTransitivity, 40893.3ms TimeCoverageRelationStatistics Valid=255553, Invalid=1008947, Unknown=0, NotChecked=0, Total=1264500 [2021-08-21 11:51:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170472 states. [2021-08-21 11:51:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170472 to 10890. [2021-08-21 11:51:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10890 states, 10889 states have (on average 1.9963265680962439) internal successors, (21738), 10889 states have internal predecessors, (21738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:51:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10890 states to 10890 states and 21738 transitions. [2021-08-21 11:51:49,032 INFO L78 Accepts]: Start accepts. Automaton has 10890 states and 21738 transitions. Word has length 241 [2021-08-21 11:51:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:51:49,032 INFO L470 AbstractCegarLoop]: Abstraction has 10890 states and 21738 transitions. [2021-08-21 11:51:49,032 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 11:51:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10890 states and 21738 transitions. [2021-08-21 11:51:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-08-21 11:51:49,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:51:49,043 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 11:51:49,063 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 11:51:49,252 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 11:51:49,252 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:51:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:51:49,253 INFO L82 PathProgramCache]: Analyzing trace with hash -199854059, now seen corresponding path program 23 times [2021-08-21 11:51:49,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:51:49,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675091564] [2021-08-21 11:51:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:51:49,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:51:49,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:51:49,986 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 11:51:49,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:51:49,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675091564] [2021-08-21 11:51:49,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675091564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:51:49,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036462956] [2021-08-21 11:51:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:51:49,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:51:49,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:51:49,987 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 11:51:49,991 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 11:51:51,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-21 11:51:51,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:51:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 11:51:51,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:51:52,247 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 11:51:52,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036462956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:51:52,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:51:52,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2021-08-21 11:51:52,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604109530] [2021-08-21 11:51:52,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 11:51:52,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:51:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 11:51:52,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=4148, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 11:51:52,249 INFO L87 Difference]: Start difference. First operand 10890 states and 21738 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 11:53:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:53:05,099 INFO L93 Difference]: Finished difference Result 211585 states and 423128 transitions. [2021-08-21 11:53:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1363 states. [2021-08-21 11:53:05,099 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 11:53:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:53:05,641 INFO L225 Difference]: With dead ends: 211585 [2021-08-21 11:53:05,641 INFO L226 Difference]: Without dead ends: 211585 [2021-08-21 11:53:05,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2928 GetRequests, 1542 SyntacticMatches, 0 SemanticMatches, 1386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053353 ImplicationChecksByTransitivity, 56113.6ms TimeCoverageRelationStatistics Valid=390931, Invalid=1534225, Unknown=0, NotChecked=0, Total=1925156 [2021-08-21 11:53:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211585 states. [2021-08-21 11:53:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211585 to 11794. [2021-08-21 11:53:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11793 states have (on average 1.9966081573814976) internal successors, (23546), 11793 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:53:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 23546 transitions. [2021-08-21 11:53:07,022 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 23546 transitions. Word has length 249 [2021-08-21 11:53:07,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:53:07,022 INFO L470 AbstractCegarLoop]: Abstraction has 11794 states and 23546 transitions. [2021-08-21 11:53:07,022 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 11:53:07,022 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 23546 transitions. [2021-08-21 11:53:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-08-21 11:53:07,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:53:07,034 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 11:53:07,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 11:53:07,244 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 11:53:07,245 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:53:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:53:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash -294475536, now seen corresponding path program 24 times [2021-08-21 11:53:07,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:53:07,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76839355] [2021-08-21 11:53:07,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:53:07,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:53:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:53:08,036 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 11:53:08,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:53:08,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76839355] [2021-08-21 11:53:08,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76839355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:53:08,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889071387] [2021-08-21 11:53:08,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:53:08,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:53:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:53:08,045 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 11:53:08,070 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 11:53:09,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-21 11:53:09,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:53:09,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 11:53:09,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:53:10,633 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 11:53:10,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889071387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:53:10,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:53:10,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-08-21 11:53:10,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428354016] [2021-08-21 11:53:10,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-21 11:53:10,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:53:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-21 11:53:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=4653, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 11:53:10,636 INFO L87 Difference]: Start difference. First operand 11794 states and 23546 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 11:54:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:54:59,747 INFO L93 Difference]: Finished difference Result 257593 states and 515144 transitions. [2021-08-21 11:54:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1665 states. [2021-08-21 11:54:59,748 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 11:54:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:55:00,343 INFO L225 Difference]: With dead ends: 257593 [2021-08-21 11:55:00,343 INFO L226 Difference]: Without dead ends: 257593 [2021-08-21 11:55:00,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3538 GetRequests, 1848 SyntacticMatches, 0 SemanticMatches, 1690 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600440 ImplicationChecksByTransitivity, 79152.8ms TimeCoverageRelationStatistics Valid=583037, Invalid=2278135, Unknown=0, NotChecked=0, Total=2861172 [2021-08-21 11:55:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257593 states. [2021-08-21 11:55:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257593 to 12698. [2021-08-21 11:55:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12698 states, 12697 states have (on average 1.9968496495235095) internal successors, (25354), 12697 states have internal predecessors, (25354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:55:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12698 states to 12698 states and 25354 transitions. [2021-08-21 11:55:02,491 INFO L78 Accepts]: Start accepts. Automaton has 12698 states and 25354 transitions. Word has length 257 [2021-08-21 11:55:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:55:02,491 INFO L470 AbstractCegarLoop]: Abstraction has 12698 states and 25354 transitions. [2021-08-21 11:55:02,491 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 11:55:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12698 states and 25354 transitions. [2021-08-21 11:55:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-08-21 11:55:02,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:55:02,508 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 11:55:02,531 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 11:55:02,709 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 11:55:02,709 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-08-21 11:55:02,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:55:02,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2016005835, now seen corresponding path program 25 times [2021-08-21 11:55:02,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:55:02,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474585000] [2021-08-21 11:55:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:55:02,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:55:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:55:03,651 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 11:55:03,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:55:03,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474585000] [2021-08-21 11:55:03,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474585000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:55:03,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495427282] [2021-08-21 11:55:03,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:55:03,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:55:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:55:03,652 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 11:55:03,652 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 11:55:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:55:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 11:55:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:55:06,252 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 11:55:06,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495427282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:55:06,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:55:06,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 29] total 79 [2021-08-21 11:55:06,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187659151] [2021-08-21 11:55:06,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 11:55:06,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:55:06,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 11:55:06,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=976, Invalid=5186, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 11:55:06,254 INFO L87 Difference]: Start difference. First operand 12698 states and 25354 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)