/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 16:39:29,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 16:39:29,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 16:39:29,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 16:39:29,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 16:39:29,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 16:39:29,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 16:39:29,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 16:39:29,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 16:39:30,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 16:39:30,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 16:39:30,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 16:39:30,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 16:39:30,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 16:39:30,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 16:39:30,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 16:39:30,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 16:39:30,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 16:39:30,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 16:39:30,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 16:39:30,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 16:39:30,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 16:39:30,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 16:39:30,038 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 16:39:30,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 16:39:30,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 16:39:30,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 16:39:30,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 16:39:30,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 16:39:30,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 16:39:30,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 16:39:30,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 16:39:30,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 16:39:30,094 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 16:39:30,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 16:39:30,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 16:39:30,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 16:39:30,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 16:39:30,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 16:39:30,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 16:39:30,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 16:39:30,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 16:39:30,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 16:39:30,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 16:39:30,096 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 16:39:30,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 16:39:30,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 16:39:30,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 16:39:30,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 16:39:30,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 16:39:30,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 16:39:30,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 16:39:30,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 16:39:30,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 16:39:30,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 16:39:30,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 16:39:30,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 16:39:30,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 16:39:30,099 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 16:39:30,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 16:39:30,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 16:39:30,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 16:39:30,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 16:39:30,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 16:39:30,432 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 16:39:30,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-08-21 16:39:30,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78cb6b3d/3a3b6f34bdee4ce7a8ef425571c1dad2/FLAGd7ddb088c [2021-08-21 16:39:31,195 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 16:39:31,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-08-21 16:39:31,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78cb6b3d/3a3b6f34bdee4ce7a8ef425571c1dad2/FLAGd7ddb088c [2021-08-21 16:39:31,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78cb6b3d/3a3b6f34bdee4ce7a8ef425571c1dad2 [2021-08-21 16:39:31,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 16:39:31,507 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 16:39:31,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 16:39:31,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 16:39:31,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 16:39:31,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:31,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79eb321b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31, skipping insertion in model container [2021-08-21 16:39:31,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:31,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 16:39:31,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 16:39:31,878 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-08-21 16:39:31,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 16:39:31,887 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 16:39:31,934 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-08-21 16:39:31,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 16:39:31,971 INFO L208 MainTranslator]: Completed translation [2021-08-21 16:39:31,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31 WrapperNode [2021-08-21 16:39:31,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 16:39:31,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 16:39:31,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 16:39:31,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 16:39:31,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 16:39:32,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 16:39:32,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 16:39:32,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 16:39:32,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 16:39:32,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 16:39:32,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 16:39:32,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 16:39:32,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (1/1) ... [2021-08-21 16:39:32,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 16:39:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:32,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 16:39:32,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 16:39:32,140 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-21 16:39:32,140 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-21 16:39:32,142 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 16:39:32,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-21 16:39:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 16:39:32,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 16:39:32,144 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 16:39:32,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 16:39:32,520 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-21 16:39:32,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:32 BoogieIcfgContainer [2021-08-21 16:39:32,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 16:39:32,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 16:39:32,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 16:39:32,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 16:39:32,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:31" (1/3) ... [2021-08-21 16:39:32,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e46976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:32, skipping insertion in model container [2021-08-21 16:39:32,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:31" (2/3) ... [2021-08-21 16:39:32,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e46976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:32, skipping insertion in model container [2021-08-21 16:39:32,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:32" (3/3) ... [2021-08-21 16:39:32,530 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-08-21 16:39:32,534 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 16:39:32,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 16:39:32,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 16:39:32,534 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 16:39:32,567 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,568 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,568 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,569 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,570 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,571 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,571 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,571 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,571 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,571 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,572 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,572 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,572 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,573 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,573 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,573 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,573 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,573 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,573 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,574 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,574 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,574 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,575 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,575 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,575 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,575 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,576 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,577 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,578 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,578 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,578 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,578 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,578 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,578 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,580 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,580 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,584 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,584 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,584 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,595 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,596 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,596 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:39:32,599 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 16:39:32,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 16:39:32,651 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 16:39:32,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 16:39:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 16:39:32,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:32,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:32,868 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:32,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:32,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-08-21 16:39:32,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:32,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630859709] [2021-08-21 16:39:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:32,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:33,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:33,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630859709] [2021-08-21 16:39:33,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630859709] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:33,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:33,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 16:39:33,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627578293] [2021-08-21 16:39:33,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 16:39:33,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 16:39:33,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 16:39:33,314 INFO L87 Difference]: Start difference. First operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:33,467 INFO L93 Difference]: Finished difference Result 1539 states and 1811 transitions. [2021-08-21 16:39:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 16:39:33,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 16:39:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:33,500 INFO L225 Difference]: With dead ends: 1539 [2021-08-21 16:39:33,500 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 16:39:33,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:39:33,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 16:39:33,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 368. [2021-08-21 16:39:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 358 states have (on average 1.3575418994413408) internal successors, (486), 367 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 486 transitions. [2021-08-21 16:39:33,550 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 486 transitions. Word has length 32 [2021-08-21 16:39:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:33,551 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 486 transitions. [2021-08-21 16:39:33,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 486 transitions. [2021-08-21 16:39:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 16:39:33,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:33,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:33,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 16:39:33,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-08-21 16:39:33,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:33,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125091498] [2021-08-21 16:39:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:33,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:33,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:33,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125091498] [2021-08-21 16:39:33,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125091498] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:33,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:33,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 16:39:33,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857501682] [2021-08-21 16:39:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 16:39:33,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 16:39:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 16:39:33,744 INFO L87 Difference]: Start difference. First operand 368 states and 486 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:33,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:33,816 INFO L93 Difference]: Finished difference Result 550 states and 720 transitions. [2021-08-21 16:39:33,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 16:39:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 16:39:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:33,822 INFO L225 Difference]: With dead ends: 550 [2021-08-21 16:39:33,822 INFO L226 Difference]: Without dead ends: 392 [2021-08-21 16:39:33,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:39:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-21 16:39:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 342. [2021-08-21 16:39:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 334 states have (on average 1.3892215568862276) internal successors, (464), 341 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 464 transitions. [2021-08-21 16:39:33,847 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 464 transitions. Word has length 36 [2021-08-21 16:39:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:33,847 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 464 transitions. [2021-08-21 16:39:33,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:33,847 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 464 transitions. [2021-08-21 16:39:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 16:39:33,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:33,848 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:33,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 16:39:33,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-08-21 16:39:33,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:33,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919576294] [2021-08-21 16:39:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:33,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:33,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:33,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919576294] [2021-08-21 16:39:33,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919576294] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:33,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:33,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 16:39:33,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927631955] [2021-08-21 16:39:33,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 16:39:33,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 16:39:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 16:39:33,929 INFO L87 Difference]: Start difference. First operand 342 states and 464 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:34,007 INFO L93 Difference]: Finished difference Result 431 states and 547 transitions. [2021-08-21 16:39:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 16:39:34,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 16:39:34,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:34,009 INFO L225 Difference]: With dead ends: 431 [2021-08-21 16:39:34,009 INFO L226 Difference]: Without dead ends: 359 [2021-08-21 16:39:34,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:39:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-21 16:39:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 289. [2021-08-21 16:39:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.3451957295373667) internal successors, (378), 288 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 378 transitions. [2021-08-21 16:39:34,016 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 378 transitions. Word has length 36 [2021-08-21 16:39:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:34,017 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 378 transitions. [2021-08-21 16:39:34,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 378 transitions. [2021-08-21 16:39:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:39:34,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:34,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:34,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 16:39:34,018 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:34,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash 10456968, now seen corresponding path program 1 times [2021-08-21 16:39:34,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:34,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077001611] [2021-08-21 16:39:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:34,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:34,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:34,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077001611] [2021-08-21 16:39:34,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077001611] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:34,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:34,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 16:39:34,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006915573] [2021-08-21 16:39:34,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 16:39:34,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 16:39:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 16:39:34,118 INFO L87 Difference]: Start difference. First operand 289 states and 378 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:34,218 INFO L93 Difference]: Finished difference Result 760 states and 975 transitions. [2021-08-21 16:39:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:39:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 16:39:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:34,221 INFO L225 Difference]: With dead ends: 760 [2021-08-21 16:39:34,222 INFO L226 Difference]: Without dead ends: 613 [2021-08-21 16:39:34,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:34,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-21 16:39:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 310. [2021-08-21 16:39:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 302 states have (on average 1.3410596026490067) internal successors, (405), 309 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 405 transitions. [2021-08-21 16:39:34,258 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 405 transitions. Word has length 40 [2021-08-21 16:39:34,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:34,261 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 405 transitions. [2021-08-21 16:39:34,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 405 transitions. [2021-08-21 16:39:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:39:34,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:34,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:34,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 16:39:34,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1198227988, now seen corresponding path program 2 times [2021-08-21 16:39:34,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:34,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040466827] [2021-08-21 16:39:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:34,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:34,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:34,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040466827] [2021-08-21 16:39:34,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040466827] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:34,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:34,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:39:34,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4966655] [2021-08-21 16:39:34,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:39:34,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:39:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:39:34,396 INFO L87 Difference]: Start difference. First operand 310 states and 405 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:34,482 INFO L93 Difference]: Finished difference Result 531 states and 680 transitions. [2021-08-21 16:39:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 16:39:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 16:39:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:34,485 INFO L225 Difference]: With dead ends: 531 [2021-08-21 16:39:34,485 INFO L226 Difference]: Without dead ends: 451 [2021-08-21 16:39:34,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:39:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-21 16:39:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 329. [2021-08-21 16:39:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 321 states have (on average 1.35202492211838) internal successors, (434), 328 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 434 transitions. [2021-08-21 16:39:34,494 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 434 transitions. Word has length 40 [2021-08-21 16:39:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:34,494 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 434 transitions. [2021-08-21 16:39:34,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 434 transitions. [2021-08-21 16:39:34,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:39:34,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:34,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:34,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 16:39:34,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:34,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 3 times [2021-08-21 16:39:34,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:34,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700386920] [2021-08-21 16:39:34,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:34,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:34,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:34,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700386920] [2021-08-21 16:39:34,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700386920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:34,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:34,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:39:34,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071982953] [2021-08-21 16:39:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:39:34,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:39:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:39:34,608 INFO L87 Difference]: Start difference. First operand 329 states and 434 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:34,719 INFO L93 Difference]: Finished difference Result 1074 states and 1385 transitions. [2021-08-21 16:39:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:39:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 16:39:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:34,724 INFO L225 Difference]: With dead ends: 1074 [2021-08-21 16:39:34,724 INFO L226 Difference]: Without dead ends: 915 [2021-08-21 16:39:34,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:39:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-21 16:39:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 326. [2021-08-21 16:39:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.3773584905660377) internal successors, (438), 325 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 438 transitions. [2021-08-21 16:39:34,735 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 438 transitions. Word has length 40 [2021-08-21 16:39:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:34,736 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 438 transitions. [2021-08-21 16:39:34,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,736 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 438 transitions. [2021-08-21 16:39:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 16:39:34,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:34,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:34,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 16:39:34,737 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:34,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:34,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1960098348, now seen corresponding path program 4 times [2021-08-21 16:39:34,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:34,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097662852] [2021-08-21 16:39:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:34,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:34,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:34,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097662852] [2021-08-21 16:39:34,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097662852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:39:34,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:39:34,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:39:34,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959880802] [2021-08-21 16:39:34,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:39:34,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:39:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:39:34,820 INFO L87 Difference]: Start difference. First operand 326 states and 438 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:34,945 INFO L93 Difference]: Finished difference Result 538 states and 702 transitions. [2021-08-21 16:39:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:39:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 16:39:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:34,948 INFO L225 Difference]: With dead ends: 538 [2021-08-21 16:39:34,948 INFO L226 Difference]: Without dead ends: 415 [2021-08-21 16:39:34,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-21 16:39:34,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 318. [2021-08-21 16:39:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 310 states have (on average 1.3451612903225807) internal successors, (417), 317 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2021-08-21 16:39:34,958 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 40 [2021-08-21 16:39:34,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:34,959 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2021-08-21 16:39:34,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2021-08-21 16:39:34,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:39:34,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:34,960 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:34,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 16:39:34,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1405973461, now seen corresponding path program 1 times [2021-08-21 16:39:34,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:34,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035430966] [2021-08-21 16:39:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:34,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:35,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:35,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035430966] [2021-08-21 16:39:35,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035430966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:35,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997758086] [2021-08-21 16:39:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:35,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:35,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:35,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 16:39:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:39:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:35,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997758086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:35,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:35,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 16:39:35,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142700907] [2021-08-21 16:39:35,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 16:39:35,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:35,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 16:39:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:39:35,524 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:35,605 INFO L93 Difference]: Finished difference Result 576 states and 743 transitions. [2021-08-21 16:39:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:39:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 16:39:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:35,607 INFO L225 Difference]: With dead ends: 576 [2021-08-21 16:39:35,607 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 16:39:35,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:39:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 16:39:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 337. [2021-08-21 16:39:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.3525835866261398) internal successors, (445), 336 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 445 transitions. [2021-08-21 16:39:35,615 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 445 transitions. Word has length 45 [2021-08-21 16:39:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:35,615 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 445 transitions. [2021-08-21 16:39:35,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:35,616 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 445 transitions. [2021-08-21 16:39:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:39:35,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:35,616 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:35,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:35,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:35,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1975051127, now seen corresponding path program 2 times [2021-08-21 16:39:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:35,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813970084] [2021-08-21 16:39:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:35,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:35,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:35,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813970084] [2021-08-21 16:39:35,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813970084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:35,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267664419] [2021-08-21 16:39:35,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:39:35,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:35,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:35,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:35,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 16:39:36,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:39:36,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:36,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:39:36,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:36,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267664419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:36,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:36,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-21 16:39:36,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019550108] [2021-08-21 16:39:36,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 16:39:36,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 16:39:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 16:39:36,213 INFO L87 Difference]: Start difference. First operand 337 states and 445 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:36,352 INFO L93 Difference]: Finished difference Result 1155 states and 1482 transitions. [2021-08-21 16:39:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:39:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 16:39:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:36,357 INFO L225 Difference]: With dead ends: 1155 [2021-08-21 16:39:36,357 INFO L226 Difference]: Without dead ends: 993 [2021-08-21 16:39:36,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:39:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-08-21 16:39:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 350. [2021-08-21 16:39:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 342 states have (on average 1.3830409356725146) internal successors, (473), 349 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 473 transitions. [2021-08-21 16:39:36,369 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 473 transitions. Word has length 45 [2021-08-21 16:39:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:36,370 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 473 transitions. [2021-08-21 16:39:36,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 473 transitions. [2021-08-21 16:39:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:39:36,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:36,371 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:36,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:36,592 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,SelfDestructingSolverStorable8 [2021-08-21 16:39:36,593 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1931938267, now seen corresponding path program 3 times [2021-08-21 16:39:36,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:36,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770815139] [2021-08-21 16:39:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:36,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:36,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:36,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770815139] [2021-08-21 16:39:36,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770815139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:36,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859315866] [2021-08-21 16:39:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:39:36,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:36,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:36,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 16:39:36,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 16:39:36,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:36,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:39:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:36,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859315866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:36,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:36,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 16:39:36,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276156550] [2021-08-21 16:39:36,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 16:39:36,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 16:39:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:39:36,983 INFO L87 Difference]: Start difference. First operand 350 states and 473 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:37,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:37,243 INFO L93 Difference]: Finished difference Result 816 states and 1055 transitions. [2021-08-21 16:39:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:39:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 16:39:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:37,246 INFO L225 Difference]: With dead ends: 816 [2021-08-21 16:39:37,246 INFO L226 Difference]: Without dead ends: 613 [2021-08-21 16:39:37,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 200.9ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:39:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-21 16:39:37,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 363. [2021-08-21 16:39:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 355 states have (on average 1.3492957746478873) internal successors, (479), 362 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 479 transitions. [2021-08-21 16:39:37,256 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 479 transitions. Word has length 45 [2021-08-21 16:39:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:37,256 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 479 transitions. [2021-08-21 16:39:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 479 transitions. [2021-08-21 16:39:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 16:39:37,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:37,258 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:37,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:37,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:37,473 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1343306368, now seen corresponding path program 1 times [2021-08-21 16:39:37,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:37,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997884101] [2021-08-21 16:39:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:37,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:37,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:37,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997884101] [2021-08-21 16:39:37,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997884101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317633954] [2021-08-21 16:39:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:37,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:37,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:37,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 16:39:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:39:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:37,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317633954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:37,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:37,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 16:39:37,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723855994] [2021-08-21 16:39:37,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 16:39:37,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 16:39:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:39:37,897 INFO L87 Difference]: Start difference. First operand 363 states and 479 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:38,046 INFO L93 Difference]: Finished difference Result 872 states and 1116 transitions. [2021-08-21 16:39:38,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 16:39:38,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 16:39:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:38,049 INFO L225 Difference]: With dead ends: 872 [2021-08-21 16:39:38,049 INFO L226 Difference]: Without dead ends: 712 [2021-08-21 16:39:38,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:39:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-08-21 16:39:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 457. [2021-08-21 16:39:38,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 449 states have (on average 1.3273942093541202) internal successors, (596), 456 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 596 transitions. [2021-08-21 16:39:38,060 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 596 transitions. Word has length 45 [2021-08-21 16:39:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:38,060 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 596 transitions. [2021-08-21 16:39:38,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 596 transitions. [2021-08-21 16:39:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:38,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:38,061 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:38,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:38,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:38,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:38,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:38,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1255548572, now seen corresponding path program 1 times [2021-08-21 16:39:38,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:38,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662649875] [2021-08-21 16:39:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:38,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:38,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:38,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662649875] [2021-08-21 16:39:38,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662649875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:38,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853902174] [2021-08-21 16:39:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:38,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:38,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:38,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 16:39:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:39:38,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:38,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853902174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:38,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:38,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 16:39:38,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901484887] [2021-08-21 16:39:38,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:39:38,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:39:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:39:38,807 INFO L87 Difference]: Start difference. First operand 457 states and 596 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:38,914 INFO L93 Difference]: Finished difference Result 751 states and 964 transitions. [2021-08-21 16:39:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 16:39:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:38,917 INFO L225 Difference]: With dead ends: 751 [2021-08-21 16:39:38,917 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 16:39:38,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:39:38,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 16:39:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 487. [2021-08-21 16:39:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 479 states have (on average 1.3277661795407099) internal successors, (636), 486 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 636 transitions. [2021-08-21 16:39:38,926 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 636 transitions. Word has length 55 [2021-08-21 16:39:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:38,927 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 636 transitions. [2021-08-21 16:39:38,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 636 transitions. [2021-08-21 16:39:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:38,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:38,928 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:38,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:39,152 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,SelfDestructingSolverStorable11 [2021-08-21 16:39:39,153 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:39,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1912973754, now seen corresponding path program 2 times [2021-08-21 16:39:39,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:39,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405255531] [2021-08-21 16:39:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:39,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:39,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:39,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405255531] [2021-08-21 16:39:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405255531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:39,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321001207] [2021-08-21 16:39:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:39:39,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:39,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:39,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:39,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 16:39:39,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:39:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:39:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:39,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321001207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:39,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:39,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-21 16:39:39,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408357569] [2021-08-21 16:39:39,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:39:39,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:39:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:39,780 INFO L87 Difference]: Start difference. First operand 487 states and 636 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:39,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:39,961 INFO L93 Difference]: Finished difference Result 1232 states and 1563 transitions. [2021-08-21 16:39:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:39:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:39,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:39,965 INFO L225 Difference]: With dead ends: 1232 [2021-08-21 16:39:39,965 INFO L226 Difference]: Without dead ends: 1024 [2021-08-21 16:39:39,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:39:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-08-21 16:39:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 502. [2021-08-21 16:39:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 494 states have (on average 1.3380566801619433) internal successors, (661), 501 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 661 transitions. [2021-08-21 16:39:39,977 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 661 transitions. Word has length 55 [2021-08-21 16:39:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:39,977 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 661 transitions. [2021-08-21 16:39:39,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 661 transitions. [2021-08-21 16:39:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:39,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:39,978 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:40,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 16:39:40,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:40,193 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1367396072, now seen corresponding path program 3 times [2021-08-21 16:39:40,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:40,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80202457] [2021-08-21 16:39:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:40,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:40,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:40,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80202457] [2021-08-21 16:39:40,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80202457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:40,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149517934] [2021-08-21 16:39:40,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:39:40,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:40,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:40,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:40,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 16:39:40,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 16:39:40,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:39:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149517934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:40,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:40,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 16:39:40,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979202521] [2021-08-21 16:39:40,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:39:40,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:40,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:39:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:39:40,727 INFO L87 Difference]: Start difference. First operand 502 states and 661 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:40,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:40,880 INFO L93 Difference]: Finished difference Result 943 states and 1199 transitions. [2021-08-21 16:39:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:39:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:40,883 INFO L225 Difference]: With dead ends: 943 [2021-08-21 16:39:40,883 INFO L226 Difference]: Without dead ends: 793 [2021-08-21 16:39:40,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-08-21 16:39:40,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 502. [2021-08-21 16:39:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 494 states have (on average 1.3380566801619433) internal successors, (661), 501 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 661 transitions. [2021-08-21 16:39:40,895 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 661 transitions. Word has length 55 [2021-08-21 16:39:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:40,895 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 661 transitions. [2021-08-21 16:39:40,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 661 transitions. [2021-08-21 16:39:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:40,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:40,896 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:40,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:41,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:41,121 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:41,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1088516634, now seen corresponding path program 4 times [2021-08-21 16:39:41,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:41,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918027433] [2021-08-21 16:39:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:41,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:41,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:41,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918027433] [2021-08-21 16:39:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918027433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:41,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414458813] [2021-08-21 16:39:41,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:39:41,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:41,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:41,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 16:39:41,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:39:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:39:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:41,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414458813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:41,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:41,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-21 16:39:41,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522781709] [2021-08-21 16:39:41,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 16:39:41,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:41,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 16:39:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:39:41,707 INFO L87 Difference]: Start difference. First operand 502 states and 661 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:41,952 INFO L93 Difference]: Finished difference Result 1559 states and 1992 transitions. [2021-08-21 16:39:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:39:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:41,957 INFO L225 Difference]: With dead ends: 1559 [2021-08-21 16:39:41,957 INFO L226 Difference]: Without dead ends: 1354 [2021-08-21 16:39:41,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:39:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-08-21 16:39:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 515. [2021-08-21 16:39:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 507 states have (on average 1.3609467455621302) internal successors, (690), 514 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 690 transitions. [2021-08-21 16:39:41,973 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 690 transitions. Word has length 55 [2021-08-21 16:39:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:41,973 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 690 transitions. [2021-08-21 16:39:41,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 690 transitions. [2021-08-21 16:39:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:41,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:41,974 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:41,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:42,188 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,SelfDestructingSolverStorable14 [2021-08-21 16:39:42,189 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1131629494, now seen corresponding path program 5 times [2021-08-21 16:39:42,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:42,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592525642] [2021-08-21 16:39:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:42,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:42,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:42,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592525642] [2021-08-21 16:39:42,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592525642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:42,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408646398] [2021-08-21 16:39:42,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:39:42,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:42,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:42,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:42,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 16:39:42,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:39:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:39:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:42,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408646398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:42,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:42,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-21 16:39:42,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660498695] [2021-08-21 16:39:42,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:39:42,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:39:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:39:42,757 INFO L87 Difference]: Start difference. First operand 515 states and 690 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:43,097 INFO L93 Difference]: Finished difference Result 1210 states and 1536 transitions. [2021-08-21 16:39:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:39:43,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:43,100 INFO L225 Difference]: With dead ends: 1210 [2021-08-21 16:39:43,101 INFO L226 Difference]: Without dead ends: 1007 [2021-08-21 16:39:43,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-21 16:39:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-08-21 16:39:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 527. [2021-08-21 16:39:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 519 states have (on average 1.3352601156069364) internal successors, (693), 526 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 693 transitions. [2021-08-21 16:39:43,114 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 693 transitions. Word has length 55 [2021-08-21 16:39:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:43,115 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 693 transitions. [2021-08-21 16:39:43,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 693 transitions. [2021-08-21 16:39:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:43,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:43,118 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:43,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:43,341 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,SelfDestructingSolverStorable15 [2021-08-21 16:39:43,342 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:43,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:43,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1976857068, now seen corresponding path program 6 times [2021-08-21 16:39:43,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:43,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90716075] [2021-08-21 16:39:43,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:43,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:43,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:43,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90716075] [2021-08-21 16:39:43,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90716075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:43,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570347948] [2021-08-21 16:39:43,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:39:43,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:43,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:43,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:43,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 16:39:43,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 16:39:43,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:43,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:39:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:43,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570347948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:43,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:43,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 16:39:43,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088054920] [2021-08-21 16:39:43,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 16:39:43,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 16:39:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:39:43,938 INFO L87 Difference]: Start difference. First operand 527 states and 693 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:44,047 INFO L93 Difference]: Finished difference Result 996 states and 1277 transitions. [2021-08-21 16:39:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 16:39:44,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:44,050 INFO L225 Difference]: With dead ends: 996 [2021-08-21 16:39:44,050 INFO L226 Difference]: Without dead ends: 843 [2021-08-21 16:39:44,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:39:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-08-21 16:39:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 497. [2021-08-21 16:39:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 489 states have (on average 1.3456032719836402) internal successors, (658), 496 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 658 transitions. [2021-08-21 16:39:44,061 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 658 transitions. Word has length 55 [2021-08-21 16:39:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:44,061 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 658 transitions. [2021-08-21 16:39:44,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:44,061 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 658 transitions. [2021-08-21 16:39:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:44,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:44,062 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:44,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:44,285 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,SelfDestructingSolverStorable16 [2021-08-21 16:39:44,285 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:44,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash -643963744, now seen corresponding path program 7 times [2021-08-21 16:39:44,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:44,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167561876] [2021-08-21 16:39:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:44,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:44,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:44,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167561876] [2021-08-21 16:39:44,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167561876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:44,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491011111] [2021-08-21 16:39:44,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:39:44,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:44,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:44,359 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:44,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 16:39:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:44,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:39:44,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:44,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491011111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:44,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:44,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 16:39:44,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877587843] [2021-08-21 16:39:44,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 16:39:44,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 16:39:44,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:39:44,901 INFO L87 Difference]: Start difference. First operand 497 states and 658 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:45,050 INFO L93 Difference]: Finished difference Result 1428 states and 1838 transitions. [2021-08-21 16:39:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 16:39:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:45,055 INFO L225 Difference]: With dead ends: 1428 [2021-08-21 16:39:45,055 INFO L226 Difference]: Without dead ends: 1260 [2021-08-21 16:39:45,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:39:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-08-21 16:39:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 466. [2021-08-21 16:39:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 458 states have (on average 1.3777292576419213) internal successors, (631), 465 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 631 transitions. [2021-08-21 16:39:45,068 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 631 transitions. Word has length 55 [2021-08-21 16:39:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:45,068 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 631 transitions. [2021-08-21 16:39:45,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 631 transitions. [2021-08-21 16:39:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 16:39:45,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:45,069 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:45,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:45,289 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,SelfDestructingSolverStorable17 [2021-08-21 16:39:45,290 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1138710351, now seen corresponding path program 8 times [2021-08-21 16:39:45,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:45,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24548711] [2021-08-21 16:39:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:45,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:45,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:45,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24548711] [2021-08-21 16:39:45,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24548711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:45,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669532049] [2021-08-21 16:39:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:39:45,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:45,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:45,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 16:39:45,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:39:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:39:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:45,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669532049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:45,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:45,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-21 16:39:45,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309994288] [2021-08-21 16:39:45,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:39:45,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:39:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:39:45,877 INFO L87 Difference]: Start difference. First operand 466 states and 631 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:46,104 INFO L93 Difference]: Finished difference Result 1121 states and 1432 transitions. [2021-08-21 16:39:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:39:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 16:39:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:46,108 INFO L225 Difference]: With dead ends: 1121 [2021-08-21 16:39:46,108 INFO L226 Difference]: Without dead ends: 918 [2021-08-21 16:39:46,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-08-21 16:39:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-08-21 16:39:46,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 577. [2021-08-21 16:39:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 569 states have (on average 1.3356766256590509) internal successors, (760), 576 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 760 transitions. [2021-08-21 16:39:46,119 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 760 transitions. Word has length 55 [2021-08-21 16:39:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:46,119 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 760 transitions. [2021-08-21 16:39:46,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 760 transitions. [2021-08-21 16:39:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:46,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:46,120 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:46,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:46,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:46,341 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2043402291, now seen corresponding path program 9 times [2021-08-21 16:39:46,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:46,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551811370] [2021-08-21 16:39:46,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:46,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:46,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:46,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551811370] [2021-08-21 16:39:46,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551811370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:46,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014615543] [2021-08-21 16:39:46,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:39:46,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:46,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:46,457 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:46,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 16:39:46,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:39:46,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:46,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:46,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:47,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014615543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:47,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:47,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:39:47,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112899236] [2021-08-21 16:39:47,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:39:47,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:39:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:47,106 INFO L87 Difference]: Start difference. First operand 577 states and 760 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:47,243 INFO L93 Difference]: Finished difference Result 921 states and 1188 transitions. [2021-08-21 16:39:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:39:47,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:47,246 INFO L225 Difference]: With dead ends: 921 [2021-08-21 16:39:47,246 INFO L226 Difference]: Without dead ends: 771 [2021-08-21 16:39:47,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-21 16:39:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 607. [2021-08-21 16:39:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 599 states have (on average 1.335559265442404) internal successors, (800), 606 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 800 transitions. [2021-08-21 16:39:47,257 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 800 transitions. Word has length 65 [2021-08-21 16:39:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:47,258 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 800 transitions. [2021-08-21 16:39:47,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 800 transitions. [2021-08-21 16:39:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:47,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:47,259 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:47,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:47,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-08-21 16:39:47,483 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1670194955, now seen corresponding path program 10 times [2021-08-21 16:39:47,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:47,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61232239] [2021-08-21 16:39:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:47,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:47,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:47,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61232239] [2021-08-21 16:39:47,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61232239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:47,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321445805] [2021-08-21 16:39:47,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:39:47,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:47,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:47,613 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:47,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 16:39:47,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:39:47,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:47,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:48,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321445805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:48,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:48,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-21 16:39:48,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708661433] [2021-08-21 16:39:48,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:39:48,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:39:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:39:48,353 INFO L87 Difference]: Start difference. First operand 607 states and 800 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:48,553 INFO L93 Difference]: Finished difference Result 1502 states and 1907 transitions. [2021-08-21 16:39:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:39:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:48,558 INFO L225 Difference]: With dead ends: 1502 [2021-08-21 16:39:48,558 INFO L226 Difference]: Without dead ends: 1294 [2021-08-21 16:39:48,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:39:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-21 16:39:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 622. [2021-08-21 16:39:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 614 states have (on average 1.3436482084690553) internal successors, (825), 621 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 825 transitions. [2021-08-21 16:39:48,573 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 825 transitions. Word has length 65 [2021-08-21 16:39:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:48,574 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 825 transitions. [2021-08-21 16:39:48,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 825 transitions. [2021-08-21 16:39:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:48,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:48,575 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:48,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:48,789 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash -160555289, now seen corresponding path program 11 times [2021-08-21 16:39:48,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:48,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615503638] [2021-08-21 16:39:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:48,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:48,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:48,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615503638] [2021-08-21 16:39:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615503638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:48,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009168537] [2021-08-21 16:39:48,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:39:48,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:48,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:48,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:48,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 16:39:49,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:39:49,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:49,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:49,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009168537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:49,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:49,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:39:49,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683921654] [2021-08-21 16:39:49,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:39:49,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:39:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:49,594 INFO L87 Difference]: Start difference. First operand 622 states and 825 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:49,759 INFO L93 Difference]: Finished difference Result 1163 states and 1483 transitions. [2021-08-21 16:39:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:39:49,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:49,764 INFO L225 Difference]: With dead ends: 1163 [2021-08-21 16:39:49,764 INFO L226 Difference]: Without dead ends: 1013 [2021-08-21 16:39:49,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:39:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-21 16:39:49,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 622. [2021-08-21 16:39:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 614 states have (on average 1.3436482084690553) internal successors, (825), 621 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 825 transitions. [2021-08-21 16:39:49,776 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 825 transitions. Word has length 65 [2021-08-21 16:39:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 825 transitions. [2021-08-21 16:39:49,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 825 transitions. [2021-08-21 16:39:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:49,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:49,778 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:49,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:49,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:49,989 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1317239447, now seen corresponding path program 12 times [2021-08-21 16:39:49,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:49,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617980705] [2021-08-21 16:39:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:49,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:50,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:50,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617980705] [2021-08-21 16:39:50,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617980705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:50,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350404478] [2021-08-21 16:39:50,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:39:50,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:50,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 16:39:50,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:39:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:50,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350404478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:50,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:50,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:39:50,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301414228] [2021-08-21 16:39:50,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:39:50,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:50,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:39:50,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:50,864 INFO L87 Difference]: Start difference. First operand 622 states and 825 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:51,085 INFO L93 Difference]: Finished difference Result 1323 states and 1661 transitions. [2021-08-21 16:39:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:39:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:51,089 INFO L225 Difference]: With dead ends: 1323 [2021-08-21 16:39:51,089 INFO L226 Difference]: Without dead ends: 1173 [2021-08-21 16:39:51,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:39:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-08-21 16:39:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 622. [2021-08-21 16:39:51,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 614 states have (on average 1.3436482084690553) internal successors, (825), 621 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 825 transitions. [2021-08-21 16:39:51,103 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 825 transitions. Word has length 65 [2021-08-21 16:39:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:51,103 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 825 transitions. [2021-08-21 16:39:51,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 825 transitions. [2021-08-21 16:39:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:51,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:51,105 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:51,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:51,328 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,SelfDestructingSolverStorable22 [2021-08-21 16:39:51,329 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:51,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673259, now seen corresponding path program 13 times [2021-08-21 16:39:51,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:51,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081526413] [2021-08-21 16:39:51,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:51,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:51,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:51,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081526413] [2021-08-21 16:39:51,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081526413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:51,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995723351] [2021-08-21 16:39:51,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:39:51,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:51,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:51,429 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:51,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 16:39:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:51,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:52,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995723351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:52,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:52,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-21 16:39:52,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131406090] [2021-08-21 16:39:52,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:39:52,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:39:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:39:52,181 INFO L87 Difference]: Start difference. First operand 622 states and 825 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:52,412 INFO L93 Difference]: Finished difference Result 1809 states and 2296 transitions. [2021-08-21 16:39:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:39:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:52,416 INFO L225 Difference]: With dead ends: 1809 [2021-08-21 16:39:52,416 INFO L226 Difference]: Without dead ends: 1604 [2021-08-21 16:39:52,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:39:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-08-21 16:39:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 635. [2021-08-21 16:39:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 627 states have (on average 1.3620414673046253) internal successors, (854), 634 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) [2021-08-21 16:39:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 854 transitions. [2021-08-21 16:39:52,431 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 854 transitions. Word has length 65 [2021-08-21 16:39:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:52,432 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 854 transitions. [2021-08-21 16:39:52,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 854 transitions. [2021-08-21 16:39:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:52,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:52,433 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:52,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:52,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:52,657 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1181786119, now seen corresponding path program 14 times [2021-08-21 16:39:52,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:52,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417707599] [2021-08-21 16:39:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:52,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:52,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:52,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417707599] [2021-08-21 16:39:52,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417707599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:52,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414161985] [2021-08-21 16:39:52,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:39:52,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:52,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:52,759 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:52,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 16:39:53,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:39:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:53,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414161985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:53,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:53,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-21 16:39:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515661096] [2021-08-21 16:39:53,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:39:53,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:53,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:39:53,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:39:53,435 INFO L87 Difference]: Start difference. First operand 635 states and 854 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:53,773 INFO L93 Difference]: Finished difference Result 1460 states and 1840 transitions. [2021-08-21 16:39:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:39:53,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:53,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:53,777 INFO L225 Difference]: With dead ends: 1460 [2021-08-21 16:39:53,777 INFO L226 Difference]: Without dead ends: 1257 [2021-08-21 16:39:53,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:39:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-08-21 16:39:53,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 647. [2021-08-21 16:39:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 639 states have (on average 1.3411580594679187) internal successors, (857), 646 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 857 transitions. [2021-08-21 16:39:53,790 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 857 transitions. Word has length 65 [2021-08-21 16:39:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:53,790 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 857 transitions. [2021-08-21 16:39:53,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 857 transitions. [2021-08-21 16:39:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:53,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:53,792 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:53,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:54,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:54,017 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1494016741, now seen corresponding path program 15 times [2021-08-21 16:39:54,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:54,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848154749] [2021-08-21 16:39:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:54,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:54,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:54,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848154749] [2021-08-21 16:39:54,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848154749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:54,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377832869] [2021-08-21 16:39:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:39:54,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:54,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:54,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 16:39:54,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 16:39:54,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:54,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:39:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:54,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377832869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:54,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:54,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 16:39:54,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106679362] [2021-08-21 16:39:54,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:39:54,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:39:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:39:54,903 INFO L87 Difference]: Start difference. First operand 647 states and 857 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:55,038 INFO L93 Difference]: Finished difference Result 1266 states and 1621 transitions. [2021-08-21 16:39:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:39:55,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 65 [2021-08-21 16:39:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:55,041 INFO L225 Difference]: With dead ends: 1266 [2021-08-21 16:39:55,041 INFO L226 Difference]: Without dead ends: 1113 [2021-08-21 16:39:55,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-21 16:39:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 617. [2021-08-21 16:39:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 609 states have (on average 1.3497536945812807) internal successors, (822), 616 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) [2021-08-21 16:39:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 822 transitions. [2021-08-21 16:39:55,052 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 822 transitions. Word has length 65 [2021-08-21 16:39:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:55,052 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 822 transitions. [2021-08-21 16:39:55,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:55,053 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 822 transitions. [2021-08-21 16:39:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:55,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:55,058 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:55,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-21 16:39:55,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:55,273 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1021478287, now seen corresponding path program 16 times [2021-08-21 16:39:55,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:55,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348631085] [2021-08-21 16:39:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:55,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:55,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:55,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:55,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348631085] [2021-08-21 16:39:55,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348631085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:55,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341740925] [2021-08-21 16:39:55,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:39:55,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:55,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:55,371 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:55,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 16:39:55,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:39:55,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:55,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:39:55,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:56,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341740925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:56,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:56,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 16:39:56,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030922013] [2021-08-21 16:39:56,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:39:56,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:56,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:39:56,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:39:56,145 INFO L87 Difference]: Start difference. First operand 617 states and 822 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:56,293 INFO L93 Difference]: Finished difference Result 1231 states and 1566 transitions. [2021-08-21 16:39:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:39:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 65 [2021-08-21 16:39:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:56,295 INFO L225 Difference]: With dead ends: 1231 [2021-08-21 16:39:56,295 INFO L226 Difference]: Without dead ends: 1078 [2021-08-21 16:39:56,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:39:56,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-21 16:39:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 587. [2021-08-21 16:39:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 579 states have (on average 1.3506044905008636) internal successors, (782), 586 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 782 transitions. [2021-08-21 16:39:56,306 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 782 transitions. Word has length 65 [2021-08-21 16:39:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:56,306 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 782 transitions. [2021-08-21 16:39:56,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 782 transitions. [2021-08-21 16:39:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:56,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:56,308 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:56,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:56,532 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,SelfDestructingSolverStorable26 [2021-08-21 16:39:56,532 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1281723055, now seen corresponding path program 17 times [2021-08-21 16:39:56,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:56,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107101245] [2021-08-21 16:39:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:56,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:56,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:56,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107101245] [2021-08-21 16:39:56,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107101245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:56,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845909938] [2021-08-21 16:39:56,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:39:56,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:56,617 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:56,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 16:39:57,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:39:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:39:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:39:57,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845909938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:57,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:57,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-21 16:39:57,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630635305] [2021-08-21 16:39:57,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 16:39:57,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:57,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 16:39:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-21 16:39:57,385 INFO L87 Difference]: Start difference. First operand 587 states and 782 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:57,581 INFO L93 Difference]: Finished difference Result 1628 states and 2082 transitions. [2021-08-21 16:39:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:39:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 65 [2021-08-21 16:39:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:57,585 INFO L225 Difference]: With dead ends: 1628 [2021-08-21 16:39:57,585 INFO L226 Difference]: Without dead ends: 1460 [2021-08-21 16:39:57,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:39:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-21 16:39:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 556. [2021-08-21 16:39:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 548 states have (on average 1.3777372262773722) internal successors, (755), 555 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:57,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 755 transitions. [2021-08-21 16:39:57,597 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 755 transitions. Word has length 65 [2021-08-21 16:39:57,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:57,597 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 755 transitions. [2021-08-21 16:39:57,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:57,597 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 755 transitions. [2021-08-21 16:39:57,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-21 16:39:57,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:57,598 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:57,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:57,821 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,SelfDestructingSolverStorable27 [2021-08-21 16:39:57,821 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1230570146, now seen corresponding path program 18 times [2021-08-21 16:39:57,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:57,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157857791] [2021-08-21 16:39:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:57,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:57,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:57,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157857791] [2021-08-21 16:39:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157857791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:57,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709896057] [2021-08-21 16:39:57,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:39:57,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:57,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:57,917 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:57,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 16:39:58,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:39:58,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:58,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:58,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:58,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709896057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:58,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:58,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-21 16:39:58,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527979599] [2021-08-21 16:39:58,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:39:58,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:58,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:39:58,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:39:58,711 INFO L87 Difference]: Start difference. First operand 556 states and 755 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:58,976 INFO L93 Difference]: Finished difference Result 1321 states and 1676 transitions. [2021-08-21 16:39:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:39:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-21 16:39:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:58,980 INFO L225 Difference]: With dead ends: 1321 [2021-08-21 16:39:58,980 INFO L226 Difference]: Without dead ends: 1118 [2021-08-21 16:39:58,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-08-21 16:39:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-08-21 16:39:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 697. [2021-08-21 16:39:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 689 states have (on average 1.3410740203193032) internal successors, (924), 696 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 924 transitions. [2021-08-21 16:39:59,004 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 924 transitions. Word has length 65 [2021-08-21 16:39:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:59,004 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 924 transitions. [2021-08-21 16:39:59,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 924 transitions. [2021-08-21 16:39:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:39:59,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:59,005 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:59,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:59,220 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,SelfDestructingSolverStorable28 [2021-08-21 16:39:59,221 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -143335358, now seen corresponding path program 19 times [2021-08-21 16:39:59,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:59,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278018472] [2021-08-21 16:39:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:59,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:59,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:59,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278018472] [2021-08-21 16:39:59,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278018472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:59,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576612104] [2021-08-21 16:39:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:39:59,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:59,392 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:59,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 16:39:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:59,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:39:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:00,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576612104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:00,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:00,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:40:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215246142] [2021-08-21 16:40:00,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:40:00,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:40:00,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:40:00,296 INFO L87 Difference]: Start difference. First operand 697 states and 924 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:00,460 INFO L93 Difference]: Finished difference Result 1091 states and 1412 transitions. [2021-08-21 16:40:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:40:00,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:00,463 INFO L225 Difference]: With dead ends: 1091 [2021-08-21 16:40:00,463 INFO L226 Difference]: Without dead ends: 941 [2021-08-21 16:40:00,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:40:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-21 16:40:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 727. [2021-08-21 16:40:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 719 states have (on average 1.3407510431154381) internal successors, (964), 726 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 964 transitions. [2021-08-21 16:40:00,475 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 964 transitions. Word has length 75 [2021-08-21 16:40:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:00,475 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 964 transitions. [2021-08-21 16:40:00,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 964 transitions. [2021-08-21 16:40:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:00,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:00,477 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:00,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:00,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:00,703 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:00,703 INFO L82 PathProgramCache]: Analyzing trace with hash 536408860, now seen corresponding path program 20 times [2021-08-21 16:40:00,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:00,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858533621] [2021-08-21 16:40:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:00,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:00,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:00,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858533621] [2021-08-21 16:40:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858533621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:00,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534432500] [2021-08-21 16:40:00,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:00,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:00,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:00,844 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:00,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 16:40:01,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:01,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:01,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:01,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534432500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:01,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:01,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-21 16:40:01,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988590048] [2021-08-21 16:40:01,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:40:01,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:40:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:40:01,956 INFO L87 Difference]: Start difference. First operand 727 states and 964 transitions. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:02,179 INFO L93 Difference]: Finished difference Result 1772 states and 2251 transitions. [2021-08-21 16:40:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:40:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:02,182 INFO L225 Difference]: With dead ends: 1772 [2021-08-21 16:40:02,182 INFO L226 Difference]: Without dead ends: 1564 [2021-08-21 16:40:02,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:40:02,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-08-21 16:40:02,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 742. [2021-08-21 16:40:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-21 16:40:02,196 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-21 16:40:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:02,196 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-21 16:40:02,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-21 16:40:02,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:02,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:02,198 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:02,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:02,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:02,422 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:02,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -884648458, now seen corresponding path program 21 times [2021-08-21 16:40:02,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:02,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765032165] [2021-08-21 16:40:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:02,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:02,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:02,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765032165] [2021-08-21 16:40:02,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765032165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:02,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033654005] [2021-08-21 16:40:02,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:02,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:02,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:02,549 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:02,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 16:40:03,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:40:03,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:03,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033654005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:03,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:03,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:40:03,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365109133] [2021-08-21 16:40:03,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:40:03,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:03,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:40:03,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:40:03,570 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:03,767 INFO L93 Difference]: Finished difference Result 1383 states and 1767 transitions. [2021-08-21 16:40:03,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:40:03,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:03,770 INFO L225 Difference]: With dead ends: 1383 [2021-08-21 16:40:03,770 INFO L226 Difference]: Without dead ends: 1233 [2021-08-21 16:40:03,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:40:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-08-21 16:40:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 742. [2021-08-21 16:40:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-21 16:40:03,781 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-21 16:40:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:03,781 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-21 16:40:03,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-21 16:40:03,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:03,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:03,783 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:03,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:03,996 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,SelfDestructingSolverStorable31 [2021-08-21 16:40:03,997 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1211040248, now seen corresponding path program 22 times [2021-08-21 16:40:03,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:03,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975133986] [2021-08-21 16:40:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:03,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:04,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:04,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975133986] [2021-08-21 16:40:04,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975133986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:04,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039856376] [2021-08-21 16:40:04,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:40:04,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:04,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:04,131 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:04,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 16:40:04,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:40:04,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:04,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:05,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039856376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:05,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:05,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:40:05,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256985400] [2021-08-21 16:40:05,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:40:05,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:40:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:40:05,234 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:05,545 INFO L93 Difference]: Finished difference Result 1618 states and 2035 transitions. [2021-08-21 16:40:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:40:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:05,548 INFO L225 Difference]: With dead ends: 1618 [2021-08-21 16:40:05,548 INFO L226 Difference]: Without dead ends: 1468 [2021-08-21 16:40:05,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:40:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-08-21 16:40:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 742. [2021-08-21 16:40:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-21 16:40:05,563 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-21 16:40:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:05,563 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-21 16:40:05,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-21 16:40:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:05,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:05,565 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:05,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:05,786 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,SelfDestructingSolverStorable32 [2021-08-21 16:40:05,787 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:05,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:05,787 INFO L82 PathProgramCache]: Analyzing trace with hash 54356090, now seen corresponding path program 23 times [2021-08-21 16:40:05,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:05,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822810656] [2021-08-21 16:40:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:05,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:05,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:05,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822810656] [2021-08-21 16:40:05,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822810656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:05,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439651240] [2021-08-21 16:40:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:40:05,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:05,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:05,917 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:05,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 16:40:06,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:40:06,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:06,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439651240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:06,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:06,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:40:06,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837732810] [2021-08-21 16:40:06,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:40:06,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:40:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:40:06,908 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:07,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:07,165 INFO L93 Difference]: Finished difference Result 1573 states and 1965 transitions. [2021-08-21 16:40:07,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:40:07,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:07,167 INFO L225 Difference]: With dead ends: 1573 [2021-08-21 16:40:07,167 INFO L226 Difference]: Without dead ends: 1423 [2021-08-21 16:40:07,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:40:07,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-08-21 16:40:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 742. [2021-08-21 16:40:07,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-21 16:40:07,179 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-21 16:40:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-21 16:40:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-21 16:40:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:07,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:07,181 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:07,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:07,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:07,395 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1784698500, now seen corresponding path program 24 times [2021-08-21 16:40:07,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:07,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616688167] [2021-08-21 16:40:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:07,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:07,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:07,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616688167] [2021-08-21 16:40:07,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616688167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:07,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318935283] [2021-08-21 16:40:07,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:40:07,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:07,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:07,524 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:07,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 16:40:08,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:40:08,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:08,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318935283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:08,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:08,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 16:40:08,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334571976] [2021-08-21 16:40:08,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 16:40:08,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 16:40:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-21 16:40:08,521 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:08,830 INFO L93 Difference]: Finished difference Result 2059 states and 2600 transitions. [2021-08-21 16:40:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:40:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:08,833 INFO L225 Difference]: With dead ends: 2059 [2021-08-21 16:40:08,833 INFO L226 Difference]: Without dead ends: 1854 [2021-08-21 16:40:08,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:40:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-21 16:40:08,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 755. [2021-08-21 16:40:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 747 states have (on average 1.3627844712182062) internal successors, (1018), 754 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1018 transitions. [2021-08-21 16:40:08,846 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1018 transitions. Word has length 75 [2021-08-21 16:40:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:08,847 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1018 transitions. [2021-08-21 16:40:08,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1018 transitions. [2021-08-21 16:40:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:08,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:08,848 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:08,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:09,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:09,066 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:09,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1741585640, now seen corresponding path program 25 times [2021-08-21 16:40:09,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:09,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304216149] [2021-08-21 16:40:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:09,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:09,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:09,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304216149] [2021-08-21 16:40:09,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304216149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:09,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081536026] [2021-08-21 16:40:09,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:40:09,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:09,197 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:09,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 16:40:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:10,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081536026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:10,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:10,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 16:40:10,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868742152] [2021-08-21 16:40:10,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:10,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:10,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:10,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:10,244 INFO L87 Difference]: Start difference. First operand 755 states and 1018 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:10,658 INFO L93 Difference]: Finished difference Result 1421 states and 1777 transitions. [2021-08-21 16:40:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:40:10,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:10,660 INFO L225 Difference]: With dead ends: 1421 [2021-08-21 16:40:10,660 INFO L226 Difference]: Without dead ends: 1298 [2021-08-21 16:40:10,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:40:10,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-08-21 16:40:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 772. [2021-08-21 16:40:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 764 states have (on average 1.350785340314136) internal successors, (1032), 771 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1032 transitions. [2021-08-21 16:40:10,672 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1032 transitions. Word has length 75 [2021-08-21 16:40:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:10,672 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1032 transitions. [2021-08-21 16:40:10,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1032 transitions. [2021-08-21 16:40:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:10,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:10,674 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:10,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:10,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:10,889 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1544234614, now seen corresponding path program 26 times [2021-08-21 16:40:10,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:10,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377749402] [2021-08-21 16:40:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:10,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:11,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:11,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377749402] [2021-08-21 16:40:11,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377749402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:11,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331464354] [2021-08-21 16:40:11,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:11,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:11,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:11,013 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:11,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 16:40:11,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:11,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:11,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:12,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331464354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:12,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:12,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 16:40:12,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903326870] [2021-08-21 16:40:12,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:40:12,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:12,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:40:12,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:40:12,138 INFO L87 Difference]: Start difference. First operand 772 states and 1032 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:12,285 INFO L93 Difference]: Finished difference Result 1541 states and 1976 transitions. [2021-08-21 16:40:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:40:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:12,287 INFO L225 Difference]: With dead ends: 1541 [2021-08-21 16:40:12,287 INFO L226 Difference]: Without dead ends: 1388 [2021-08-21 16:40:12,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:40:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-08-21 16:40:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 742. [2021-08-21 16:40:12,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3583106267029972) internal successors, (997), 741 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 997 transitions. [2021-08-21 16:40:12,296 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 997 transitions. Word has length 75 [2021-08-21 16:40:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:12,297 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 997 transitions. [2021-08-21 16:40:12,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 997 transitions. [2021-08-21 16:40:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:12,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:12,298 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:12,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 16:40:12,512 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,SelfDestructingSolverStorable36 [2021-08-21 16:40:12,513 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash -996360446, now seen corresponding path program 27 times [2021-08-21 16:40:12,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:12,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392869720] [2021-08-21 16:40:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:12,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:12,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:12,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392869720] [2021-08-21 16:40:12,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392869720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:12,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195556537] [2021-08-21 16:40:12,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:12,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:12,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:12,647 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:12,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 16:40:13,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:40:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:13,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:13,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:13,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195556537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:13,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:13,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 16:40:13,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330322239] [2021-08-21 16:40:13,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:40:13,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:13,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:40:13,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:40:13,892 INFO L87 Difference]: Start difference. First operand 742 states and 997 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:14,060 INFO L93 Difference]: Finished difference Result 1506 states and 1921 transitions. [2021-08-21 16:40:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:40:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:14,062 INFO L225 Difference]: With dead ends: 1506 [2021-08-21 16:40:14,062 INFO L226 Difference]: Without dead ends: 1353 [2021-08-21 16:40:14,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-08-21 16:40:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-08-21 16:40:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 712. [2021-08-21 16:40:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 704 states have (on average 1.359375) internal successors, (957), 711 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 957 transitions. [2021-08-21 16:40:14,072 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 957 transitions. Word has length 75 [2021-08-21 16:40:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:14,072 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 957 transitions. [2021-08-21 16:40:14,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 957 transitions. [2021-08-21 16:40:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:14,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:14,074 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:14,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:14,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 16:40:14,287 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1368122944, now seen corresponding path program 28 times [2021-08-21 16:40:14,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:14,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198448045] [2021-08-21 16:40:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:14,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:14,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:14,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198448045] [2021-08-21 16:40:14,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198448045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:14,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113744889] [2021-08-21 16:40:14,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:40:14,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:14,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:14,393 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:14,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 16:40:15,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:40:15,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:15,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113744889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:15,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:15,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 16:40:15,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477131755] [2021-08-21 16:40:15,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:40:15,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:15,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:40:15,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:40:15,610 INFO L87 Difference]: Start difference. First operand 712 states and 957 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:15,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:15,843 INFO L93 Difference]: Finished difference Result 1436 states and 1821 transitions. [2021-08-21 16:40:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:40:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:15,845 INFO L225 Difference]: With dead ends: 1436 [2021-08-21 16:40:15,845 INFO L226 Difference]: Without dead ends: 1283 [2021-08-21 16:40:15,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:40:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-08-21 16:40:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 682. [2021-08-21 16:40:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 674 states have (on average 1.36053412462908) internal successors, (917), 681 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 917 transitions. [2021-08-21 16:40:15,854 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 917 transitions. Word has length 75 [2021-08-21 16:40:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:15,855 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 917 transitions. [2021-08-21 16:40:15,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 917 transitions. [2021-08-21 16:40:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:15,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:15,856 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:15,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 16:40:16,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 16:40:16,068 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:16,068 INFO L82 PathProgramCache]: Analyzing trace with hash 935078398, now seen corresponding path program 29 times [2021-08-21 16:40:16,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:16,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422406413] [2021-08-21 16:40:16,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:16,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:16,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:16,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422406413] [2021-08-21 16:40:16,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422406413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:16,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761553229] [2021-08-21 16:40:16,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:40:16,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:16,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:16,190 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:16,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 16:40:17,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:40:17,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 16:40:17,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761553229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:17,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:17,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 16:40:17,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363898703] [2021-08-21 16:40:17,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:40:17,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:40:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:40:17,394 INFO L87 Difference]: Start difference. First operand 682 states and 917 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:17,621 INFO L93 Difference]: Finished difference Result 1832 states and 2334 transitions. [2021-08-21 16:40:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:40:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:17,625 INFO L225 Difference]: With dead ends: 1832 [2021-08-21 16:40:17,625 INFO L226 Difference]: Without dead ends: 1664 [2021-08-21 16:40:17,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:40:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-08-21 16:40:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 650. [2021-08-21 16:40:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 642 states have (on average 1.381619937694704) internal successors, (887), 649 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 887 transitions. [2021-08-21 16:40:17,637 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 887 transitions. Word has length 75 [2021-08-21 16:40:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:17,637 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 887 transitions. [2021-08-21 16:40:17,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 887 transitions. [2021-08-21 16:40:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-21 16:40:17,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:17,638 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:17,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:17,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 16:40:17,853 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:17,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1577214803, now seen corresponding path program 30 times [2021-08-21 16:40:17,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:17,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227566617] [2021-08-21 16:40:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:17,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:17,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:17,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227566617] [2021-08-21 16:40:17,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227566617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:17,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550850484] [2021-08-21 16:40:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:40:17,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:17,965 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:17,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 16:40:18,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:40:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:40:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:19,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550850484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:19,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:19,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-21 16:40:19,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346060433] [2021-08-21 16:40:19,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:19,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:19,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:19,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:19,159 INFO L87 Difference]: Start difference. First operand 650 states and 887 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:19,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:19,466 INFO L93 Difference]: Finished difference Result 1282 states and 1612 transitions. [2021-08-21 16:40:19,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:40:19,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-21 16:40:19,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:19,468 INFO L225 Difference]: With dead ends: 1282 [2021-08-21 16:40:19,468 INFO L226 Difference]: Without dead ends: 1159 [2021-08-21 16:40:19,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 16:40:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-08-21 16:40:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 542. [2021-08-21 16:40:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 534 states have (on average 1.3595505617977528) internal successors, (726), 541 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-08-21 16:40:19,476 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 75 [2021-08-21 16:40:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-08-21 16:40:19,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-08-21 16:40:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:19,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:19,477 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:19,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 16:40:19,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:19,693 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:19,693 INFO L82 PathProgramCache]: Analyzing trace with hash -634211792, now seen corresponding path program 31 times [2021-08-21 16:40:19,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:19,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238003187] [2021-08-21 16:40:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:19,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:19,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238003187] [2021-08-21 16:40:19,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238003187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908865539] [2021-08-21 16:40:19,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:40:19,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:19,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:19,868 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:19,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 16:40:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:20,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 16:40:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:21,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908865539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:21,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:21,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-21 16:40:21,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683787836] [2021-08-21 16:40:21,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:40:21,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:40:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:40:21,286 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:21,492 INFO L93 Difference]: Finished difference Result 1032 states and 1325 transitions. [2021-08-21 16:40:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:40:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:21,494 INFO L225 Difference]: With dead ends: 1032 [2021-08-21 16:40:21,494 INFO L226 Difference]: Without dead ends: 882 [2021-08-21 16:40:21,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-08-21 16:40:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-08-21 16:40:21,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 587. [2021-08-21 16:40:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 579 states have (on average 1.3661485319516407) internal successors, (791), 586 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 791 transitions. [2021-08-21 16:40:21,502 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 791 transitions. Word has length 80 [2021-08-21 16:40:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:21,503 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 791 transitions. [2021-08-21 16:40:21,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:21,503 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 791 transitions. [2021-08-21 16:40:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:21,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:21,504 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:21,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:21,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 16:40:21,729 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -98793706, now seen corresponding path program 32 times [2021-08-21 16:40:21,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:21,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327923283] [2021-08-21 16:40:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:21,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:21,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327923283] [2021-08-21 16:40:21,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327923283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:21,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496662013] [2021-08-21 16:40:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:21,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:21,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:21,899 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:21,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 16:40:22,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:22,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:40:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:23,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496662013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:23,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:23,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 16:40:23,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565651319] [2021-08-21 16:40:23,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:23,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:23,326 INFO L87 Difference]: Start difference. First operand 587 states and 791 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:23,540 INFO L93 Difference]: Finished difference Result 1548 states and 1960 transitions. [2021-08-21 16:40:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:40:23,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:23,543 INFO L225 Difference]: With dead ends: 1548 [2021-08-21 16:40:23,543 INFO L226 Difference]: Without dead ends: 1398 [2021-08-21 16:40:23,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:40:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-08-21 16:40:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 587. [2021-08-21 16:40:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 579 states have (on average 1.3696027633851469) internal successors, (793), 586 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 793 transitions. [2021-08-21 16:40:23,555 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 793 transitions. Word has length 80 [2021-08-21 16:40:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:23,556 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 793 transitions. [2021-08-21 16:40:23,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 793 transitions. [2021-08-21 16:40:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:23,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:23,558 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:23,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:23,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:23,781 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1817156086, now seen corresponding path program 33 times [2021-08-21 16:40:23,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:23,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513923542] [2021-08-21 16:40:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:23,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:23,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:23,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513923542] [2021-08-21 16:40:23,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513923542] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:23,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042514496] [2021-08-21 16:40:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:23,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:23,934 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 16:40:25,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:40:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:25,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:40:25,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:25,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042514496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:25,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:25,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 16:40:25,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903898690] [2021-08-21 16:40:25,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:25,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:25,341 INFO L87 Difference]: Start difference. First operand 587 states and 793 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:25,540 INFO L93 Difference]: Finished difference Result 1543 states and 1947 transitions. [2021-08-21 16:40:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:40:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:25,543 INFO L225 Difference]: With dead ends: 1543 [2021-08-21 16:40:25,543 INFO L226 Difference]: Without dead ends: 1393 [2021-08-21 16:40:25,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:40:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-08-21 16:40:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 617. [2021-08-21 16:40:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 609 states have (on average 1.3711001642036125) internal successors, (835), 616 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 835 transitions. [2021-08-21 16:40:25,553 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 835 transitions. Word has length 80 [2021-08-21 16:40:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:25,554 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 835 transitions. [2021-08-21 16:40:25,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 835 transitions. [2021-08-21 16:40:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:25,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:25,555 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:25,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:25,774 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash 278532620, now seen corresponding path program 34 times [2021-08-21 16:40:25,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:25,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911129983] [2021-08-21 16:40:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:25,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:25,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:25,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911129983] [2021-08-21 16:40:25,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911129983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:25,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072878345] [2021-08-21 16:40:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:40:25,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:25,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:25,900 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:25,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 16:40:27,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:40:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:40:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:27,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072878345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:27,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:27,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 16:40:27,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672470227] [2021-08-21 16:40:27,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:27,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:27,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:27,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:27,330 INFO L87 Difference]: Start difference. First operand 617 states and 835 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:27,593 INFO L93 Difference]: Finished difference Result 1533 states and 1929 transitions. [2021-08-21 16:40:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:40:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:27,596 INFO L225 Difference]: With dead ends: 1533 [2021-08-21 16:40:27,596 INFO L226 Difference]: Without dead ends: 1383 [2021-08-21 16:40:27,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-21 16:40:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-08-21 16:40:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 647. [2021-08-21 16:40:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 639 states have (on average 1.3724569640062598) internal successors, (877), 646 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 877 transitions. [2021-08-21 16:40:27,607 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 877 transitions. Word has length 80 [2021-08-21 16:40:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:27,607 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 877 transitions. [2021-08-21 16:40:27,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 877 transitions. [2021-08-21 16:40:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:27,608 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:27,609 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:27,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:27,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 16:40:27,825 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash -878151538, now seen corresponding path program 35 times [2021-08-21 16:40:27,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:27,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043026516] [2021-08-21 16:40:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:27,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:27,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:27,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043026516] [2021-08-21 16:40:27,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043026516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:27,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149415000] [2021-08-21 16:40:27,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:40:27,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:27,961 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:27,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 16:40:29,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:40:29,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:29,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:40:29,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:29,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149415000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:29,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:29,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 16:40:29,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039300985] [2021-08-21 16:40:29,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:29,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:29,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:29,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:29,474 INFO L87 Difference]: Start difference. First operand 647 states and 877 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:29,734 INFO L93 Difference]: Finished difference Result 1523 states and 1911 transitions. [2021-08-21 16:40:29,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:40:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:29,736 INFO L225 Difference]: With dead ends: 1523 [2021-08-21 16:40:29,736 INFO L226 Difference]: Without dead ends: 1373 [2021-08-21 16:40:29,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 16:40:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-08-21 16:40:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 677. [2021-08-21 16:40:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 669 states have (on average 1.3736920777279522) internal successors, (919), 676 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:29,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 919 transitions. [2021-08-21 16:40:29,746 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 919 transitions. Word has length 80 [2021-08-21 16:40:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:29,746 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 919 transitions. [2021-08-21 16:40:29,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 919 transitions. [2021-08-21 16:40:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:29,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:29,747 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:29,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:29,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 16:40:29,949 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1577761168, now seen corresponding path program 36 times [2021-08-21 16:40:29,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:29,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851061999] [2021-08-21 16:40:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:29,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:30,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851061999] [2021-08-21 16:40:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851061999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:30,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426243349] [2021-08-21 16:40:30,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:40:30,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:30,080 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:30,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 16:40:31,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:40:31,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:40:31,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:31,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426243349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:31,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 16:40:31,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391245965] [2021-08-21 16:40:31,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:40:31,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:31,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:40:31,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:31,514 INFO L87 Difference]: Start difference. First operand 677 states and 919 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:31,810 INFO L93 Difference]: Finished difference Result 1985 states and 2501 transitions. [2021-08-21 16:40:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:40:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:31,813 INFO L225 Difference]: With dead ends: 1985 [2021-08-21 16:40:31,813 INFO L226 Difference]: Without dead ends: 1823 [2021-08-21 16:40:31,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:40:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-08-21 16:40:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 710. [2021-08-21 16:40:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 702 states have (on average 1.3846153846153846) internal successors, (972), 709 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 972 transitions. [2021-08-21 16:40:31,826 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 972 transitions. Word has length 80 [2021-08-21 16:40:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:31,827 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 972 transitions. [2021-08-21 16:40:31,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 972 transitions. [2021-08-21 16:40:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-21 16:40:31,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:31,828 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:31,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:32,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 16:40:32,041 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:32,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:32,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1620874028, now seen corresponding path program 37 times [2021-08-21 16:40:32,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:32,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833984040] [2021-08-21 16:40:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:32,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:32,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:32,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833984040] [2021-08-21 16:40:32,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833984040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:32,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064456087] [2021-08-21 16:40:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:40:32,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:32,161 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:32,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 16:40:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 16:40:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:33,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064456087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:33,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:33,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-21 16:40:33,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322532926] [2021-08-21 16:40:33,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:40:33,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:33,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:40:33,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:40:33,714 INFO L87 Difference]: Start difference. First operand 710 states and 972 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:34,124 INFO L93 Difference]: Finished difference Result 1411 states and 1770 transitions. [2021-08-21 16:40:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:40:34,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-21 16:40:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:34,126 INFO L225 Difference]: With dead ends: 1411 [2021-08-21 16:40:34,126 INFO L226 Difference]: Without dead ends: 1288 [2021-08-21 16:40:34,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 16:40:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-21 16:40:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 702. [2021-08-21 16:40:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 694 states have (on average 1.3703170028818443) internal successors, (951), 701 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 951 transitions. [2021-08-21 16:40:34,137 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 951 transitions. Word has length 80 [2021-08-21 16:40:34,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:34,137 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 951 transitions. [2021-08-21 16:40:34,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 951 transitions. [2021-08-21 16:40:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:40:34,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:34,138 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:34,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:34,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 16:40:34,357 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1691728315, now seen corresponding path program 38 times [2021-08-21 16:40:34,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:34,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728885694] [2021-08-21 16:40:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:34,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:34,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:34,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728885694] [2021-08-21 16:40:34,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728885694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:34,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513677627] [2021-08-21 16:40:34,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:34,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:34,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:34,466 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:34,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 16:40:35,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:35,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:35,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:40:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513677627] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:40:35,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 16:40:35,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-21 16:40:35,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052464377] [2021-08-21 16:40:35,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:40:35,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:40:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:36,000 INFO L87 Difference]: Start difference. First operand 702 states and 951 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:36,103 INFO L93 Difference]: Finished difference Result 1783 states and 2297 transitions. [2021-08-21 16:40:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:40:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-21 16:40:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:36,104 INFO L225 Difference]: With dead ends: 1783 [2021-08-21 16:40:36,104 INFO L226 Difference]: Without dead ends: 258 [2021-08-21 16:40:36,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:40:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-21 16:40:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-08-21 16:40:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 250 states have (on average 1.232) internal successors, (308), 257 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2021-08-21 16:40:36,107 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 85 [2021-08-21 16:40:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:36,107 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2021-08-21 16:40:36,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2021-08-21 16:40:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 16:40:36,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:36,107 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:36,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:36,308 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash -680745668, now seen corresponding path program 39 times [2021-08-21 16:40:36,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:36,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025331033] [2021-08-21 16:40:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:36,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:36,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:36,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025331033] [2021-08-21 16:40:36,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025331033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:36,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100262226] [2021-08-21 16:40:36,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:36,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:36,426 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:36,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 16:40:37,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 16:40:37,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:40:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:37,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100262226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:40:37,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-21 16:40:37,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-21 16:40:37,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202593089] [2021-08-21 16:40:37,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:40:37,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:37,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:40:37,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:40:37,922 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:38,065 INFO L93 Difference]: Finished difference Result 428 states and 488 transitions. [2021-08-21 16:40:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:40:38,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-21 16:40:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:38,066 INFO L225 Difference]: With dead ends: 428 [2021-08-21 16:40:38,066 INFO L226 Difference]: Without dead ends: 0 [2021-08-21 16:40:38,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:40:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-21 16:40:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-21 16:40:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-21 16:40:38,067 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-08-21 16:40:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:38,067 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-21 16:40:38,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-21 16:40:38,067 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-21 16:40:38,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-21 16:40:38,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 16:40:38,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 16:40:38,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:38,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 16:40:38,288 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 16:40:38,288 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 16:40:38,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:40:38 BasicIcfg [2021-08-21 16:40:38,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 16:40:38,290 INFO L168 Benchmark]: Toolchain (without parser) took 66782.78 ms. Allocated memory was 189.8 MB in the beginning and 685.8 MB in the end (delta: 496.0 MB). Free memory was 152.6 MB in the beginning and 633.8 MB in the end (delta: -481.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2021-08-21 16:40:38,291 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 189.8 MB. Free memory was 170.8 MB in the beginning and 170.7 MB in the end (delta: 84.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 16:40:38,291 INFO L168 Benchmark]: CACSL2BoogieTranslator took 464.12 ms. Allocated memory is still 189.8 MB. Free memory was 152.4 MB in the beginning and 163.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 16:40:38,291 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.25 ms. Allocated memory is still 189.8 MB. Free memory was 163.0 MB in the beginning and 160.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 16:40:38,291 INFO L168 Benchmark]: Boogie Preprocessor took 31.38 ms. Allocated memory is still 189.8 MB. Free memory was 160.9 MB in the beginning and 159.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 16:40:38,291 INFO L168 Benchmark]: RCFGBuilder took 461.29 ms. Allocated memory is still 189.8 MB. Free memory was 159.3 MB in the beginning and 137.8 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-21 16:40:38,292 INFO L168 Benchmark]: TraceAbstraction took 65766.20 ms. Allocated memory was 189.8 MB in the beginning and 685.8 MB in the end (delta: 496.0 MB). Free memory was 137.3 MB in the beginning and 633.8 MB in the end (delta: -496.5 MB). Peak memory consumption was 565.8 kB. Max. memory is 8.0 GB. [2021-08-21 16:40:38,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 189.8 MB. Free memory was 170.8 MB in the beginning and 170.7 MB in the end (delta: 84.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 464.12 ms. Allocated memory is still 189.8 MB. Free memory was 152.4 MB in the beginning and 163.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.25 ms. Allocated memory is still 189.8 MB. Free memory was 163.0 MB in the beginning and 160.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.38 ms. Allocated memory is still 189.8 MB. Free memory was 160.9 MB in the beginning and 159.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 461.29 ms. Allocated memory is still 189.8 MB. Free memory was 159.3 MB in the beginning and 137.8 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 65766.20 ms. Allocated memory was 189.8 MB in the beginning and 685.8 MB in the end (delta: 496.0 MB). Free memory was 137.3 MB in the beginning and 633.8 MB in the end (delta: -496.5 MB). Peak memory consumption was 565.8 kB. 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: 10, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 10, negative conditional: 0, negative unconditional: 10, 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 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 65645.1ms, OverallIterations: 50, TraceHistogramMax: 6, EmptinessCheckTime: 78.0ms, AutomataDifference: 10213.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 197.2ms, PartialOrderReductionTime: 170.3ms, HoareTripleCheckerStatistics: 4005 SDtfs, 14489 SDslu, 23075 SDs, 0 SdLazy, 4795 SolverSat, 1820 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2570.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4053 GetRequests, 2914 SyntacticMatches, 0 SemanticMatches, 1139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5996 ImplicationChecksByTransitivity, 8799.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=780occurred in iteration=0, InterpolantAutomatonStates: 956, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 591.5ms AutomataMinimizationTime, 50 MinimizatonAttempts, 25139 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 472.8ms SsaConstructionTime, 1227.8ms SatisfiabilityAnalysisTime, 16049.1ms InterpolantComputationTime, 6064 NumberOfCodeBlocks, 6064 NumberOfCodeBlocksAsserted, 168 NumberOfCheckSat, 5971 ConstructedInterpolants, 0 QuantifiedInterpolants, 23569 SizeOfPredicates, 353 NumberOfNonLiveVariables, 6962 ConjunctsInSsa, 562 ConjunctsInUnsatCore, 93 InterpolantComputations, 9 PerfectInterpolantSequences, 461/3664 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-21 16:40:38,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...