/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 18:44:43,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 18:44:43,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 18:44:44,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 18:44:44,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 18:44:44,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 18:44:44,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 18:44:44,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 18:44:44,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 18:44:44,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 18:44:44,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 18:44:44,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 18:44:44,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 18:44:44,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 18:44:44,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 18:44:44,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 18:44:44,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 18:44:44,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 18:44:44,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 18:44:44,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 18:44:44,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 18:44:44,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 18:44:44,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 18:44:44,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 18:44:44,050 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 18:44:44,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 18:44:44,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 18:44:44,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 18:44:44,061 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 18:44:44,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 18:44:44,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 18:44:44,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 18:44:44,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 18:44:44,104 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 18:44:44,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 18:44:44,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 18:44:44,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 18:44:44,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 18:44:44,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 18:44:44,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 18:44:44,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 18:44:44,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 18:44:44,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 18:44:44,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 18:44:44,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 18:44:44,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 18:44:44,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 18:44:44,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 18:44:44,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 18:44:44,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 18:44:44,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:44:44,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 18:44:44,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 18:44:44,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 18:44:44,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 18:44:44,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 18:44:44,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 18:44:44,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 18:44:44,108 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 18:44:44,108 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 18:44:44,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 18:44:44,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 18:44:44,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 18:44:44,403 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 18:44:44,403 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 18:44:44,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-08-06 18:44:44,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ee059c8/1e3753f982db4fe5ac9da5a8c9c4a88b/FLAG83021f9e8 [2021-08-06 18:44:44,901 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 18:44:44,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-08-06 18:44:44,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ee059c8/1e3753f982db4fe5ac9da5a8c9c4a88b/FLAG83021f9e8 [2021-08-06 18:44:45,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ee059c8/1e3753f982db4fe5ac9da5a8c9c4a88b [2021-08-06 18:44:45,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 18:44:45,211 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 18:44:45,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 18:44:45,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 18:44:45,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 18:44:45,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d16fcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45, skipping insertion in model container [2021-08-06 18:44:45,219 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 18:44:45,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 18:44:45,614 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-08-06 18:44:45,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:44:45,625 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 18:44:45,668 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i[30952,30965] [2021-08-06 18:44:45,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:44:45,707 INFO L208 MainTranslator]: Completed translation [2021-08-06 18:44:45,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45 WrapperNode [2021-08-06 18:44:45,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 18:44:45,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 18:44:45,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 18:44:45,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 18:44:45,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 18:44:45,763 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 18:44:45,763 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 18:44:45,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 18:44:45,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 18:44:45,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 18:44:45,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 18:44:45,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 18:44:45,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (1/1) ... [2021-08-06 18:44:45,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:44:45,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:45,834 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) [2021-08-06 18:44:45,853 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 [2021-08-06 18:44:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-06 18:44:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-06 18:44:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-06 18:44:45,881 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-06 18:44:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 18:44:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-06 18:44:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 18:44:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 18:44:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 18:44:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-06 18:44:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 18:44:45,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 18:44:45,883 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 18:44:46,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 18:44:46,278 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-06 18:44:46,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:44:46 BoogieIcfgContainer [2021-08-06 18:44:46,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 18:44:46,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 18:44:46,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 18:44:46,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 18:44:46,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 06:44:45" (1/3) ... [2021-08-06 18:44:46,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ec3e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:44:46, skipping insertion in model container [2021-08-06 18:44:46,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:45" (2/3) ... [2021-08-06 18:44:46,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ec3e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:44:46, skipping insertion in model container [2021-08-06 18:44:46,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:44:46" (3/3) ... [2021-08-06 18:44:46,288 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-08-06 18:44:46,294 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 18:44:46,295 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 18:44:46,295 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 18:44:46,295 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 18:44:46,322 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,322 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,322 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,323 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,323 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,323 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,327 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,327 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,328 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,328 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,328 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,329 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,329 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,329 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,329 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,331 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,331 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,332 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,333 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,333 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,334 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,336 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,336 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,339 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,339 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,340 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,340 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,340 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,345 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,345 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,345 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,346 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,346 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:46,347 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-06 18:44:46,384 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 18:44:46,401 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 [2021-08-06 18:44:46,401 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 18:44:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 18:44:46,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:46,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:46,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:46,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-08-06 18:44:46,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:46,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464787462] [2021-08-06 18:44:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:46,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:46,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:46,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:46,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:46,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:46,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:46,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:46,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464787462] [2021-08-06 18:44:46,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464787462] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:46,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:46,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:44:46,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900343728] [2021-08-06 18:44:46,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:44:46,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:44:46,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:44:47,001 INFO L87 Difference]: Start difference. First operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:47,113 INFO L93 Difference]: Finished difference Result 1582 states and 1828 transitions. [2021-08-06 18:44:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 18:44:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 18:44:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:47,131 INFO L225 Difference]: With dead ends: 1582 [2021-08-06 18:44:47,131 INFO L226 Difference]: Without dead ends: 554 [2021-08-06 18:44:47,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-06 18:44:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 315. [2021-08-06 18:44:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 305 states have (on average 1.3114754098360655) internal successors, (400), 314 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 400 transitions. [2021-08-06 18:44:47,181 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 400 transitions. Word has length 32 [2021-08-06 18:44:47,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:47,182 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 400 transitions. [2021-08-06 18:44:47,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,182 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 400 transitions. [2021-08-06 18:44:47,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 18:44:47,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:47,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:47,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 18:44:47,184 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-08-06 18:44:47,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:47,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589730692] [2021-08-06 18:44:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:47,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:47,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:47,298 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:47,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:47,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:47,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:47,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:47,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589730692] [2021-08-06 18:44:47,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589730692] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:47,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:47,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:44:47,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495899479] [2021-08-06 18:44:47,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:44:47,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:47,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:44:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:44:47,347 INFO L87 Difference]: Start difference. First operand 315 states and 400 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:47,410 INFO L93 Difference]: Finished difference Result 497 states and 634 transitions. [2021-08-06 18:44:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 18:44:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 18:44:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:47,413 INFO L225 Difference]: With dead ends: 497 [2021-08-06 18:44:47,413 INFO L226 Difference]: Without dead ends: 339 [2021-08-06 18:44:47,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-06 18:44:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 289. [2021-08-06 18:44:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.3451957295373667) internal successors, (378), 288 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 378 transitions. [2021-08-06 18:44:47,432 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 378 transitions. Word has length 36 [2021-08-06 18:44:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:47,432 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 378 transitions. [2021-08-06 18:44:47,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 378 transitions. [2021-08-06 18:44:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:47,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:47,433 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:47,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 18:44:47,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:47,434 INFO L82 PathProgramCache]: Analyzing trace with hash 10456968, now seen corresponding path program 1 times [2021-08-06 18:44:47,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:47,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389516319] [2021-08-06 18:44:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:47,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:47,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:47,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:47,520 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:47,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:47,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:47,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:47,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389516319] [2021-08-06 18:44:47,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389516319] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:47,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:47,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:44:47,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113669969] [2021-08-06 18:44:47,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:44:47,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:44:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:44:47,582 INFO L87 Difference]: Start difference. First operand 289 states and 378 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:47,696 INFO L93 Difference]: Finished difference Result 760 states and 975 transitions. [2021-08-06 18:44:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:47,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:47,700 INFO L225 Difference]: With dead ends: 760 [2021-08-06 18:44:47,700 INFO L226 Difference]: Without dead ends: 613 [2021-08-06 18:44:47,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:44:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-06 18:44:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 310. [2021-08-06 18:44:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 302 states have (on average 1.3410596026490067) internal successors, (405), 309 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 405 transitions. [2021-08-06 18:44:47,722 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 405 transitions. Word has length 40 [2021-08-06 18:44:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:47,723 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 405 transitions. [2021-08-06 18:44:47,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 405 transitions. [2021-08-06 18:44:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:47,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:47,730 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:47,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 18:44:47,731 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:47,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1198227988, now seen corresponding path program 2 times [2021-08-06 18:44:47,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:47,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523080195] [2021-08-06 18:44:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:47,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:47,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:47,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:47,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:47,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:47,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523080195] [2021-08-06 18:44:47,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523080195] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:47,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:47,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:44:47,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641388388] [2021-08-06 18:44:47,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:44:47,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:44:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:44:47,828 INFO L87 Difference]: Start difference. First operand 310 states and 405 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:47,989 INFO L93 Difference]: Finished difference Result 519 states and 673 transitions. [2021-08-06 18:44:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 18:44:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:47,992 INFO L225 Difference]: With dead ends: 519 [2021-08-06 18:44:47,992 INFO L226 Difference]: Without dead ends: 439 [2021-08-06 18:44:47,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:44:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-06 18:44:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 329. [2021-08-06 18:44:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 321 states have (on average 1.35202492211838) internal successors, (434), 328 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 434 transitions. [2021-08-06 18:44:48,002 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 434 transitions. Word has length 40 [2021-08-06 18:44:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:48,004 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 434 transitions. [2021-08-06 18:44:48,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,004 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 434 transitions. [2021-08-06 18:44:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:48,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:48,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:48,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 18:44:48,005 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:48,006 INFO L82 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 3 times [2021-08-06 18:44:48,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:48,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915182976] [2021-08-06 18:44:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:48,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:48,086 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:48,100 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:48,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:48,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:48,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915182976] [2021-08-06 18:44:48,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915182976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:48,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:48,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:44:48,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650593157] [2021-08-06 18:44:48,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:44:48,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:44:48,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:44:48,151 INFO L87 Difference]: Start difference. First operand 329 states and 434 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:48,277 INFO L93 Difference]: Finished difference Result 1074 states and 1385 transitions. [2021-08-06 18:44:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:48,282 INFO L225 Difference]: With dead ends: 1074 [2021-08-06 18:44:48,282 INFO L226 Difference]: Without dead ends: 915 [2021-08-06 18:44:48,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:44:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-06 18:44:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 326. [2021-08-06 18:44:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.3773584905660377) internal successors, (438), 325 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 438 transitions. [2021-08-06 18:44:48,297 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 438 transitions. Word has length 40 [2021-08-06 18:44:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:48,297 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 438 transitions. [2021-08-06 18:44:48,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 438 transitions. [2021-08-06 18:44:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:48,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:48,298 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:48,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 18:44:48,299 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1960098348, now seen corresponding path program 4 times [2021-08-06 18:44:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:48,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081117882] [2021-08-06 18:44:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:48,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:48,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:48,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:48,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:48,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:48,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:48,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081117882] [2021-08-06 18:44:48,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081117882] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:48,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:48,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:44:48,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302186089] [2021-08-06 18:44:48,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:44:48,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:44:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:44:48,470 INFO L87 Difference]: Start difference. First operand 326 states and 438 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:48,651 INFO L93 Difference]: Finished difference Result 555 states and 717 transitions. [2021-08-06 18:44:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 18:44:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:48,655 INFO L225 Difference]: With dead ends: 555 [2021-08-06 18:44:48,655 INFO L226 Difference]: Without dead ends: 432 [2021-08-06 18:44:48,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:44:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-08-06 18:44:48,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 324. [2021-08-06 18:44:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 316 states have (on average 1.3386075949367089) internal successors, (423), 323 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 423 transitions. [2021-08-06 18:44:48,663 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 423 transitions. Word has length 40 [2021-08-06 18:44:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:48,663 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 423 transitions. [2021-08-06 18:44:48,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 423 transitions. [2021-08-06 18:44:48,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:48,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:48,666 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:48,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 18:44:48,674 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:48,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:48,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1405973461, now seen corresponding path program 1 times [2021-08-06 18:44:48,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:48,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262360953] [2021-08-06 18:44:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:48,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:48,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:48,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:48,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:48,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:48,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262360953] [2021-08-06 18:44:48,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262360953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:48,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907663962] [2021-08-06 18:44:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:48,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:48,850 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) [2021-08-06 18:44:48,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 18:44:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:48,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:44:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:49,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:49,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:49,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:49,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:49,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:49,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:49,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907663962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:49,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:49,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 18:44:49,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536355391] [2021-08-06 18:44:49,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:44:49,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:44:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:49,374 INFO L87 Difference]: Start difference. First operand 324 states and 423 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:49,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:49,485 INFO L93 Difference]: Finished difference Result 596 states and 767 transitions. [2021-08-06 18:44:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:49,488 INFO L225 Difference]: With dead ends: 596 [2021-08-06 18:44:49,488 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 18:44:49,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:44:49,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 18:44:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 343. [2021-08-06 18:44:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 335 states have (on average 1.346268656716418) internal successors, (451), 342 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 451 transitions. [2021-08-06 18:44:49,498 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 451 transitions. Word has length 45 [2021-08-06 18:44:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:49,498 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 451 transitions. [2021-08-06 18:44:49,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 451 transitions. [2021-08-06 18:44:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:49,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:49,499 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:49,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:49,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:49,722 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1975051127, now seen corresponding path program 2 times [2021-08-06 18:44:49,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:49,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871647212] [2021-08-06 18:44:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:49,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:49,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:49,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:49,810 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:49,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:49,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:49,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:49,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:49,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871647212] [2021-08-06 18:44:49,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871647212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:49,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795012140] [2021-08-06 18:44:49,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:49,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:49,861 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) [2021-08-06 18:44:49,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 18:44:49,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:44:49,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:44:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:50,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:50,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:50,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:50,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:50,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:50,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795012140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:50,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:50,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 18:44:50,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314064734] [2021-08-06 18:44:50,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:44:50,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:44:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:50,271 INFO L87 Difference]: Start difference. First operand 343 states and 451 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:50,437 INFO L93 Difference]: Finished difference Result 1180 states and 1517 transitions. [2021-08-06 18:44:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:44:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:50,441 INFO L225 Difference]: With dead ends: 1180 [2021-08-06 18:44:50,441 INFO L226 Difference]: Without dead ends: 1018 [2021-08-06 18:44:50,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:44:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-08-06 18:44:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 375. [2021-08-06 18:44:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 367 states have (on average 1.3841961852861036) internal successors, (508), 374 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 508 transitions. [2021-08-06 18:44:50,453 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 508 transitions. Word has length 45 [2021-08-06 18:44:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:50,453 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 508 transitions. [2021-08-06 18:44:50,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 508 transitions. [2021-08-06 18:44:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:50,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:50,454 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:50,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:50,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-06 18:44:50,667 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:50,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1931938267, now seen corresponding path program 3 times [2021-08-06 18:44:50,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:50,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762717222] [2021-08-06 18:44:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:50,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:50,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:50,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:50,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:50,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:50,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:50,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:50,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:50,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762717222] [2021-08-06 18:44:50,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762717222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:50,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368277035] [2021-08-06 18:44:50,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:44:50,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:50,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:50,773 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) [2021-08-06 18:44:50,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 18:44:50,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:44:50,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:44:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:51,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:51,198 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:51,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:51,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:51,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:51,241 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368277035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:51,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:51,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 18:44:51,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414538306] [2021-08-06 18:44:51,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:51,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:51,248 INFO L87 Difference]: Start difference. First operand 375 states and 508 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:51,504 INFO L93 Difference]: Finished difference Result 841 states and 1090 transitions. [2021-08-06 18:44:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:44:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:51,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:51,507 INFO L225 Difference]: With dead ends: 841 [2021-08-06 18:44:51,507 INFO L226 Difference]: Without dead ends: 638 [2021-08-06 18:44:51,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:44:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-08-06 18:44:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 388. [2021-08-06 18:44:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 380 states have (on average 1.3526315789473684) internal successors, (514), 387 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 514 transitions. [2021-08-06 18:44:51,516 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 514 transitions. Word has length 45 [2021-08-06 18:44:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:51,516 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 514 transitions. [2021-08-06 18:44:51,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 514 transitions. [2021-08-06 18:44:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 18:44:51,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:51,517 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:51,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:51,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:51,733 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:51,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:51,733 INFO L82 PathProgramCache]: Analyzing trace with hash -968639933, now seen corresponding path program 1 times [2021-08-06 18:44:51,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:51,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627912041] [2021-08-06 18:44:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:51,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:51,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:51,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:51,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:51,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:51,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:51,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:51,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:51,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627912041] [2021-08-06 18:44:51,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627912041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:51,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966331671] [2021-08-06 18:44:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:51,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:51,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:51,861 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) [2021-08-06 18:44:51,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 18:44:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:52,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:52,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:52,268 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:52,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:52,458 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:52,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:52,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:52,471 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:52,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966331671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:52,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:52,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 18:44:52,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095383071] [2021-08-06 18:44:52,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:44:52,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:44:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:44:52,478 INFO L87 Difference]: Start difference. First operand 388 states and 514 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:52,654 INFO L93 Difference]: Finished difference Result 962 states and 1231 transitions. [2021-08-06 18:44:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:44:52,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 18:44:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:52,657 INFO L225 Difference]: With dead ends: 962 [2021-08-06 18:44:52,657 INFO L226 Difference]: Without dead ends: 772 [2021-08-06 18:44:52,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:44:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-08-06 18:44:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 433. [2021-08-06 18:44:52,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 425 states have (on average 1.3623529411764705) internal successors, (579), 432 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 579 transitions. [2021-08-06 18:44:52,667 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 579 transitions. Word has length 50 [2021-08-06 18:44:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:52,667 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 579 transitions. [2021-08-06 18:44:52,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 579 transitions. [2021-08-06 18:44:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 18:44:52,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:52,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:52,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:52,885 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -150796887, now seen corresponding path program 2 times [2021-08-06 18:44:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:52,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15238] [2021-08-06 18:44:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:52,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:52,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:52,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:52,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:52,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:52,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:52,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:53,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:53,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15238] [2021-08-06 18:44:53,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:53,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656349235] [2021-08-06 18:44:53,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:53,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:53,025 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) [2021-08-06 18:44:53,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 18:44:53,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:44:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:53,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:44:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:53,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:53,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:53,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:53,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:53,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:53,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:53,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656349235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:53,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:53,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-06 18:44:53,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522117295] [2021-08-06 18:44:53,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:44:53,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:44:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:53,553 INFO L87 Difference]: Start difference. First operand 433 states and 579 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:53,676 INFO L93 Difference]: Finished difference Result 919 states and 1177 transitions. [2021-08-06 18:44:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:44:53,676 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 18:44:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:53,679 INFO L225 Difference]: With dead ends: 919 [2021-08-06 18:44:53,679 INFO L226 Difference]: Without dead ends: 769 [2021-08-06 18:44:53,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:44:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-06 18:44:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-08-06 18:44:53,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 420 states have (on average 1.3666666666666667) internal successors, (574), 427 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 574 transitions. [2021-08-06 18:44:53,688 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 574 transitions. Word has length 50 [2021-08-06 18:44:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:53,689 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 574 transitions. [2021-08-06 18:44:53,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 574 transitions. [2021-08-06 18:44:53,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 18:44:53,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:53,690 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:53,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:53,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 18:44:53,904 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:53,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash -725629027, now seen corresponding path program 3 times [2021-08-06 18:44:53,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:53,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938347345] [2021-08-06 18:44:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:53,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:53,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:53,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:53,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:53,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:53,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:53,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:53,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:53,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938347345] [2021-08-06 18:44:53,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938347345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:53,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111099346] [2021-08-06 18:44:53,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:44:53,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:53,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:53,997 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) [2021-08-06 18:44:53,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 18:44:54,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:44:54,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:54,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:54,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:54,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:54,435 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:54,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:54,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:54,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:54,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:54,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111099346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:54,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:54,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-06 18:44:54,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444471544] [2021-08-06 18:44:54,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:44:54,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:44:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:54,531 INFO L87 Difference]: Start difference. First operand 428 states and 574 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:54,691 INFO L93 Difference]: Finished difference Result 1381 states and 1761 transitions. [2021-08-06 18:44:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:44:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 18:44:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:54,699 INFO L225 Difference]: With dead ends: 1381 [2021-08-06 18:44:54,699 INFO L226 Difference]: Without dead ends: 1219 [2021-08-06 18:44:54,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:44:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-08-06 18:44:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 436. [2021-08-06 18:44:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 428 states have (on average 1.3831775700934579) internal successors, (592), 435 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 592 transitions. [2021-08-06 18:44:54,712 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 592 transitions. Word has length 50 [2021-08-06 18:44:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:54,713 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 592 transitions. [2021-08-06 18:44:54,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 592 transitions. [2021-08-06 18:44:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-06 18:44:54,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:54,714 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:54,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:54,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:54,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash -682516167, now seen corresponding path program 4 times [2021-08-06 18:44:54,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:54,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410577812] [2021-08-06 18:44:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:54,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:55,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:55,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:55,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:55,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:55,029 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:55,030 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:55,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:55,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410577812] [2021-08-06 18:44:55,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410577812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:55,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969617409] [2021-08-06 18:44:55,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:44:55,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:55,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:55,056 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) [2021-08-06 18:44:55,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 18:44:55,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:44:55,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:44:55,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:55,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:55,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:55,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:55,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:55,667 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:55,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:55,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969617409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:55,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:55,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 18:44:55,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144483502] [2021-08-06 18:44:55,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:55,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:55,676 INFO L87 Difference]: Start difference. First operand 436 states and 592 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:55,941 INFO L93 Difference]: Finished difference Result 832 states and 1061 transitions. [2021-08-06 18:44:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:44:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-06 18:44:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:55,944 INFO L225 Difference]: With dead ends: 832 [2021-08-06 18:44:55,944 INFO L226 Difference]: Without dead ends: 709 [2021-08-06 18:44:55,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:44:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-08-06 18:44:55,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 427. [2021-08-06 18:44:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 419 states have (on average 1.3651551312649164) internal successors, (572), 426 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 572 transitions. [2021-08-06 18:44:55,954 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 572 transitions. Word has length 50 [2021-08-06 18:44:55,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:55,954 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 572 transitions. [2021-08-06 18:44:55,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 572 transitions. [2021-08-06 18:44:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:55,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:55,955 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:55,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:56,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:56,169 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1367396072, now seen corresponding path program 5 times [2021-08-06 18:44:56,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:56,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372473720] [2021-08-06 18:44:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:56,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:56,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:56,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:56,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:56,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:56,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:56,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:56,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:56,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372473720] [2021-08-06 18:44:56,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372473720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:56,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23445291] [2021-08-06 18:44:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:44:56,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:56,293 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) [2021-08-06 18:44:56,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 18:44:56,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:44:56,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:56,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:56,751 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:56,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:56,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:56,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:56,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:56,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23445291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:56,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:56,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-06 18:44:56,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291309447] [2021-08-06 18:44:56,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:56,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:56,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:56,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:56,943 INFO L87 Difference]: Start difference. First operand 427 states and 572 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:57,095 INFO L93 Difference]: Finished difference Result 893 states and 1141 transitions. [2021-08-06 18:44:57,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:44:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:57,098 INFO L225 Difference]: With dead ends: 893 [2021-08-06 18:44:57,098 INFO L226 Difference]: Without dead ends: 743 [2021-08-06 18:44:57,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:44:57,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-08-06 18:44:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 432. [2021-08-06 18:44:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 424 states have (on average 1.365566037735849) internal successors, (579), 431 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 579 transitions. [2021-08-06 18:44:57,107 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 579 transitions. Word has length 55 [2021-08-06 18:44:57,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:57,107 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 579 transitions. [2021-08-06 18:44:57,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 579 transitions. [2021-08-06 18:44:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:57,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:57,108 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:57,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:57,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 18:44:57,321 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1088516634, now seen corresponding path program 6 times [2021-08-06 18:44:57,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:57,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228510837] [2021-08-06 18:44:57,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:57,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:57,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:57,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:57,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:57,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:57,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:57,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:57,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:57,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228510837] [2021-08-06 18:44:57,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228510837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:57,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529800073] [2021-08-06 18:44:57,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:44:57,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:57,425 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) [2021-08-06 18:44:57,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 18:44:57,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:44:57,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:57,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:57,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:57,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:57,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:57,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:57,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:58,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:58,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:58,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529800073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:58,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:58,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-06 18:44:58,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48280082] [2021-08-06 18:44:58,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:58,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:58,009 INFO L87 Difference]: Start difference. First operand 432 states and 579 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:58,191 INFO L93 Difference]: Finished difference Result 1415 states and 1811 transitions. [2021-08-06 18:44:58,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:44:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:58,195 INFO L225 Difference]: With dead ends: 1415 [2021-08-06 18:44:58,195 INFO L226 Difference]: Without dead ends: 1253 [2021-08-06 18:44:58,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:44:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-08-06 18:44:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 465. [2021-08-06 18:44:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 457 states have (on average 1.3829321663019694) internal successors, (632), 464 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 632 transitions. [2021-08-06 18:44:58,207 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 632 transitions. Word has length 55 [2021-08-06 18:44:58,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:58,208 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 632 transitions. [2021-08-06 18:44:58,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 632 transitions. [2021-08-06 18:44:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:58,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:58,209 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:58,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:58,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 18:44:58,433 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1131629494, now seen corresponding path program 7 times [2021-08-06 18:44:58,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:58,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345823946] [2021-08-06 18:44:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:58,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:58,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:58,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:58,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:58,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:58,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:58,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:58,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:58,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345823946] [2021-08-06 18:44:58,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345823946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:58,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887477802] [2021-08-06 18:44:58,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:44:58,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:58,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:58,560 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) [2021-08-06 18:44:58,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 18:44:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:58,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:59,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:59,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:59,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:59,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:59,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:59,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:59,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887477802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:59,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:59,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 18:44:59,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134869683] [2021-08-06 18:44:59,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:44:59,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:44:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:44:59,170 INFO L87 Difference]: Start difference. First operand 465 states and 632 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:59,489 INFO L93 Difference]: Finished difference Result 1101 states and 1410 transitions. [2021-08-06 18:44:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:44:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:59,493 INFO L225 Difference]: With dead ends: 1101 [2021-08-06 18:44:59,493 INFO L226 Difference]: Without dead ends: 898 [2021-08-06 18:44:59,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:44:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-08-06 18:44:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 478. [2021-08-06 18:44:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 470 states have (on average 1.3574468085106384) internal successors, (638), 477 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 638 transitions. [2021-08-06 18:44:59,505 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 638 transitions. Word has length 55 [2021-08-06 18:44:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:59,505 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 638 transitions. [2021-08-06 18:44:59,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:59,505 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 638 transitions. [2021-08-06 18:44:59,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-06 18:44:59,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:59,506 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:59,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:59,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 18:44:59,721 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1891275182, now seen corresponding path program 8 times [2021-08-06 18:44:59,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:59,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776311663] [2021-08-06 18:44:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:59,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:59,778 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:59,779 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:59,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:59,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:59,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:59,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:59,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:59,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776311663] [2021-08-06 18:44:59,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776311663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:59,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581005559] [2021-08-06 18:44:59,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:59,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:59,884 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) [2021-08-06 18:44:59,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 18:45:00,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:00,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:00,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:00,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:00,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:00,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:00,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:00,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:00,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:00,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:00,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581005559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:00,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:00,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-06 18:45:00,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682142250] [2021-08-06 18:45:00,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:00,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:00,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:00,821 INFO L87 Difference]: Start difference. First operand 478 states and 638 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:01,008 INFO L93 Difference]: Finished difference Result 1102 states and 1415 transitions. [2021-08-06 18:45:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:45:01,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-06 18:45:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:01,010 INFO L225 Difference]: With dead ends: 1102 [2021-08-06 18:45:01,010 INFO L226 Difference]: Without dead ends: 912 [2021-08-06 18:45:01,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:45:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-06 18:45:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 523. [2021-08-06 18:45:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 515 states have (on average 1.3650485436893205) internal successors, (703), 522 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 703 transitions. [2021-08-06 18:45:01,020 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 703 transitions. Word has length 60 [2021-08-06 18:45:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:01,021 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 703 transitions. [2021-08-06 18:45:01,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 703 transitions. [2021-08-06 18:45:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-06 18:45:01,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:01,022 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:01,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 18:45:01,237 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1891775032, now seen corresponding path program 9 times [2021-08-06 18:45:01,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:01,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862564059] [2021-08-06 18:45:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:01,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:01,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:01,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:01,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:01,278 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:01,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:01,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:01,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:01,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862564059] [2021-08-06 18:45:01,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862564059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:01,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134184789] [2021-08-06 18:45:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:01,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:01,356 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) [2021-08-06 18:45:01,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 18:45:01,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:45:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:45:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:01,853 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:01,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:02,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:02,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:02,088 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:02,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134184789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:02,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:02,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 18:45:02,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626030100] [2021-08-06 18:45:02,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:02,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:02,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:02,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:02,094 INFO L87 Difference]: Start difference. First operand 523 states and 703 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:02,262 INFO L93 Difference]: Finished difference Result 1159 states and 1481 transitions. [2021-08-06 18:45:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:45:02,262 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-06 18:45:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:02,265 INFO L225 Difference]: With dead ends: 1159 [2021-08-06 18:45:02,265 INFO L226 Difference]: Without dead ends: 1009 [2021-08-06 18:45:02,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:45:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-06 18:45:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 518. [2021-08-06 18:45:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 510 states have (on average 1.3686274509803922) internal successors, (698), 517 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 698 transitions. [2021-08-06 18:45:02,276 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 698 transitions. Word has length 60 [2021-08-06 18:45:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:02,276 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 698 transitions. [2021-08-06 18:45:02,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 698 transitions. [2021-08-06 18:45:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-06 18:45:02,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:02,277 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:02,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:02,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 18:45:02,493 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1472457940, now seen corresponding path program 10 times [2021-08-06 18:45:02,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:02,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050221689] [2021-08-06 18:45:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:02,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:02,539 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:02,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:02,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:02,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:02,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:02,587 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:02,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050221689] [2021-08-06 18:45:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050221689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:02,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833969396] [2021-08-06 18:45:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:02,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:02,614 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) [2021-08-06 18:45:02,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 18:45:03,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:03,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:45:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:03,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:03,276 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:03,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:03,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:03,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:03,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:03,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833969396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:03,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:03,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 18:45:03,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25747657] [2021-08-06 18:45:03,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:03,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:03,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:03,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:03,444 INFO L87 Difference]: Start difference. First operand 518 states and 698 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:03,608 INFO L93 Difference]: Finished difference Result 1124 states and 1426 transitions. [2021-08-06 18:45:03,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:45:03,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-06 18:45:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:03,610 INFO L225 Difference]: With dead ends: 1124 [2021-08-06 18:45:03,610 INFO L226 Difference]: Without dead ends: 974 [2021-08-06 18:45:03,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:45:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-08-06 18:45:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 518. [2021-08-06 18:45:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 510 states have (on average 1.3686274509803922) internal successors, (698), 517 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 698 transitions. [2021-08-06 18:45:03,620 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 698 transitions. Word has length 60 [2021-08-06 18:45:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:03,620 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 698 transitions. [2021-08-06 18:45:03,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 698 transitions. [2021-08-06 18:45:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-06 18:45:03,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:03,621 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:03,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:03,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:03,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash 983454766, now seen corresponding path program 11 times [2021-08-06 18:45:03,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:03,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141470274] [2021-08-06 18:45:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:03,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:03,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:03,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:03,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:03,904 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:03,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:03,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:03,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:03,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141470274] [2021-08-06 18:45:03,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141470274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:03,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75173821] [2021-08-06 18:45:03,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:03,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:03,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:03,942 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) [2021-08-06 18:45:03,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 18:45:04,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:45:04,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:04,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:45:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:04,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:04,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:04,751 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:04,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:04,760 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:04,761 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:04,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75173821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:04,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:04,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 18:45:04,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493806521] [2021-08-06 18:45:04,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:04,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:04,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:04,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:04,766 INFO L87 Difference]: Start difference. First operand 518 states and 698 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:04,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:04,967 INFO L93 Difference]: Finished difference Result 1581 states and 2005 transitions. [2021-08-06 18:45:04,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:45:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-06 18:45:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:04,971 INFO L225 Difference]: With dead ends: 1581 [2021-08-06 18:45:04,971 INFO L226 Difference]: Without dead ends: 1419 [2021-08-06 18:45:04,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:45:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-08-06 18:45:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 526. [2021-08-06 18:45:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 518 states have (on average 1.3822393822393821) internal successors, (716), 525 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 716 transitions. [2021-08-06 18:45:04,983 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 716 transitions. Word has length 60 [2021-08-06 18:45:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:04,983 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 716 transitions. [2021-08-06 18:45:04,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 716 transitions. [2021-08-06 18:45:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-06 18:45:04,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:04,984 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:05,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 18:45:05,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:05,201 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1026567626, now seen corresponding path program 12 times [2021-08-06 18:45:05,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:05,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534907993] [2021-08-06 18:45:05,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:05,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:05,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:05,255 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:05,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:05,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:05,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:05,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:05,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:05,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534907993] [2021-08-06 18:45:05,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534907993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:05,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150429439] [2021-08-06 18:45:05,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:05,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:05,305 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) [2021-08-06 18:45:05,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 18:45:05,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:45:05,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:06,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:06,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:06,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:06,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:06,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:06,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:06,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150429439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:06,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:06,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-06 18:45:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558405592] [2021-08-06 18:45:06,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:06,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:06,150 INFO L87 Difference]: Start difference. First operand 526 states and 716 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:06,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:06,469 INFO L93 Difference]: Finished difference Result 1208 states and 1545 transitions. [2021-08-06 18:45:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:06,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-06 18:45:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:06,472 INFO L225 Difference]: With dead ends: 1208 [2021-08-06 18:45:06,473 INFO L226 Difference]: Without dead ends: 1005 [2021-08-06 18:45:06,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:45:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-08-06 18:45:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 483. [2021-08-06 18:45:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 475 states have (on average 1.36) internal successors, (646), 482 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 646 transitions. [2021-08-06 18:45:06,486 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 646 transitions. Word has length 60 [2021-08-06 18:45:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:06,487 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 646 transitions. [2021-08-06 18:45:06,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 646 transitions. [2021-08-06 18:45:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:06,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:06,488 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:06,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:06,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:06,701 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:06,701 INFO L82 PathProgramCache]: Analyzing trace with hash -160555289, now seen corresponding path program 13 times [2021-08-06 18:45:06,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:06,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906678012] [2021-08-06 18:45:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:06,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:06,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:06,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:06,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:06,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:06,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:06,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:06,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906678012] [2021-08-06 18:45:06,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906678012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:06,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122857848] [2021-08-06 18:45:06,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:06,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:06,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:06,885 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) [2021-08-06 18:45:06,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 18:45:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:07,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:07,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:07,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:07,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:07,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:07,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:07,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:07,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122857848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:07,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:07,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:07,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749101566] [2021-08-06 18:45:07,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:07,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:07,844 INFO L87 Difference]: Start difference. First operand 483 states and 646 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:08,017 INFO L93 Difference]: Finished difference Result 1049 states and 1335 transitions. [2021-08-06 18:45:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:45:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:08,021 INFO L225 Difference]: With dead ends: 1049 [2021-08-06 18:45:08,021 INFO L226 Difference]: Without dead ends: 899 [2021-08-06 18:45:08,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:45:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-08-06 18:45:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 488. [2021-08-06 18:45:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 480 states have (on average 1.3604166666666666) internal successors, (653), 487 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 653 transitions. [2021-08-06 18:45:08,030 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 653 transitions. Word has length 65 [2021-08-06 18:45:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:08,030 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 653 transitions. [2021-08-06 18:45:08,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 653 transitions. [2021-08-06 18:45:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:08,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:08,031 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:08,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:08,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 18:45:08,249 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1317239447, now seen corresponding path program 14 times [2021-08-06 18:45:08,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:08,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556727436] [2021-08-06 18:45:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:08,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:08,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:08,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:08,310 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:08,311 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:08,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:08,345 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:08,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:08,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556727436] [2021-08-06 18:45:08,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556727436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:08,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887311279] [2021-08-06 18:45:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:08,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:08,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:08,377 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) [2021-08-06 18:45:08,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 18:45:08,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:08,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:08,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:09,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:09,119 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:09,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:09,276 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:09,286 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:09,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:09,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887311279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:09,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:09,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:09,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448749805] [2021-08-06 18:45:09,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:09,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:09,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:09,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:09,293 INFO L87 Difference]: Start difference. First operand 488 states and 653 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:09,527 INFO L93 Difference]: Finished difference Result 1174 states and 1487 transitions. [2021-08-06 18:45:09,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:45:09,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:09,530 INFO L225 Difference]: With dead ends: 1174 [2021-08-06 18:45:09,531 INFO L226 Difference]: Without dead ends: 1024 [2021-08-06 18:45:09,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:45:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-08-06 18:45:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 518. [2021-08-06 18:45:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 510 states have (on average 1.3627450980392157) internal successors, (695), 517 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 695 transitions. [2021-08-06 18:45:09,541 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 695 transitions. Word has length 65 [2021-08-06 18:45:09,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:09,541 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 695 transitions. [2021-08-06 18:45:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 695 transitions. [2021-08-06 18:45:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:09,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:09,543 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:09,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:09,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:09,769 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673259, now seen corresponding path program 15 times [2021-08-06 18:45:09,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:09,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431605897] [2021-08-06 18:45:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:09,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:09,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:09,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:09,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:09,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:09,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:09,862 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:09,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:09,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431605897] [2021-08-06 18:45:09,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431605897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:09,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112855630] [2021-08-06 18:45:09,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:09,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:09,897 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) [2021-08-06 18:45:09,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 18:45:10,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:45:10,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:10,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:10,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:10,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:10,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:10,822 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:10,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:10,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112855630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:10,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:10,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:10,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136011472] [2021-08-06 18:45:10,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:10,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:10,828 INFO L87 Difference]: Start difference. First operand 518 states and 695 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:11,092 INFO L93 Difference]: Finished difference Result 1660 states and 2122 transitions. [2021-08-06 18:45:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:45:11,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:11,095 INFO L225 Difference]: With dead ends: 1660 [2021-08-06 18:45:11,095 INFO L226 Difference]: Without dead ends: 1455 [2021-08-06 18:45:11,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:45:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-06 18:45:11,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 551. [2021-08-06 18:45:11,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 543 states have (on average 1.3775322283609577) internal successors, (748), 550 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 748 transitions. [2021-08-06 18:45:11,123 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 748 transitions. Word has length 65 [2021-08-06 18:45:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:11,123 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 748 transitions. [2021-08-06 18:45:11,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 748 transitions. [2021-08-06 18:45:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:11,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:11,126 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:11,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:11,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:11,333 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1181786119, now seen corresponding path program 16 times [2021-08-06 18:45:11,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:11,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904185999] [2021-08-06 18:45:11,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:11,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:11,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:11,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:11,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:11,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:11,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:11,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:11,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:11,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904185999] [2021-08-06 18:45:11,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904185999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:11,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357325161] [2021-08-06 18:45:11,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:11,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:11,441 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) [2021-08-06 18:45:11,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 18:45:11,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:12,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:12,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:12,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:12,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:12,322 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:12,323 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:12,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357325161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:12,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:12,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:12,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464229444] [2021-08-06 18:45:12,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:12,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:12,329 INFO L87 Difference]: Start difference. First operand 551 states and 748 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:12,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:12,638 INFO L93 Difference]: Finished difference Result 1077 states and 1357 transitions. [2021-08-06 18:45:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:12,641 INFO L225 Difference]: With dead ends: 1077 [2021-08-06 18:45:12,641 INFO L226 Difference]: Without dead ends: 954 [2021-08-06 18:45:12,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:45:12,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-06 18:45:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 568. [2021-08-06 18:45:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 560 states have (on average 1.3607142857142858) internal successors, (762), 567 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 762 transitions. [2021-08-06 18:45:12,652 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 762 transitions. Word has length 65 [2021-08-06 18:45:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:12,652 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 762 transitions. [2021-08-06 18:45:12,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 762 transitions. [2021-08-06 18:45:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 18:45:12,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:12,653 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:12,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:12,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:12,868 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:12,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1377606561, now seen corresponding path program 17 times [2021-08-06 18:45:12,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:12,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095512351] [2021-08-06 18:45:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:12,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:12,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:12,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:12,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:12,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:13,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:13,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:13,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:13,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095512351] [2021-08-06 18:45:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095512351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:13,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048553442] [2021-08-06 18:45:13,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:13,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:13,033 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) [2021-08-06 18:45:13,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 18:45:13,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:45:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:13,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:13,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:14,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:14,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:14,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:14,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:14,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048553442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:14,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:14,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-08-06 18:45:14,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033008111] [2021-08-06 18:45:14,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:45:14,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:45:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:45:14,207 INFO L87 Difference]: Start difference. First operand 568 states and 762 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:14,428 INFO L93 Difference]: Finished difference Result 1242 states and 1599 transitions. [2021-08-06 18:45:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:45:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 18:45:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:14,430 INFO L225 Difference]: With dead ends: 1242 [2021-08-06 18:45:14,430 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 18:45:14,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:45:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 18:45:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 613. [2021-08-06 18:45:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 605 states have (on average 1.3669421487603306) internal successors, (827), 612 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 827 transitions. [2021-08-06 18:45:14,440 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 827 transitions. Word has length 70 [2021-08-06 18:45:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:14,440 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 827 transitions. [2021-08-06 18:45:14,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 827 transitions. [2021-08-06 18:45:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 18:45:14,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:14,442 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:14,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:14,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 18:45:14,667 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2110113785, now seen corresponding path program 18 times [2021-08-06 18:45:14,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:14,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877257550] [2021-08-06 18:45:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:14,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:14,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:14,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:14,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:14,706 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:14,787 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:14,788 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:14,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:14,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877257550] [2021-08-06 18:45:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877257550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:14,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122195808] [2021-08-06 18:45:14,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:14,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:14,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:14,822 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) [2021-08-06 18:45:14,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 18:45:15,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:45:15,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:15,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:15,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:15,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:15,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:16,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:16,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:16,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:16,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:16,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122195808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:16,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:16,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 18:45:16,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635170035] [2021-08-06 18:45:16,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:16,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:16,086 INFO L87 Difference]: Start difference. First operand 613 states and 827 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:16,279 INFO L93 Difference]: Finished difference Result 1399 states and 1785 transitions. [2021-08-06 18:45:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:45:16,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 18:45:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:16,286 INFO L225 Difference]: With dead ends: 1399 [2021-08-06 18:45:16,286 INFO L226 Difference]: Without dead ends: 1249 [2021-08-06 18:45:16,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:45:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-08-06 18:45:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 608. [2021-08-06 18:45:16,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 600 states have (on average 1.37) internal successors, (822), 607 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 822 transitions. [2021-08-06 18:45:16,295 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 822 transitions. Word has length 70 [2021-08-06 18:45:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:16,295 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 822 transitions. [2021-08-06 18:45:16,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 822 transitions. [2021-08-06 18:45:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 18:45:16,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:16,297 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:16,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:16,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 18:45:16,503 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:16,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2094430203, now seen corresponding path program 19 times [2021-08-06 18:45:16,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:16,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618913119] [2021-08-06 18:45:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:16,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:16,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:16,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:16,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:16,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:16,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:16,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:16,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:16,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618913119] [2021-08-06 18:45:16,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618913119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:16,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387960969] [2021-08-06 18:45:16,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:16,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:16,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:16,645 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) [2021-08-06 18:45:16,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 18:45:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:17,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:17,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:17,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:17,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:17,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:17,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:17,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:17,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387960969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:17,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:17,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 18:45:17,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821230147] [2021-08-06 18:45:17,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:17,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:17,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:17,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:17,902 INFO L87 Difference]: Start difference. First operand 608 states and 822 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:18,118 INFO L93 Difference]: Finished difference Result 1364 states and 1730 transitions. [2021-08-06 18:45:18,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:45:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 18:45:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:18,121 INFO L225 Difference]: With dead ends: 1364 [2021-08-06 18:45:18,121 INFO L226 Difference]: Without dead ends: 1214 [2021-08-06 18:45:18,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:45:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-08-06 18:45:18,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 608. [2021-08-06 18:45:18,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 600 states have (on average 1.37) internal successors, (822), 607 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 822 transitions. [2021-08-06 18:45:18,130 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 822 transitions. Word has length 70 [2021-08-06 18:45:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:18,130 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 822 transitions. [2021-08-06 18:45:18,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 822 transitions. [2021-08-06 18:45:18,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 18:45:18,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:18,131 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:18,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:18,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 18:45:18,332 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:18,332 INFO L82 PathProgramCache]: Analyzing trace with hash 937746045, now seen corresponding path program 20 times [2021-08-06 18:45:18,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:18,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984052858] [2021-08-06 18:45:18,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:18,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:18,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:18,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:18,400 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:18,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:18,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:18,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:18,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:18,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984052858] [2021-08-06 18:45:18,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984052858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:18,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91651550] [2021-08-06 18:45:18,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:18,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:18,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:18,467 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) [2021-08-06 18:45:18,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 18:45:19,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:19,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:19,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:19,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:19,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:19,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:19,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:19,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:19,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91651550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:19,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:19,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 18:45:19,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024390882] [2021-08-06 18:45:19,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:19,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:19,675 INFO L87 Difference]: Start difference. First operand 608 states and 822 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:19,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:19,942 INFO L93 Difference]: Finished difference Result 1324 states and 1670 transitions. [2021-08-06 18:45:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:45:19,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 18:45:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:19,946 INFO L225 Difference]: With dead ends: 1324 [2021-08-06 18:45:19,946 INFO L226 Difference]: Without dead ends: 1174 [2021-08-06 18:45:19,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:45:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-08-06 18:45:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 608. [2021-08-06 18:45:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 600 states have (on average 1.37) internal successors, (822), 607 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 822 transitions. [2021-08-06 18:45:19,957 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 822 transitions. Word has length 70 [2021-08-06 18:45:19,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:19,957 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 822 transitions. [2021-08-06 18:45:19,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 822 transitions. [2021-08-06 18:45:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 18:45:19,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:19,959 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:19,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:20,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:20,173 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash -901308545, now seen corresponding path program 21 times [2021-08-06 18:45:20,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:20,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653371856] [2021-08-06 18:45:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:20,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:20,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:20,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:20,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:20,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:20,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:20,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:20,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:20,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653371856] [2021-08-06 18:45:20,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653371856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:20,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692676595] [2021-08-06 18:45:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:20,293 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:20,301 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) [2021-08-06 18:45:20,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 18:45:21,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:45:21,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:21,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:21,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:21,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:21,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:21,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:21,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692676595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:21,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 18:45:21,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845289341] [2021-08-06 18:45:21,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:21,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:21,507 INFO L87 Difference]: Start difference. First operand 608 states and 822 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:21,855 INFO L93 Difference]: Finished difference Result 1834 states and 2332 transitions. [2021-08-06 18:45:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:45:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 18:45:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:21,859 INFO L225 Difference]: With dead ends: 1834 [2021-08-06 18:45:21,860 INFO L226 Difference]: Without dead ends: 1629 [2021-08-06 18:45:21,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:45:21,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-08-06 18:45:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 620. [2021-08-06 18:45:21,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 612 states have (on average 1.3856209150326797) internal successors, (848), 619 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 848 transitions. [2021-08-06 18:45:21,873 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 848 transitions. Word has length 70 [2021-08-06 18:45:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:21,874 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 848 transitions. [2021-08-06 18:45:21,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 848 transitions. [2021-08-06 18:45:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-06 18:45:21,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:21,875 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:21,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 18:45:22,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:22,085 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:22,085 INFO L82 PathProgramCache]: Analyzing trace with hash -858195685, now seen corresponding path program 22 times [2021-08-06 18:45:22,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:22,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431777973] [2021-08-06 18:45:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:22,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:22,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:22,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:22,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:22,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:22,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:22,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:22,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:22,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431777973] [2021-08-06 18:45:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431777973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:22,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350387805] [2021-08-06 18:45:22,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:22,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:22,217 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) [2021-08-06 18:45:22,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 18:45:23,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:23,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:23,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:23,361 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:23,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:23,371 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:23,372 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:23,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350387805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:23,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:23,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-06 18:45:23,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781400019] [2021-08-06 18:45:23,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:23,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:23,377 INFO L87 Difference]: Start difference. First operand 620 states and 848 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:23,797 INFO L93 Difference]: Finished difference Result 1417 states and 1808 transitions. [2021-08-06 18:45:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:45:23,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-06 18:45:23,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:23,801 INFO L225 Difference]: With dead ends: 1417 [2021-08-06 18:45:23,801 INFO L226 Difference]: Without dead ends: 1214 [2021-08-06 18:45:23,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:45:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-08-06 18:45:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 633. [2021-08-06 18:45:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 625 states have (on average 1.3664) internal successors, (854), 632 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 854 transitions. [2021-08-06 18:45:23,811 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 854 transitions. Word has length 70 [2021-08-06 18:45:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:23,811 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 854 transitions. [2021-08-06 18:45:23,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 854 transitions. [2021-08-06 18:45:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:23,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:23,812 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:23,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 18:45:24,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-06 18:45:24,033 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:24,033 INFO L82 PathProgramCache]: Analyzing trace with hash -884648458, now seen corresponding path program 23 times [2021-08-06 18:45:24,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:24,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683237088] [2021-08-06 18:45:24,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:24,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:24,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:24,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:24,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:24,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:24,162 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:24,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:24,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:24,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683237088] [2021-08-06 18:45:24,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683237088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:24,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792570193] [2021-08-06 18:45:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:24,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:24,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:24,196 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) [2021-08-06 18:45:24,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 18:45:24,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:45:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:24,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:25,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:25,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:25,510 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:25,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:25,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:25,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792570193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:25,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:25,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:25,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660640044] [2021-08-06 18:45:25,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:25,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:25,526 INFO L87 Difference]: Start difference. First operand 633 states and 854 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:25,753 INFO L93 Difference]: Finished difference Result 1274 states and 1632 transitions. [2021-08-06 18:45:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:45:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:25,755 INFO L225 Difference]: With dead ends: 1274 [2021-08-06 18:45:25,756 INFO L226 Difference]: Without dead ends: 1124 [2021-08-06 18:45:25,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:45:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-08-06 18:45:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 633. [2021-08-06 18:45:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 625 states have (on average 1.3664) internal successors, (854), 632 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 854 transitions. [2021-08-06 18:45:25,766 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 854 transitions. Word has length 75 [2021-08-06 18:45:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:25,767 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 854 transitions. [2021-08-06 18:45:25,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 854 transitions. [2021-08-06 18:45:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:25,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:25,768 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:25,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:25,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 18:45:25,973 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:25,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:25,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1211040248, now seen corresponding path program 24 times [2021-08-06 18:45:25,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:25,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546988875] [2021-08-06 18:45:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:25,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:26,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:26,025 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:26,032 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:26,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:26,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:26,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:26,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:26,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546988875] [2021-08-06 18:45:26,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546988875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:26,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078588855] [2021-08-06 18:45:26,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:26,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:26,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:26,129 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:26,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 18:45:27,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:45:27,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:27,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:27,241 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:27,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:27,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:27,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:27,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:27,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078588855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:27,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:27,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:27,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307996959] [2021-08-06 18:45:27,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:27,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:27,481 INFO L87 Difference]: Start difference. First operand 633 states and 854 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:27,727 INFO L93 Difference]: Finished difference Result 1419 states and 1802 transitions. [2021-08-06 18:45:27,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:27,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:27,730 INFO L225 Difference]: With dead ends: 1419 [2021-08-06 18:45:27,730 INFO L226 Difference]: Without dead ends: 1269 [2021-08-06 18:45:27,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:45:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-08-06 18:45:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 633. [2021-08-06 18:45:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 625 states have (on average 1.3664) internal successors, (854), 632 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:27,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 854 transitions. [2021-08-06 18:45:27,741 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 854 transitions. Word has length 75 [2021-08-06 18:45:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:27,742 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 854 transitions. [2021-08-06 18:45:27,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 854 transitions. [2021-08-06 18:45:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:27,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:27,743 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:27,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:27,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:27,962 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash 54356090, now seen corresponding path program 25 times [2021-08-06 18:45:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485308817] [2021-08-06 18:45:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:27,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:28,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:28,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:28,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:28,029 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:28,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:28,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:28,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:28,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485308817] [2021-08-06 18:45:28,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485308817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:28,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961078485] [2021-08-06 18:45:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:28,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:28,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:28,096 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:28,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 18:45:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:28,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:29,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:29,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:29,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:29,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:29,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:29,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:29,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961078485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:29,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:29,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:29,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809722935] [2021-08-06 18:45:29,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:29,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:29,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:29,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:29,414 INFO L87 Difference]: Start difference. First operand 633 states and 854 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:29,697 INFO L93 Difference]: Finished difference Result 1379 states and 1742 transitions. [2021-08-06 18:45:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:45:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:29,699 INFO L225 Difference]: With dead ends: 1379 [2021-08-06 18:45:29,699 INFO L226 Difference]: Without dead ends: 1229 [2021-08-06 18:45:29,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:45:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-08-06 18:45:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 633. [2021-08-06 18:45:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 625 states have (on average 1.3664) internal successors, (854), 632 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 854 transitions. [2021-08-06 18:45:29,708 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 854 transitions. Word has length 75 [2021-08-06 18:45:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:29,708 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 854 transitions. [2021-08-06 18:45:29,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 854 transitions. [2021-08-06 18:45:29,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:29,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:29,710 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:29,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:29,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:29,919 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1784698500, now seen corresponding path program 26 times [2021-08-06 18:45:29,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:29,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019001852] [2021-08-06 18:45:29,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:29,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:29,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:30,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:30,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:30,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:30,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:30,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:30,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:30,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019001852] [2021-08-06 18:45:30,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019001852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:30,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419194113] [2021-08-06 18:45:30,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:30,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:30,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:30,048 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:30,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 18:45:30,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:31,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:31,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:31,350 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:31,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:31,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:31,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:31,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419194113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:31,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:31,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:31,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110577891] [2021-08-06 18:45:31,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:31,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:31,366 INFO L87 Difference]: Start difference. First operand 633 states and 854 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:31,714 INFO L93 Difference]: Finished difference Result 1811 states and 2291 transitions. [2021-08-06 18:45:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:45:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:31,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:31,717 INFO L225 Difference]: With dead ends: 1811 [2021-08-06 18:45:31,718 INFO L226 Difference]: Without dead ends: 1649 [2021-08-06 18:45:31,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 296.5ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:45:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-08-06 18:45:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 641. [2021-08-06 18:45:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 633 states have (on average 1.377567140600316) internal successors, (872), 640 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 872 transitions. [2021-08-06 18:45:31,730 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 872 transitions. Word has length 75 [2021-08-06 18:45:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:31,730 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 872 transitions. [2021-08-06 18:45:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 872 transitions. [2021-08-06 18:45:31,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:31,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:31,732 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:31,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:31,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:31,945 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1741585640, now seen corresponding path program 27 times [2021-08-06 18:45:31,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:31,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296208602] [2021-08-06 18:45:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:31,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:32,032 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:32,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:32,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:32,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:32,056 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:32,057 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:32,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:32,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296208602] [2021-08-06 18:45:32,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296208602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:32,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689159737] [2021-08-06 18:45:32,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:32,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:32,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:32,087 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:32,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 18:45:33,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:45:33,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:33,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:33,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:33,407 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:33,415 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:33,416 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:33,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:33,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:33,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689159737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:33,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:33,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:33,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999963925] [2021-08-06 18:45:33,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:33,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:33,430 INFO L87 Difference]: Start difference. First operand 641 states and 872 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:33,804 INFO L93 Difference]: Finished difference Result 1277 states and 1601 transitions. [2021-08-06 18:45:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:45:33,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:33,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:33,806 INFO L225 Difference]: With dead ends: 1277 [2021-08-06 18:45:33,806 INFO L226 Difference]: Without dead ends: 1154 [2021-08-06 18:45:33,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:45:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-08-06 18:45:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 658. [2021-08-06 18:45:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 650 states have (on average 1.363076923076923) internal successors, (886), 657 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 886 transitions. [2021-08-06 18:45:33,813 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 886 transitions. Word has length 75 [2021-08-06 18:45:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:33,813 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 886 transitions. [2021-08-06 18:45:33,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 886 transitions. [2021-08-06 18:45:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:33,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:33,814 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:33,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:34,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 18:45:34,025 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:34,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:34,026 INFO L82 PathProgramCache]: Analyzing trace with hash -634211792, now seen corresponding path program 28 times [2021-08-06 18:45:34,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:34,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831788818] [2021-08-06 18:45:34,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:34,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-06 18:45:34,045 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-06 18:45:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-06 18:45:34,074 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-06 18:45:34,075 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-06 18:45:34,076 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-06 18:45:34,078 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 18:45:34,079 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 18:45:34,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-08-06 18:45:34,083 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 18:45:34,083 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 18:45:34,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 06:45:34 BasicIcfg [2021-08-06 18:45:34,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 18:45:34,164 INFO L168 Benchmark]: Toolchain (without parser) took 48953.14 ms. Allocated memory was 188.7 MB in the beginning and 566.2 MB in the end (delta: 377.5 MB). Free memory was 153.0 MB in the beginning and 339.0 MB in the end (delta: -186.1 MB). Peak memory consumption was 192.5 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:34,164 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 188.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 18:45:34,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 494.88 ms. Allocated memory is still 188.7 MB. Free memory was 152.8 MB in the beginning and 163.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:34,165 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.88 ms. Allocated memory is still 188.7 MB. Free memory was 163.5 MB in the beginning and 161.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:34,165 INFO L168 Benchmark]: Boogie Preprocessor took 37.10 ms. Allocated memory is still 188.7 MB. Free memory was 161.4 MB in the beginning and 160.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:34,165 INFO L168 Benchmark]: RCFGBuilder took 479.60 ms. Allocated memory is still 188.7 MB. Free memory was 160.4 MB in the beginning and 138.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:34,165 INFO L168 Benchmark]: TraceAbstraction took 47881.79 ms. Allocated memory was 188.7 MB in the beginning and 566.2 MB in the end (delta: 377.5 MB). Free memory was 137.9 MB in the beginning and 339.0 MB in the end (delta: -201.2 MB). Peak memory consumption was 177.9 MB. Max. memory is 8.0 GB. [2021-08-06 18:45:34,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 188.7 MB. Free memory is still 170.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 494.88 ms. Allocated memory is still 188.7 MB. Free memory was 152.8 MB in the beginning and 163.5 MB in the end (delta: -10.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 52.88 ms. Allocated memory is still 188.7 MB. Free memory was 163.5 MB in the beginning and 161.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.10 ms. Allocated memory is still 188.7 MB. Free memory was 161.4 MB in the beginning and 160.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 479.60 ms. Allocated memory is still 188.7 MB. Free memory was 160.4 MB in the beginning and 138.4 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 47881.79 ms. Allocated memory was 188.7 MB in the beginning and 566.2 MB in the end (delta: 377.5 MB). Free memory was 137.9 MB in the beginning and 339.0 MB in the end (delta: -201.2 MB). Peak memory consumption was 177.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1969, positive: 1680, positive conditional: 1680, positive unconditional: 0, negative: 289, negative conditional: 289, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1699, positive: 1680, positive conditional: 0, positive unconditional: 1680, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 330, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 330, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1699, positive: 1353, positive conditional: 0, positive unconditional: 1353, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 330, unknown conditional: 0, unknown unconditional: 330] , Statistics on independence cache: Total cache size (in pairs): 330, Positive cache size: 327, Positive conditional cache size: 0, Positive unconditional cache size: 327, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 270 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=1, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=1, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 47698.6ms, OverallIterations: 37, TraceHistogramMax: 5, EmptinessCheckTime: 58.5ms, AutomataDifference: 8014.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 189.9ms, PartialOrderReductionTime: 169.7ms, HoareTripleCheckerStatistics: 2874 SDtfs, 10990 SDslu, 16431 SDs, 0 SdLazy, 3507 SolverSat, 1333 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2067.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2656 GetRequests, 1862 SyntacticMatches, 0 SemanticMatches, 794 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 6902.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=780occurred in iteration=0, InterpolantAutomatonStates: 682, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 421.0ms AutomataMinimizationTime, 36 MinimizatonAttempts, 17686 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 396.2ms SsaConstructionTime, 881.2ms SatisfiabilityAnalysisTime, 16565.7ms InterpolantComputationTime, 4018 NumberOfCodeBlocks, 4018 NumberOfCodeBlocksAsserted, 113 NumberOfCheckSat, 3872 ConstructedInterpolants, 0 QuantifiedInterpolants, 14930 SizeOfPredicates, 224 NumberOfNonLiveVariables, 4408 ConjunctsInSsa, 379 ConjunctsInUnsatCore, 66 InterpolantComputations, 6 PerfectInterpolantSequences, 0/1624 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-06 18:45:34,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...