/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/fib_bench-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 18:32:44,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 18:32:44,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 18:32:44,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 18:32:44,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 18:32:44,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 18:32:44,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 18:32:44,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 18:32:44,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 18:32:44,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 18:32:44,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 18:32:44,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 18:32:44,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 18:32:44,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 18:32:44,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 18:32:44,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 18:32:44,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 18:32:44,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 18:32:44,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 18:32:44,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 18:32:44,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 18:32:44,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 18:32:44,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 18:32:44,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 18:32:44,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 18:32:44,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 18:32:44,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 18:32:44,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 18:32:44,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 18:32:44,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 18:32:44,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 18:32:44,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 18:32:44,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 18:32:44,142 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 18:32:44,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 18:32:44,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 18:32:44,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 18:32:44,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 18:32:44,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 18:32:44,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 18:32:44,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 18:32:44,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 18:32:44,144 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 18:32:44,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 18:32:44,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 18:32:44,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 18:32:44,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 18:32:44,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 18:32:44,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 18:32:44,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 18:32:44,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:32:44,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 18:32:44,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 18:32:44,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 18:32:44,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 18:32:44,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 18:32:44,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 18:32:44,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 18:32:44,147 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 18:32:44,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 18:32:44,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 18:32:44,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 18:32:44,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 18:32:44,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 18:32:44,496 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 18:32:44,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2021-08-06 18:32:44,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b7823997/3c195907075548d1a6ee1449c2c6abf5/FLAG21d74b3b9 [2021-08-06 18:32:45,229 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 18:32:45,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i [2021-08-06 18:32:45,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b7823997/3c195907075548d1a6ee1449c2c6abf5/FLAG21d74b3b9 [2021-08-06 18:32:45,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b7823997/3c195907075548d1a6ee1449c2c6abf5 [2021-08-06 18:32:45,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 18:32:45,459 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 18:32:45,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 18:32:45,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 18:32:45,465 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 18:32:45,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e9fbf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45, skipping insertion in model container [2021-08-06 18:32:45,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 18:32:45,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 18:32:45,783 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-08-06 18:32:45,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:32:45,795 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 18:32:45,839 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-2.i[30922,30935] [2021-08-06 18:32:45,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:32:45,900 INFO L208 MainTranslator]: Completed translation [2021-08-06 18:32:45,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45 WrapperNode [2021-08-06 18:32:45,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 18:32:45,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 18:32:45,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 18:32:45,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 18:32:45,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,966 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 18:32:45,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 18:32:45,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 18:32:45,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 18:32:45,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:45,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:46,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 18:32:46,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 18:32:46,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 18:32:46,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 18:32:46,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (1/1) ... [2021-08-06 18:32:46,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:32:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:46,034 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 18:32:46,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 18:32:46,084 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-06 18:32:46,084 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-06 18:32:46,085 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-06 18:32:46,086 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-06 18:32:46,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 18:32:46,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 18:32:46,088 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 18:32:46,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 18:32:46,451 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-06 18:32:46,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:32:46 BoogieIcfgContainer [2021-08-06 18:32:46,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 18:32:46,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 18:32:46,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 18:32:46,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 18:32:46,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 06:32:45" (1/3) ... [2021-08-06 18:32:46,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b54c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:32:46, skipping insertion in model container [2021-08-06 18:32:46,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:32:45" (2/3) ... [2021-08-06 18:32:46,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b54c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:32:46, skipping insertion in model container [2021-08-06 18:32:46,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:32:46" (3/3) ... [2021-08-06 18:32:46,459 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2021-08-06 18:32:46,463 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 18:32:46,463 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 18:32:46,464 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 18:32:46,464 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 18:32:46,487 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,488 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,489 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,490 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,490 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,491 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,492 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,492 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,492 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,492 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,493 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,494 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,495 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,495 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,496 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,496 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,507 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,507 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:32:46,509 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-06 18:32:46,547 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 18:32:46,552 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 18:32:46,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 18:32:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 932 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 18:32:46,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:46,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:32:46,764 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:46,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1934908895, now seen corresponding path program 1 times [2021-08-06 18:32:46,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:46,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587645865] [2021-08-06 18:32:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:46,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:47,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:32:47,093 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:32:47,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:47,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:47,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:47,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:47,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:47,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587645865] [2021-08-06 18:32:47,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587645865] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:47,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:47,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:32:47,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358602604] [2021-08-06 18:32:47,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:32:47,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:32:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:32:47,239 INFO L87 Difference]: Start difference. First operand has 933 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 932 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:47,437 INFO L93 Difference]: Finished difference Result 1756 states and 2036 transitions. [2021-08-06 18:32:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 18:32:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 18:32:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:47,464 INFO L225 Difference]: With dead ends: 1756 [2021-08-06 18:32:47,464 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 18:32:47,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:32:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 18:32:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 434. [2021-08-06 18:32:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 423 states have (on average 1.3144208037825058) internal successors, (556), 433 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 556 transitions. [2021-08-06 18:32:47,561 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 556 transitions. Word has length 32 [2021-08-06 18:32:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:47,562 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 556 transitions. [2021-08-06 18:32:47,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,562 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 556 transitions. [2021-08-06 18:32:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 18:32:47,563 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:47,563 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] [2021-08-06 18:32:47,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 18:32:47,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:47,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1277645863, now seen corresponding path program 1 times [2021-08-06 18:32:47,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:47,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110273009] [2021-08-06 18:32:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:47,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:47,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:47,716 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:47,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:47,771 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:47,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110273009] [2021-08-06 18:32:47,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110273009] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:47,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:47,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:32:47,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904634665] [2021-08-06 18:32:47,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:32:47,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:32:47,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:32:47,828 INFO L87 Difference]: Start difference. First operand 434 states and 556 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:47,998 INFO L93 Difference]: Finished difference Result 859 states and 1082 transitions. [2021-08-06 18:32:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:32:48,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 18:32:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:48,010 INFO L225 Difference]: With dead ends: 859 [2021-08-06 18:32:48,010 INFO L226 Difference]: Without dead ends: 699 [2021-08-06 18:32:48,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:32:48,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-08-06 18:32:48,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 476. [2021-08-06 18:32:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 465 states have (on average 1.313978494623656) internal successors, (611), 475 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2021-08-06 18:32:48,047 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 37 [2021-08-06 18:32:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:48,047 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2021-08-06 18:32:48,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2021-08-06 18:32:48,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 18:32:48,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:48,049 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] [2021-08-06 18:32:48,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 18:32:48,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:48,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:48,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1626203799, now seen corresponding path program 1 times [2021-08-06 18:32:48,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:48,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955585288] [2021-08-06 18:32:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:48,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:48,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:48,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:48,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 81.3 percent of original size [2021-08-06 18:32:48,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 81.3 percent of original size [2021-08-06 18:32:48,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:48,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:48,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:48,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955585288] [2021-08-06 18:32:48,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955585288] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:48,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:48,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:32:48,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302949542] [2021-08-06 18:32:48,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:32:48,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:32:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:32:48,233 INFO L87 Difference]: Start difference. First operand 476 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:48,363 INFO L93 Difference]: Finished difference Result 846 states and 1079 transitions. [2021-08-06 18:32:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:32:48,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 18:32:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:48,367 INFO L225 Difference]: With dead ends: 846 [2021-08-06 18:32:48,368 INFO L226 Difference]: Without dead ends: 726 [2021-08-06 18:32:48,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:32:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-08-06 18:32:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 479. [2021-08-06 18:32:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 468 states have (on average 1.3205128205128205) internal successors, (618), 478 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 618 transitions. [2021-08-06 18:32:48,400 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 618 transitions. Word has length 37 [2021-08-06 18:32:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:48,400 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 618 transitions. [2021-08-06 18:32:48,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 618 transitions. [2021-08-06 18:32:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:48,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:48,408 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] [2021-08-06 18:32:48,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 18:32:48,408 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash 683883480, now seen corresponding path program 1 times [2021-08-06 18:32:48,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:48,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227340554] [2021-08-06 18:32:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:48,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:48,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:48,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:48,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:48,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:32:48,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:48,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:48,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:48,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227340554] [2021-08-06 18:32:48,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227340554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:48,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448240309] [2021-08-06 18:32:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:48,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:48,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:48,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 18:32:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:32:48,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:49,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:49,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:49,499 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:49,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:49,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448240309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:49,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:49,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 18:32:49,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600687904] [2021-08-06 18:32:49,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:32:49,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:32:49,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:32:49,511 INFO L87 Difference]: Start difference. First operand 479 states and 618 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) [2021-08-06 18:32:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:49,695 INFO L93 Difference]: Finished difference Result 1073 states and 1359 transitions. [2021-08-06 18:32:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:32:49,696 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 42 [2021-08-06 18:32:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:49,699 INFO L225 Difference]: With dead ends: 1073 [2021-08-06 18:32:49,700 INFO L226 Difference]: Without dead ends: 833 [2021-08-06 18:32:49,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:32:49,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-08-06 18:32:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 559. [2021-08-06 18:32:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 548 states have (on average 1.2919708029197081) internal successors, (708), 558 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 708 transitions. [2021-08-06 18:32:49,714 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 708 transitions. Word has length 42 [2021-08-06 18:32:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:49,714 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 708 transitions. [2021-08-06 18:32:49,714 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) [2021-08-06 18:32:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 708 transitions. [2021-08-06 18:32:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:49,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:49,715 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:32:49,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:49,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:49,929 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1433533419, now seen corresponding path program 1 times [2021-08-06 18:32:49,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:49,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650830857] [2021-08-06 18:32:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:49,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:50,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:50,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:50,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:50,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:50,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:50,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650830857] [2021-08-06 18:32:50,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650830857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:50,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:50,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:32:50,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71074555] [2021-08-06 18:32:50,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:32:50,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:32:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:32:50,080 INFO L87 Difference]: Start difference. First operand 559 states and 708 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:50,152 INFO L93 Difference]: Finished difference Result 889 states and 1136 transitions. [2021-08-06 18:32:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 18:32:50,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:50,156 INFO L225 Difference]: With dead ends: 889 [2021-08-06 18:32:50,156 INFO L226 Difference]: Without dead ends: 809 [2021-08-06 18:32:50,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:32:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-08-06 18:32:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 589. [2021-08-06 18:32:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 578 states have (on average 1.2906574394463668) internal successors, (746), 588 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 746 transitions. [2021-08-06 18:32:50,172 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 746 transitions. Word has length 42 [2021-08-06 18:32:50,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:50,172 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 746 transitions. [2021-08-06 18:32:50,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 746 transitions. [2021-08-06 18:32:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:50,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:50,173 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] [2021-08-06 18:32:50,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 18:32:50,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:50,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:50,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1916570634, now seen corresponding path program 1 times [2021-08-06 18:32:50,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:50,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286363286] [2021-08-06 18:32:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:50,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:50,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:50,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:32:50,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:32:50,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:32:50,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:32:50,309 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:50,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:50,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:50,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286363286] [2021-08-06 18:32:50,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286363286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:50,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194627882] [2021-08-06 18:32:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:50,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:50,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:50,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:50,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 18:32:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:32:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:50,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:50,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:50,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:50,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:50,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194627882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:50,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:50,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 18:32:50,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946861492] [2021-08-06 18:32:50,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:32:50,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:32:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:32:50,974 INFO L87 Difference]: Start difference. First operand 589 states and 746 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) [2021-08-06 18:32:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:51,171 INFO L93 Difference]: Finished difference Result 1141 states and 1435 transitions. [2021-08-06 18:32:51,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:32:51,171 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 42 [2021-08-06 18:32:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:51,175 INFO L225 Difference]: With dead ends: 1141 [2021-08-06 18:32:51,175 INFO L226 Difference]: Without dead ends: 981 [2021-08-06 18:32:51,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:32:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-08-06 18:32:51,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 599. [2021-08-06 18:32:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 588 states have (on average 1.3061224489795917) internal successors, (768), 598 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 768 transitions. [2021-08-06 18:32:51,190 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 768 transitions. Word has length 42 [2021-08-06 18:32:51,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:51,190 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 768 transitions. [2021-08-06 18:32:51,190 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) [2021-08-06 18:32:51,191 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 768 transitions. [2021-08-06 18:32:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:51,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:51,192 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:32:51,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:51,408 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,SelfDestructingSolverStorable5 [2021-08-06 18:32:51,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 196919587, now seen corresponding path program 2 times [2021-08-06 18:32:51,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:51,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767978766] [2021-08-06 18:32:51,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:51,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:51,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:51,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:51,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 18:32:51,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 65.2 percent of original size [2021-08-06 18:32:51,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:51,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:51,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:51,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767978766] [2021-08-06 18:32:51,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767978766] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:51,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:51,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:32:51,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705724196] [2021-08-06 18:32:51,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:32:51,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:32:51,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:32:51,533 INFO L87 Difference]: Start difference. First operand 599 states and 768 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:51,613 INFO L93 Difference]: Finished difference Result 959 states and 1226 transitions. [2021-08-06 18:32:51,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:32:51,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:51,617 INFO L225 Difference]: With dead ends: 959 [2021-08-06 18:32:51,617 INFO L226 Difference]: Without dead ends: 879 [2021-08-06 18:32:51,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:32:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-08-06 18:32:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 599. [2021-08-06 18:32:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 588 states have (on average 1.3061224489795917) internal successors, (768), 598 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 768 transitions. [2021-08-06 18:32:51,631 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 768 transitions. Word has length 42 [2021-08-06 18:32:51,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:51,632 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 768 transitions. [2021-08-06 18:32:51,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 768 transitions. [2021-08-06 18:32:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 18:32:51,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:51,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:32:51,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 18:32:51,633 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:51,633 INFO L82 PathProgramCache]: Analyzing trace with hash 444814061, now seen corresponding path program 3 times [2021-08-06 18:32:51,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:51,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517678612] [2021-08-06 18:32:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:51,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:51,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:51,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 50.0 percent of original size [2021-08-06 18:32:51,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:51,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:32:51,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:51,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:51,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:51,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517678612] [2021-08-06 18:32:51,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517678612] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:32:51,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:32:51,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:32:51,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746758319] [2021-08-06 18:32:51,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:32:51,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:32:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:32:51,774 INFO L87 Difference]: Start difference. First operand 599 states and 768 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:51,915 INFO L93 Difference]: Finished difference Result 1076 states and 1383 transitions. [2021-08-06 18:32:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:32:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 18:32:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:51,919 INFO L225 Difference]: With dead ends: 1076 [2021-08-06 18:32:51,919 INFO L226 Difference]: Without dead ends: 956 [2021-08-06 18:32:51,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:32:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-06 18:32:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 614. [2021-08-06 18:32:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 603 states have (on average 1.3051409618573797) internal successors, (787), 613 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 787 transitions. [2021-08-06 18:32:51,934 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 787 transitions. Word has length 42 [2021-08-06 18:32:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:51,934 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 787 transitions. [2021-08-06 18:32:51,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:51,934 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 787 transitions. [2021-08-06 18:32:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:51,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:51,935 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, 1, 1] [2021-08-06 18:32:51,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 18:32:51,936 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:51,936 INFO L82 PathProgramCache]: Analyzing trace with hash 297190658, now seen corresponding path program 1 times [2021-08-06 18:32:51,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:51,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373366197] [2021-08-06 18:32:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:51,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:51,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:51,994 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:52,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:52,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:52,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:52,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373366197] [2021-08-06 18:32:52,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373366197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:52,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132300512] [2021-08-06 18:32:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:52,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:52,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:52,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 18:32:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:52,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:32:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:52,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:52,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:52,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:52,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:52,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132300512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:52,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:52,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 18:32:52,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365982118] [2021-08-06 18:32:52,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:32:52,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:32:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:32:52,854 INFO L87 Difference]: Start difference. First operand 614 states and 787 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) [2021-08-06 18:32:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:52,954 INFO L93 Difference]: Finished difference Result 1026 states and 1313 transitions. [2021-08-06 18:32:52,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:32:52,954 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 47 [2021-08-06 18:32:52,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:52,957 INFO L225 Difference]: With dead ends: 1026 [2021-08-06 18:32:52,958 INFO L226 Difference]: Without dead ends: 946 [2021-08-06 18:32:52,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:32:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-08-06 18:32:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 619. [2021-08-06 18:32:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 608 states have (on average 1.3125) internal successors, (798), 618 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 798 transitions. [2021-08-06 18:32:52,972 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 798 transitions. Word has length 47 [2021-08-06 18:32:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:52,972 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 798 transitions. [2021-08-06 18:32:52,972 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) [2021-08-06 18:32:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 798 transitions. [2021-08-06 18:32:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:52,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:52,975 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, 1, 1] [2021-08-06 18:32:52,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:53,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:53,183 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:53,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1408784100, now seen corresponding path program 1 times [2021-08-06 18:32:53,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:53,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252034104] [2021-08-06 18:32:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:53,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:53,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:53,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:53,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:53,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:53,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:53,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252034104] [2021-08-06 18:32:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252034104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:53,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678867625] [2021-08-06 18:32:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:53,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:53,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:53,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:53,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 18:32:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:32:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:53,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:53,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:54,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:54,124 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:54,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678867625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:54,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:54,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 18:32:54,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228752202] [2021-08-06 18:32:54,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:32:54,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:54,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:32:54,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:32:54,131 INFO L87 Difference]: Start difference. First operand 619 states and 798 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) [2021-08-06 18:32:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:54,345 INFO L93 Difference]: Finished difference Result 1298 states and 1640 transitions. [2021-08-06 18:32:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:32:54,346 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 47 [2021-08-06 18:32:54,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:54,350 INFO L225 Difference]: With dead ends: 1298 [2021-08-06 18:32:54,350 INFO L226 Difference]: Without dead ends: 1098 [2021-08-06 18:32:54,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:32:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-06 18:32:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 693. [2021-08-06 18:32:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 682 states have (on average 1.2932551319648093) internal successors, (882), 692 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 882 transitions. [2021-08-06 18:32:54,365 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 882 transitions. Word has length 47 [2021-08-06 18:32:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:54,365 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 882 transitions. [2021-08-06 18:32:54,365 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) [2021-08-06 18:32:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 882 transitions. [2021-08-06 18:32:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:54,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:54,367 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, 1, 1] [2021-08-06 18:32:54,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 18:32:54,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:54,581 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash -284521584, now seen corresponding path program 2 times [2021-08-06 18:32:54,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:54,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315244893] [2021-08-06 18:32:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:54,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:54,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:54,650 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:54,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:32:54,663 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:32:54,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:54,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:54,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:54,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315244893] [2021-08-06 18:32:54,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315244893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:54,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390144324] [2021-08-06 18:32:54,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:32:54,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:54,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:54,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:54,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 18:32:54,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:32:54,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:32:54,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:55,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:55,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:55,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:55,421 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:55,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390144324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:55,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:55,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 18:32:55,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275344457] [2021-08-06 18:32:55,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:32:55,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:55,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:32:55,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:32:55,428 INFO L87 Difference]: Start difference. First operand 693 states and 882 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2021-08-06 18:32:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:55,564 INFO L93 Difference]: Finished difference Result 1182 states and 1490 transitions. [2021-08-06 18:32:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:32:55,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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 47 [2021-08-06 18:32:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:55,568 INFO L225 Difference]: With dead ends: 1182 [2021-08-06 18:32:55,568 INFO L226 Difference]: Without dead ends: 1102 [2021-08-06 18:32:55,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:32:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-08-06 18:32:55,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 698. [2021-08-06 18:32:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 687 states have (on average 1.299854439592431) internal successors, (893), 697 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 893 transitions. [2021-08-06 18:32:55,608 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 893 transitions. Word has length 47 [2021-08-06 18:32:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:55,608 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 893 transitions. [2021-08-06 18:32:55,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 12 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) [2021-08-06 18:32:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 893 transitions. [2021-08-06 18:32:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:55,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:55,609 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, 1, 1] [2021-08-06 18:32:55,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:55,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 18:32:55,825 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -36627110, now seen corresponding path program 3 times [2021-08-06 18:32:55,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:55,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551088443] [2021-08-06 18:32:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:55,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:55,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:55,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:32:55,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:55,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:55,919 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:55,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:55,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:55,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551088443] [2021-08-06 18:32:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551088443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:55,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637252190] [2021-08-06 18:32:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:32:55,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:55,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:55,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 18:32:56,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:32:56,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:32:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:56,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:32:56,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:32:56,645 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:56,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:56,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:56,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637252190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:56,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:56,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 18:32:56,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452286989] [2021-08-06 18:32:56,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:32:56,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:32:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:32:56,666 INFO L87 Difference]: Start difference. First operand 698 states and 893 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:56,977 INFO L93 Difference]: Finished difference Result 1644 states and 2110 transitions. [2021-08-06 18:32:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:32:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:56,982 INFO L225 Difference]: With dead ends: 1644 [2021-08-06 18:32:56,983 INFO L226 Difference]: Without dead ends: 1404 [2021-08-06 18:32:56,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:32:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-08-06 18:32:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 689. [2021-08-06 18:32:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 678 states have (on average 1.2979351032448379) internal successors, (880), 688 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 880 transitions. [2021-08-06 18:32:57,000 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 880 transitions. Word has length 47 [2021-08-06 18:32:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:57,001 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 880 transitions. [2021-08-06 18:32:57,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 880 transitions. [2021-08-06 18:32:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 18:32:57,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:57,002 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, 1, 1] [2021-08-06 18:32:57,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:57,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:57,217 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 708355918, now seen corresponding path program 2 times [2021-08-06 18:32:57,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:57,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885713339] [2021-08-06 18:32:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:57,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:57,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:57,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:32:57,296 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:57,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:32:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:57,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:57,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885713339] [2021-08-06 18:32:57,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885713339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:57,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153958993] [2021-08-06 18:32:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:32:57,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:57,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:57,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:57,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 18:32:57,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:32:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:57,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:32:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:58,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:58,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:58,086 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:58,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:58,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153958993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:58,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:58,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 18:32:58,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239069929] [2021-08-06 18:32:58,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:32:58,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:32:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:32:58,094 INFO L87 Difference]: Start difference. First operand 689 states and 880 transitions. Second operand has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:58,391 INFO L93 Difference]: Finished difference Result 1655 states and 2129 transitions. [2021-08-06 18:32:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:32:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-06 18:32:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:58,397 INFO L225 Difference]: With dead ends: 1655 [2021-08-06 18:32:58,397 INFO L226 Difference]: Without dead ends: 1415 [2021-08-06 18:32:58,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:32:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-08-06 18:32:58,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 709. [2021-08-06 18:32:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 698 states have (on average 1.2951289398280803) internal successors, (904), 708 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 904 transitions. [2021-08-06 18:32:58,414 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 904 transitions. Word has length 47 [2021-08-06 18:32:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:58,414 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 904 transitions. [2021-08-06 18:32:58,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.583333333333333) internal successors, (79), 12 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 904 transitions. [2021-08-06 18:32:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:32:58,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:58,415 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:32:58,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 18:32:58,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:58,639 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:32:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:32:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 443715637, now seen corresponding path program 4 times [2021-08-06 18:32:58,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:32:58,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124913506] [2021-08-06 18:32:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:32:58,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:32:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:32:58,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:58,700 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:32:58,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:58,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:32:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:58,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:32:58,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124913506] [2021-08-06 18:32:58,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124913506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:58,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589337043] [2021-08-06 18:32:58,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:32:58,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:32:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:32:58,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:32:58,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 18:32:59,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:32:59,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:32:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:32:59,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:32:59,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:32:59,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:59,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:32:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:32:59,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589337043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:32:59,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:32:59,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:32:59,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975583175] [2021-08-06 18:32:59,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:32:59,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:32:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:32:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:32:59,730 INFO L87 Difference]: Start difference. First operand 709 states and 904 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:32:59,804 INFO L93 Difference]: Finished difference Result 1186 states and 1508 transitions. [2021-08-06 18:32:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 18:32:59,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:32:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:32:59,808 INFO L225 Difference]: With dead ends: 1186 [2021-08-06 18:32:59,809 INFO L226 Difference]: Without dead ends: 1106 [2021-08-06 18:32:59,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:32:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-08-06 18:32:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 743. [2021-08-06 18:32:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 732 states have (on average 1.3087431693989071) internal successors, (958), 742 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:59,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 958 transitions. [2021-08-06 18:32:59,823 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 958 transitions. Word has length 52 [2021-08-06 18:32:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:32:59,824 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 958 transitions. [2021-08-06 18:32:59,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:32:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 958 transitions. [2021-08-06 18:32:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:32:59,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:32:59,825 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:32:59,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-06 18:33:00,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 18:33:00,050 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -933701953, now seen corresponding path program 1 times [2021-08-06 18:33:00,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:00,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163077887] [2021-08-06 18:33:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:00,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:00,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:00,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:00,162 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:00,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:00,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:00,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163077887] [2021-08-06 18:33:00,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163077887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:00,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703501211] [2021-08-06 18:33:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:00,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:00,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:00,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:00,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 18:33:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:00,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:00,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:00,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:01,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:01,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:01,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:01,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:01,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703501211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:01,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:01,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:01,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702588445] [2021-08-06 18:33:01,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:01,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:01,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:01,173 INFO L87 Difference]: Start difference. First operand 743 states and 958 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:01,377 INFO L93 Difference]: Finished difference Result 1418 states and 1780 transitions. [2021-08-06 18:33:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:33:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:01,381 INFO L225 Difference]: With dead ends: 1418 [2021-08-06 18:33:01,381 INFO L226 Difference]: Without dead ends: 1338 [2021-08-06 18:33:01,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:33:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-08-06 18:33:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 782. [2021-08-06 18:33:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 771 states have (on average 1.3073929961089494) internal successors, (1008), 781 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1008 transitions. [2021-08-06 18:33:01,397 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1008 transitions. Word has length 52 [2021-08-06 18:33:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:01,397 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1008 transitions. [2021-08-06 18:33:01,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1008 transitions. [2021-08-06 18:33:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:01,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:01,398 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:01,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:01,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 18:33:01,616 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash 626373637, now seen corresponding path program 3 times [2021-08-06 18:33:01,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:01,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467966690] [2021-08-06 18:33:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:01,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:01,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:01,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:01,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:01,686 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:01,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:01,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:01,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:01,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467966690] [2021-08-06 18:33:01,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467966690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:01,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081962747] [2021-08-06 18:33:01,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:01,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:01,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:01,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 18:33:02,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:33:02,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:02,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:02,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:02,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:02,410 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:02,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:02,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:02,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:02,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:02,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081962747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:02,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:02,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:02,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698316721] [2021-08-06 18:33:02,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:02,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:02,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:02,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:02,755 INFO L87 Difference]: Start difference. First operand 782 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:02,971 INFO L93 Difference]: Finished difference Result 1482 states and 1859 transitions. [2021-08-06 18:33:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:33:02,972 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:02,976 INFO L225 Difference]: With dead ends: 1482 [2021-08-06 18:33:02,976 INFO L226 Difference]: Without dead ends: 1322 [2021-08-06 18:33:02,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-08-06 18:33:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-08-06 18:33:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 823. [2021-08-06 18:33:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 812 states have (on average 1.2943349753694582) internal successors, (1051), 822 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1051 transitions. [2021-08-06 18:33:02,991 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1051 transitions. Word has length 52 [2021-08-06 18:33:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:02,991 INFO L470 AbstractCegarLoop]: Abstraction has 823 states and 1051 transitions. [2021-08-06 18:33:02,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1051 transitions. [2021-08-06 18:33:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:02,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:02,997 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-06 18:33:03,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 18:33:03,217 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:03,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:03,217 INFO L82 PathProgramCache]: Analyzing trace with hash -414513110, now seen corresponding path program 2 times [2021-08-06 18:33:03,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:03,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054910439] [2021-08-06 18:33:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:03,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:03,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:03,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:03,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:03,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:03,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:03,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:03,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:03,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:03,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:33:03,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 83.3 percent of original size [2021-08-06 18:33:03,338 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:03,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:03,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054910439] [2021-08-06 18:33:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054910439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605276938] [2021-08-06 18:33:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:03,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:03,365 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:03,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 18:33:03,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:04,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:04,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:04,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:04,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:04,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605276938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:04,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:04,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 18:33:04,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076399498] [2021-08-06 18:33:04,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 18:33:04,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:04,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 18:33:04,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:33:04,361 INFO L87 Difference]: Start difference. First operand 823 states and 1051 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:04,575 INFO L93 Difference]: Finished difference Result 1498 states and 1872 transitions. [2021-08-06 18:33:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:33:04,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:04,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:04,580 INFO L225 Difference]: With dead ends: 1498 [2021-08-06 18:33:04,580 INFO L226 Difference]: Without dead ends: 1338 [2021-08-06 18:33:04,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:33:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-08-06 18:33:04,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 833. [2021-08-06 18:33:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 822 states have (on average 1.305352798053528) internal successors, (1073), 832 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:04,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1073 transitions. [2021-08-06 18:33:04,600 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1073 transitions. Word has length 52 [2021-08-06 18:33:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:04,600 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1073 transitions. [2021-08-06 18:33:04,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1073 transitions. [2021-08-06 18:33:04,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:04,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:04,601 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:04,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:04,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 18:33:04,818 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2134164157, now seen corresponding path program 5 times [2021-08-06 18:33:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:04,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58147156] [2021-08-06 18:33:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:04,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:04,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:04,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:04,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:04,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:04,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:04,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:04,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:04,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58147156] [2021-08-06 18:33:04,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58147156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:04,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655583620] [2021-08-06 18:33:04,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:04,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:04,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:04,949 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:04,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 18:33:05,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:05,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:05,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:05,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:05,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:05,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:05,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655583620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:05,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:05,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:05,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711853797] [2021-08-06 18:33:05,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:05,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:05,955 INFO L87 Difference]: Start difference. First operand 833 states and 1073 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:06,104 INFO L93 Difference]: Finished difference Result 1356 states and 1711 transitions. [2021-08-06 18:33:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:33:06,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:06,107 INFO L225 Difference]: With dead ends: 1356 [2021-08-06 18:33:06,107 INFO L226 Difference]: Without dead ends: 1276 [2021-08-06 18:33:06,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-08-06 18:33:06,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 828. [2021-08-06 18:33:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 817 states have (on average 1.2998776009791921) internal successors, (1062), 827 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1062 transitions. [2021-08-06 18:33:06,118 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1062 transitions. Word has length 52 [2021-08-06 18:33:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:06,118 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1062 transitions. [2021-08-06 18:33:06,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1062 transitions. [2021-08-06 18:33:06,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:06,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:06,120 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:06,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:06,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 18:33:06,333 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1886269683, now seen corresponding path program 6 times [2021-08-06 18:33:06,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:06,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704326047] [2021-08-06 18:33:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:06,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:06,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:06,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:06,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:06,408 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:06,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:06,418 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:06,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704326047] [2021-08-06 18:33:06,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704326047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:06,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606985682] [2021-08-06 18:33:06,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:06,439 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:06,440 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:06,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 18:33:06,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:33:06,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:06,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:07,328 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:07,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:07,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:07,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:07,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:07,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:07,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606985682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:07,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:07,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-06 18:33:07,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156462859] [2021-08-06 18:33:07,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:33:07,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:33:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:33:07,353 INFO L87 Difference]: Start difference. First operand 828 states and 1062 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 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) [2021-08-06 18:33:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:07,612 INFO L93 Difference]: Finished difference Result 1709 states and 2166 transitions. [2021-08-06 18:33:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:33:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 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 52 [2021-08-06 18:33:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:07,617 INFO L225 Difference]: With dead ends: 1709 [2021-08-06 18:33:07,618 INFO L226 Difference]: Without dead ends: 1549 [2021-08-06 18:33:07,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-08-06 18:33:07,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2021-08-06 18:33:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 833. [2021-08-06 18:33:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 822 states have (on average 1.3004866180048662) internal successors, (1069), 832 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1069 transitions. [2021-08-06 18:33:07,644 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1069 transitions. Word has length 52 [2021-08-06 18:33:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:07,644 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1069 transitions. [2021-08-06 18:33:07,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 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) [2021-08-06 18:33:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1069 transitions. [2021-08-06 18:33:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:07,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:07,646 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:07,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:07,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:07,859 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:07,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1141286655, now seen corresponding path program 2 times [2021-08-06 18:33:07,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:07,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687640618] [2021-08-06 18:33:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:07,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:07,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:07,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:07,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:07,939 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:07,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:07,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:07,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:07,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687640618] [2021-08-06 18:33:07,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687640618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:07,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438107237] [2021-08-06 18:33:07,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:07,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:07,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:07,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:07,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 18:33:08,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:08,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:08,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:08,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:08,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:08,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:08,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:08,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438107237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:08,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:08,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731115366] [2021-08-06 18:33:08,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:08,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:08,988 INFO L87 Difference]: Start difference. First operand 833 states and 1069 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:09,586 INFO L93 Difference]: Finished difference Result 1927 states and 2432 transitions. [2021-08-06 18:33:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:33:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:09,591 INFO L225 Difference]: With dead ends: 1927 [2021-08-06 18:33:09,591 INFO L226 Difference]: Without dead ends: 1767 [2021-08-06 18:33:09,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:33:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-08-06 18:33:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 887. [2021-08-06 18:33:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 876 states have (on average 1.2956621004566211) internal successors, (1135), 886 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1135 transitions. [2021-08-06 18:33:09,627 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1135 transitions. Word has length 52 [2021-08-06 18:33:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:09,627 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1135 transitions. [2021-08-06 18:33:09,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1135 transitions. [2021-08-06 18:33:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-06 18:33:09,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:09,629 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:09,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:09,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:09,857 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1636542013, now seen corresponding path program 3 times [2021-08-06 18:33:09,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:09,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466337201] [2021-08-06 18:33:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:09,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:09,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:09,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:09,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:09,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:09,939 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:09,940 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:09,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:09,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466337201] [2021-08-06 18:33:09,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466337201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:09,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649652824] [2021-08-06 18:33:09,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:09,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:09,964 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:09,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 18:33:10,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:33:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:33:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:11,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:11,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:11,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:11,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:11,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:11,047 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:11,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649652824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:11,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:11,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 18:33:11,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914554257] [2021-08-06 18:33:11,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:33:11,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:33:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:33:11,053 INFO L87 Difference]: Start difference. First operand 887 states and 1135 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:11,613 INFO L93 Difference]: Finished difference Result 2096 states and 2649 transitions. [2021-08-06 18:33:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 18:33:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-06 18:33:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:11,618 INFO L225 Difference]: With dead ends: 2096 [2021-08-06 18:33:11,618 INFO L226 Difference]: Without dead ends: 1936 [2021-08-06 18:33:11,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:33:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-06 18:33:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 920. [2021-08-06 18:33:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 909 states have (on average 1.295929592959296) internal successors, (1178), 919 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1178 transitions. [2021-08-06 18:33:11,636 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1178 transitions. Word has length 52 [2021-08-06 18:33:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:11,636 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 1178 transitions. [2021-08-06 18:33:11,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1178 transitions. [2021-08-06 18:33:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:11,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:11,638 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:11,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:11,868 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:11,868 INFO L82 PathProgramCache]: Analyzing trace with hash 224709858, now seen corresponding path program 7 times [2021-08-06 18:33:11,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:11,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528996401] [2021-08-06 18:33:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:11,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:11,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:11,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:11,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:11,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:12,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:12,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528996401] [2021-08-06 18:33:12,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528996401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:12,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765208865] [2021-08-06 18:33:12,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:12,016 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:12,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:12,017 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:12,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 18:33:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:12,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:12,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:12,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:12,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:13,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:13,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:13,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765208865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:13,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913004884] [2021-08-06 18:33:13,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:13,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:13,397 INFO L87 Difference]: Start difference. First operand 920 states and 1178 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:13,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:13,508 INFO L93 Difference]: Finished difference Result 1586 states and 2007 transitions. [2021-08-06 18:33:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:33:13,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:13,514 INFO L225 Difference]: With dead ends: 1586 [2021-08-06 18:33:13,514 INFO L226 Difference]: Without dead ends: 1506 [2021-08-06 18:33:13,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:33:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-08-06 18:33:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 935. [2021-08-06 18:33:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 924 states have (on average 1.3106060606060606) internal successors, (1211), 934 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1211 transitions. [2021-08-06 18:33:13,528 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1211 transitions. Word has length 57 [2021-08-06 18:33:13,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:13,529 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1211 transitions. [2021-08-06 18:33:13,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1211 transitions. [2021-08-06 18:33:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:13,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:13,530 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, 1, 1] [2021-08-06 18:33:13,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:13,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 18:33:13,765 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1481264900, now seen corresponding path program 4 times [2021-08-06 18:33:13,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:13,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113188312] [2021-08-06 18:33:13,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:13,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:13,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:13,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:13,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:13,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:13,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:13,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113188312] [2021-08-06 18:33:13,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113188312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:13,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312707661] [2021-08-06 18:33:13,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:13,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:13,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:13,920 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:13,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 18:33:14,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:14,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:14,865 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:14,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:15,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:15,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:15,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312707661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:15,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:15,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:15,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971644648] [2021-08-06 18:33:15,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:15,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:15,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:15,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:15,358 INFO L87 Difference]: Start difference. First operand 935 states and 1211 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:15,585 INFO L93 Difference]: Finished difference Result 1626 states and 2055 transitions. [2021-08-06 18:33:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:33:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:15,589 INFO L225 Difference]: With dead ends: 1626 [2021-08-06 18:33:15,589 INFO L226 Difference]: Without dead ends: 1546 [2021-08-06 18:33:15,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:33:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-08-06 18:33:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 930. [2021-08-06 18:33:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 919 states have (on average 1.3057671381936888) internal successors, (1200), 929 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1200 transitions. [2021-08-06 18:33:15,612 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1200 transitions. Word has length 57 [2021-08-06 18:33:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1200 transitions. [2021-08-06 18:33:15,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1200 transitions. [2021-08-06 18:33:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:15,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:15,614 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, 1, 1] [2021-08-06 18:33:15,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:15,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:15,829 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:15,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1152707732, now seen corresponding path program 5 times [2021-08-06 18:33:15,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:15,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873342814] [2021-08-06 18:33:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:15,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:15,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:15,875 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:15,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:15,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:15,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:15,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873342814] [2021-08-06 18:33:15,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873342814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:15,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837077412] [2021-08-06 18:33:15,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:15,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:15,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:15,965 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:15,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 18:33:16,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:16,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:16,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:16,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:17,380 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:17,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:17,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837077412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:17,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:17,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:17,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952407268] [2021-08-06 18:33:17,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:17,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:17,387 INFO L87 Difference]: Start difference. First operand 930 states and 1200 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:17,736 INFO L93 Difference]: Finished difference Result 1922 states and 2414 transitions. [2021-08-06 18:33:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:33:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:17,740 INFO L225 Difference]: With dead ends: 1922 [2021-08-06 18:33:17,740 INFO L226 Difference]: Without dead ends: 1722 [2021-08-06 18:33:17,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:33:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-08-06 18:33:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 965. [2021-08-06 18:33:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 954 states have (on average 1.2935010482180294) internal successors, (1234), 964 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1234 transitions. [2021-08-06 18:33:17,756 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1234 transitions. Word has length 57 [2021-08-06 18:33:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1234 transitions. [2021-08-06 18:33:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1234 transitions. [2021-08-06 18:33:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:17,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:17,758 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, 1, 1] [2021-08-06 18:33:17,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-06 18:33:17,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:17,997 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash -526442256, now seen corresponding path program 6 times [2021-08-06 18:33:17,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:17,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134650266] [2021-08-06 18:33:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:17,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:18,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:18,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:18,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:18,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:18,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134650266] [2021-08-06 18:33:18,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134650266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240820037] [2021-08-06 18:33:18,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:18,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:18,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:18,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 18:33:18,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:33:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:19,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:19,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:19,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:19,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:19,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240820037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:19,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:19,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:19,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58793134] [2021-08-06 18:33:19,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:19,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:19,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:19,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:19,618 INFO L87 Difference]: Start difference. First operand 965 states and 1234 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:19,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:19,981 INFO L93 Difference]: Finished difference Result 2082 states and 2603 transitions. [2021-08-06 18:33:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:33:19,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:19,985 INFO L225 Difference]: With dead ends: 2082 [2021-08-06 18:33:19,985 INFO L226 Difference]: Without dead ends: 1882 [2021-08-06 18:33:19,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:33:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-08-06 18:33:19,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1054. [2021-08-06 18:33:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1043 states have (on average 1.2866730584851391) internal successors, (1342), 1053 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1342 transitions. [2021-08-06 18:33:20,002 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1342 transitions. Word has length 57 [2021-08-06 18:33:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:20,003 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1342 transitions. [2021-08-06 18:33:20,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1342 transitions. [2021-08-06 18:33:20,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:20,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:20,004 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, 1, 1] [2021-08-06 18:33:20,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:20,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:20,225 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 407367858, now seen corresponding path program 7 times [2021-08-06 18:33:20,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:20,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166014773] [2021-08-06 18:33:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:20,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:20,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:20,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:20,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:20,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:20,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:20,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166014773] [2021-08-06 18:33:20,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166014773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:20,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780630294] [2021-08-06 18:33:20,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:20,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:20,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:20,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:20,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 18:33:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:21,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:21,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:21,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:21,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:21,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780630294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:21,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:21,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:21,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497853311] [2021-08-06 18:33:21,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:21,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:21,848 INFO L87 Difference]: Start difference. First operand 1054 states and 1342 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:22,169 INFO L93 Difference]: Finished difference Result 2042 states and 2545 transitions. [2021-08-06 18:33:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:33:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:22,172 INFO L225 Difference]: With dead ends: 2042 [2021-08-06 18:33:22,172 INFO L226 Difference]: Without dead ends: 1962 [2021-08-06 18:33:22,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:33:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-08-06 18:33:22,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1069. [2021-08-06 18:33:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1058 states have (on average 1.285444234404537) internal successors, (1360), 1068 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1360 transitions. [2021-08-06 18:33:22,188 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1360 transitions. Word has length 57 [2021-08-06 18:33:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:22,188 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1360 transitions. [2021-08-06 18:33:22,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1360 transitions. [2021-08-06 18:33:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:22,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:22,190 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, 1, 1] [2021-08-06 18:33:22,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:22,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 18:33:22,403 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 594116128, now seen corresponding path program 8 times [2021-08-06 18:33:22,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:22,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787171443] [2021-08-06 18:33:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:22,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:22,446 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:22,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:22,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:22,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:33:22,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:22,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:22,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:22,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787171443] [2021-08-06 18:33:22,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787171443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:22,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408202653] [2021-08-06 18:33:22,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:22,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:22,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:22,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 18:33:23,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:23,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:23,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:23,698 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:24,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:24,072 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:24,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:24,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408202653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:24,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:24,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:24,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660172467] [2021-08-06 18:33:24,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:24,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:24,088 INFO L87 Difference]: Start difference. First operand 1069 states and 1360 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:24,318 INFO L93 Difference]: Finished difference Result 2031 states and 2540 transitions. [2021-08-06 18:33:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:33:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:24,321 INFO L225 Difference]: With dead ends: 2031 [2021-08-06 18:33:24,322 INFO L226 Difference]: Without dead ends: 1951 [2021-08-06 18:33:24,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:33:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-08-06 18:33:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1049. [2021-08-06 18:33:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1038 states have (on average 1.2822736030828517) internal successors, (1331), 1048 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:24,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1331 transitions. [2021-08-06 18:33:24,338 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1331 transitions. Word has length 57 [2021-08-06 18:33:24,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:24,338 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1331 transitions. [2021-08-06 18:33:24,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1331 transitions. [2021-08-06 18:33:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:24,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:24,340 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:24,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 18:33:24,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 18:33:24,561 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1111794544, now seen corresponding path program 8 times [2021-08-06 18:33:24,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:24,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898752074] [2021-08-06 18:33:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:24,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:24,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:24,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:24,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:24,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:24,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:24,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:24,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:24,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898752074] [2021-08-06 18:33:24,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898752074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:24,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226328704] [2021-08-06 18:33:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:24,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:24,699 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:24,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 18:33:25,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:33:25,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:26,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:26,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:26,211 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:26,212 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:26,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226328704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:26,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:26,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-06 18:33:26,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840504390] [2021-08-06 18:33:26,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:33:26,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:33:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:33:26,217 INFO L87 Difference]: Start difference. First operand 1049 states and 1331 transitions. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 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) [2021-08-06 18:33:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:26,357 INFO L93 Difference]: Finished difference Result 1866 states and 2321 transitions. [2021-08-06 18:33:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:33:26,357 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 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 57 [2021-08-06 18:33:26,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:26,360 INFO L225 Difference]: With dead ends: 1866 [2021-08-06 18:33:26,360 INFO L226 Difference]: Without dead ends: 1786 [2021-08-06 18:33:26,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:33:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-06 18:33:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1064. [2021-08-06 18:33:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1053 states have (on average 1.295346628679962) internal successors, (1364), 1063 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1364 transitions. [2021-08-06 18:33:26,376 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1364 transitions. Word has length 57 [2021-08-06 18:33:26,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:26,376 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1364 transitions. [2021-08-06 18:33:26,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 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) [2021-08-06 18:33:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1364 transitions. [2021-08-06 18:33:26,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:26,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:26,378 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:26,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:26,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 18:33:26,601 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:26,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1359689018, now seen corresponding path program 9 times [2021-08-06 18:33:26,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:26,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078475685] [2021-08-06 18:33:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:26,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:26,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:26,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:26,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:26,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:26,696 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:26,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:26,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:26,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078475685] [2021-08-06 18:33:26,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078475685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:26,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490571912] [2021-08-06 18:33:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:26,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:26,727 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:26,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 18:33:27,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:33:27,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:33:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:28,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:28,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:28,162 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:28,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:28,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:28,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:28,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490571912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:28,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-06 18:33:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948668399] [2021-08-06 18:33:28,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:33:28,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:33:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:33:28,178 INFO L87 Difference]: Start difference. First operand 1064 states and 1364 transitions. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 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) [2021-08-06 18:33:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:28,430 INFO L93 Difference]: Finished difference Result 2176 states and 2731 transitions. [2021-08-06 18:33:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:33:28,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 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 57 [2021-08-06 18:33:28,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:28,433 INFO L225 Difference]: With dead ends: 2176 [2021-08-06 18:33:28,433 INFO L226 Difference]: Without dead ends: 2016 [2021-08-06 18:33:28,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:33:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-08-06 18:33:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1064. [2021-08-06 18:33:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1053 states have (on average 1.295346628679962) internal successors, (1364), 1063 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1364 transitions. [2021-08-06 18:33:28,447 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1364 transitions. Word has length 57 [2021-08-06 18:33:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:28,447 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1364 transitions. [2021-08-06 18:33:28,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 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) [2021-08-06 18:33:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1364 transitions. [2021-08-06 18:33:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:28,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:28,449 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, 1, 1] [2021-08-06 18:33:28,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 18:33:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:28,665 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash -962265938, now seen corresponding path program 9 times [2021-08-06 18:33:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726512180] [2021-08-06 18:33:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:28,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:28,729 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:28,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:28,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:28,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:33:28,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:28,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:28,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726512180] [2021-08-06 18:33:28,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726512180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:28,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226514789] [2021-08-06 18:33:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:28,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:28,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:28,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 18:33:29,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:33:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:29,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:30,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:30,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:30,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226514789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:30,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:30,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:30,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764712351] [2021-08-06 18:33:30,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:30,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:30,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:30,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:30,421 INFO L87 Difference]: Start difference. First operand 1064 states and 1364 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:30,716 INFO L93 Difference]: Finished difference Result 1920 states and 2391 transitions. [2021-08-06 18:33:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:33:30,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:30,719 INFO L225 Difference]: With dead ends: 1920 [2021-08-06 18:33:30,719 INFO L226 Difference]: Without dead ends: 1840 [2021-08-06 18:33:30,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:33:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-08-06 18:33:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1059. [2021-08-06 18:33:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1048 states have (on average 1.291030534351145) internal successors, (1353), 1058 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:30,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1353 transitions. [2021-08-06 18:33:30,731 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1353 transitions. Word has length 57 [2021-08-06 18:33:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:30,731 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 1353 transitions. [2021-08-06 18:33:30,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1353 transitions. [2021-08-06 18:33:30,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:30,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:30,732 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, 1, 1] [2021-08-06 18:33:30,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 18:33:30,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:30,938 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:30,938 INFO L82 PathProgramCache]: Analyzing trace with hash 14079072, now seen corresponding path program 10 times [2021-08-06 18:33:30,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:30,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494431821] [2021-08-06 18:33:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:30,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:31,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:31,010 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:33:31,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:31,020 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:31,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:31,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:31,043 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:31,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:31,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494431821] [2021-08-06 18:33:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494431821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639083676] [2021-08-06 18:33:31,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:31,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:31,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:31,067 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:31,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 18:33:32,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:32,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:32,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:32,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:32,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:32,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:32,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:32,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639083676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:32,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:32,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 18:33:32,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40481480] [2021-08-06 18:33:32,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:33:32,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:33:32,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:33:32,663 INFO L87 Difference]: Start difference. First operand 1059 states and 1353 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:33,206 INFO L93 Difference]: Finished difference Result 2317 states and 2910 transitions. [2021-08-06 18:33:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:33:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:33,209 INFO L225 Difference]: With dead ends: 2317 [2021-08-06 18:33:33,210 INFO L226 Difference]: Without dead ends: 2157 [2021-08-06 18:33:33,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 527.7ms TimeCoverageRelationStatistics Valid=399, Invalid=1407, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 18:33:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-08-06 18:33:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1077. [2021-08-06 18:33:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1066 states have (on average 1.2861163227016885) internal successors, (1371), 1076 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 1371 transitions. [2021-08-06 18:33:33,228 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 1371 transitions. Word has length 57 [2021-08-06 18:33:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:33,228 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 1371 transitions. [2021-08-06 18:33:33,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 1371 transitions. [2021-08-06 18:33:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:33,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:33,230 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, 1, 1] [2021-08-06 18:33:33,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 18:33:33,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-06 18:33:33,445 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:33,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1609416688, now seen corresponding path program 11 times [2021-08-06 18:33:33,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:33,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828662228] [2021-08-06 18:33:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:33,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:33,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:33,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:33,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:33,533 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:33,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:33,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:33,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:33,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828662228] [2021-08-06 18:33:33,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828662228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:33,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438922772] [2021-08-06 18:33:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:33,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:33,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:33,574 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:33,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 18:33:34,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:34,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:35,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:35,279 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:35,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:35,288 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:35,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438922772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:35,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:35,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 18:33:35,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913800213] [2021-08-06 18:33:35,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:33:35,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:35,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:33:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:33:35,294 INFO L87 Difference]: Start difference. First operand 1077 states and 1371 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:36,081 INFO L93 Difference]: Finished difference Result 2399 states and 3012 transitions. [2021-08-06 18:33:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 18:33:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:36,086 INFO L225 Difference]: With dead ends: 2399 [2021-08-06 18:33:36,086 INFO L226 Difference]: Without dead ends: 2239 [2021-08-06 18:33:36,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 764.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1809, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 18:33:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-08-06 18:33:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1092. [2021-08-06 18:33:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1081 states have (on average 1.2765957446808511) internal successors, (1380), 1091 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:36,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 1380 transitions. [2021-08-06 18:33:36,107 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 1380 transitions. Word has length 57 [2021-08-06 18:33:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:36,107 INFO L470 AbstractCegarLoop]: Abstraction has 1092 states and 1380 transitions. [2021-08-06 18:33:36,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 1380 transitions. [2021-08-06 18:33:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:36,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:36,109 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, 1, 1] [2021-08-06 18:33:36,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:36,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 18:33:36,325 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash 44065322, now seen corresponding path program 12 times [2021-08-06 18:33:36,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:36,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961584923] [2021-08-06 18:33:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:36,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:36,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:33:36,409 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:33:36,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:36,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:33:36,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:36,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:33:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:36,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:36,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961584923] [2021-08-06 18:33:36,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961584923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:36,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554649598] [2021-08-06 18:33:36,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:36,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:36,465 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:36,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 18:33:37,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:33:37,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:37,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:37,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:38,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:38,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:38,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554649598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:38,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:38,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 18:33:38,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504285117] [2021-08-06 18:33:38,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 18:33:38,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:38,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 18:33:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:33:38,172 INFO L87 Difference]: Start difference. First operand 1092 states and 1380 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:39,121 INFO L93 Difference]: Finished difference Result 3086 states and 3866 transitions. [2021-08-06 18:33:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 18:33:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:39,128 INFO L225 Difference]: With dead ends: 3086 [2021-08-06 18:33:39,128 INFO L226 Difference]: Without dead ends: 2766 [2021-08-06 18:33:39,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=752, Invalid=2788, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 18:33:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-08-06 18:33:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1247. [2021-08-06 18:33:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1236 states have (on average 1.2710355987055015) internal successors, (1571), 1246 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1571 transitions. [2021-08-06 18:33:39,156 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1571 transitions. Word has length 57 [2021-08-06 18:33:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:39,156 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1571 transitions. [2021-08-06 18:33:39,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1571 transitions. [2021-08-06 18:33:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:39,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:39,158 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, 1, 1] [2021-08-06 18:33:39,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:39,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:39,373 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1567847574, now seen corresponding path program 13 times [2021-08-06 18:33:39,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:39,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129020146] [2021-08-06 18:33:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:39,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:39,460 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:39,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:33:39,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:39,473 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:39,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:39,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:39,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:39,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:39,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:39,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129020146] [2021-08-06 18:33:39,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129020146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:39,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521652539] [2021-08-06 18:33:39,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:39,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:39,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:39,533 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:39,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 18:33:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:40,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:40,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:41,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:33:41,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:33:41,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:41,256 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:41,265 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:41,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:41,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521652539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:41,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:41,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 18:33:41,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527153265] [2021-08-06 18:33:41,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:33:41,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:41,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:33:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:33:41,272 INFO L87 Difference]: Start difference. First operand 1247 states and 1571 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:42,171 INFO L93 Difference]: Finished difference Result 2804 states and 3524 transitions. [2021-08-06 18:33:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 18:33:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:42,179 INFO L225 Difference]: With dead ends: 2804 [2021-08-06 18:33:42,179 INFO L226 Difference]: Without dead ends: 2644 [2021-08-06 18:33:42,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 849.1ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 18:33:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2021-08-06 18:33:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1272. [2021-08-06 18:33:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1261 states have (on average 1.2767644726407612) internal successors, (1610), 1271 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1610 transitions. [2021-08-06 18:33:42,204 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1610 transitions. Word has length 57 [2021-08-06 18:33:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:42,204 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1610 transitions. [2021-08-06 18:33:42,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1610 transitions. [2021-08-06 18:33:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-06 18:33:42,206 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:42,206 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, 1, 1] [2021-08-06 18:33:42,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:42,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:42,425 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:42,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash -73618500, now seen corresponding path program 14 times [2021-08-06 18:33:42,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:42,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178741445] [2021-08-06 18:33:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:42,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:42,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:42,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:33:42,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:42,513 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:33:42,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:42,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:42,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:42,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178741445] [2021-08-06 18:33:42,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178741445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:42,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653141760] [2021-08-06 18:33:42,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:33:42,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:42,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:42,553 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:42,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 18:33:43,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:33:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:33:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:44,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:44,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:33:44,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:44,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:44,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:44,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:44,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653141760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:44,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:44,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 18:33:44,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280123987] [2021-08-06 18:33:44,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:33:44,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:33:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:33:44,289 INFO L87 Difference]: Start difference. First operand 1272 states and 1610 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:45,032 INFO L93 Difference]: Finished difference Result 2716 states and 3420 transitions. [2021-08-06 18:33:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 18:33:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-06 18:33:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:45,035 INFO L225 Difference]: With dead ends: 2716 [2021-08-06 18:33:45,035 INFO L226 Difference]: Without dead ends: 2556 [2021-08-06 18:33:45,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:33:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-08-06 18:33:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1250. [2021-08-06 18:33:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1239 states have (on average 1.2736077481840193) internal successors, (1578), 1249 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1578 transitions. [2021-08-06 18:33:45,049 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1578 transitions. Word has length 57 [2021-08-06 18:33:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:45,049 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1578 transitions. [2021-08-06 18:33:45,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1578 transitions. [2021-08-06 18:33:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:45,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:45,050 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:33:45,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 18:33:45,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:45,272 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:45,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1414630315, now seen corresponding path program 10 times [2021-08-06 18:33:45,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:45,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522078065] [2021-08-06 18:33:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:45,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:45,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:45,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:45,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:45,413 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:45,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:45,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522078065] [2021-08-06 18:33:45,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522078065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:45,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9417851] [2021-08-06 18:33:45,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:45,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:45,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:45,442 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:33:45,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 18:33:46,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:46,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:46,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:46,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:47,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:47,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:47,361 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:47,362 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9417851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:47,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:47,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:33:47,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733975493] [2021-08-06 18:33:47,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:33:47,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:47,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:33:47,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:33:47,367 INFO L87 Difference]: Start difference. First operand 1250 states and 1578 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:47,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:47,462 INFO L93 Difference]: Finished difference Result 1968 states and 2472 transitions. [2021-08-06 18:33:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 18:33:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:33:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:47,465 INFO L225 Difference]: With dead ends: 1968 [2021-08-06 18:33:47,465 INFO L226 Difference]: Without dead ends: 1888 [2021-08-06 18:33:47,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:33:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-08-06 18:33:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1270. [2021-08-06 18:33:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1259 states have (on average 1.2883240667196187) internal successors, (1622), 1269 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1622 transitions. [2021-08-06 18:33:47,477 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1622 transitions. Word has length 62 [2021-08-06 18:33:47,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:47,477 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1622 transitions. [2021-08-06 18:33:47,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1622 transitions. [2021-08-06 18:33:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:47,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:47,479 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:47,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 18:33:47,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 18:33:47,679 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:47,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:47,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1174362223, now seen corresponding path program 15 times [2021-08-06 18:33:47,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:47,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216811531] [2021-08-06 18:33:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:47,680 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:47,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:47,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:47,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:47,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:47,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216811531] [2021-08-06 18:33:47,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216811531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:47,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142008574] [2021-08-06 18:33:47,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:33:47,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:47,823 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) [2021-08-06 18:33:47,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 18:33:49,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:33:49,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:49,354 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:49,356 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:49,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:49,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:49,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:49,837 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:49,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142008574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:49,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:49,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:33:49,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459640054] [2021-08-06 18:33:49,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:33:49,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:33:49,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:33:49,844 INFO L87 Difference]: Start difference. First operand 1270 states and 1622 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:50,053 INFO L93 Difference]: Finished difference Result 2113 states and 2647 transitions. [2021-08-06 18:33:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:33:50,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:33:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:50,055 INFO L225 Difference]: With dead ends: 2113 [2021-08-06 18:33:50,055 INFO L226 Difference]: Without dead ends: 2033 [2021-08-06 18:33:50,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:33:50,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-08-06 18:33:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1265. [2021-08-06 18:33:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1254 states have (on average 1.284688995215311) internal successors, (1611), 1264 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1611 transitions. [2021-08-06 18:33:50,069 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1611 transitions. Word has length 62 [2021-08-06 18:33:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:50,069 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 1611 transitions. [2021-08-06 18:33:50,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:50,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1611 transitions. [2021-08-06 18:33:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:50,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:50,070 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:50,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:50,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 18:33:50,271 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:50,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1502919391, now seen corresponding path program 16 times [2021-08-06 18:33:50,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:50,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61419648] [2021-08-06 18:33:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:50,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:50,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:50,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:50,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:50,404 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:50,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:50,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61419648] [2021-08-06 18:33:50,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61419648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:50,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187832120] [2021-08-06 18:33:50,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:33:50,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:50,430 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) [2021-08-06 18:33:50,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 18:33:51,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:33:51,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:51,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:51,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:51,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:51,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:52,505 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:52,506 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:52,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:52,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:52,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187832120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:52,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:52,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:33:52,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277806717] [2021-08-06 18:33:52,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:33:52,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:33:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:33:52,521 INFO L87 Difference]: Start difference. First operand 1265 states and 1611 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:52,827 INFO L93 Difference]: Finished difference Result 2262 states and 2834 transitions. [2021-08-06 18:33:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:33:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:33:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:52,830 INFO L225 Difference]: With dead ends: 2262 [2021-08-06 18:33:52,830 INFO L226 Difference]: Without dead ends: 2182 [2021-08-06 18:33:52,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:33:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-08-06 18:33:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1260. [2021-08-06 18:33:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1249 states have (on average 1.2810248198558847) internal successors, (1600), 1259 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1600 transitions. [2021-08-06 18:33:52,845 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1600 transitions. Word has length 62 [2021-08-06 18:33:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:52,845 INFO L470 AbstractCegarLoop]: Abstraction has 1260 states and 1600 transitions. [2021-08-06 18:33:52,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1600 transitions. [2021-08-06 18:33:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:52,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:52,847 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:52,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:53,068 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,SelfDestructingSolverStorable37 [2021-08-06 18:33:53,069 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2129184867, now seen corresponding path program 17 times [2021-08-06 18:33:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:53,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906985471] [2021-08-06 18:33:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:53,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:53,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:53,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:53,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:53,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:53,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:53,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906985471] [2021-08-06 18:33:53,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906985471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:53,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884315027] [2021-08-06 18:33:53,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:33:53,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:53,223 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) [2021-08-06 18:33:53,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 18:33:54,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:33:54,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:54,875 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:54,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:55,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:55,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:55,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:55,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:55,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884315027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:55,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:55,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:33:55,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410218534] [2021-08-06 18:33:55,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:33:55,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:55,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:33:55,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:33:55,382 INFO L87 Difference]: Start difference. First operand 1260 states and 1600 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:55,729 INFO L93 Difference]: Finished difference Result 2342 states and 2930 transitions. [2021-08-06 18:33:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:33:55,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:33:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:55,732 INFO L225 Difference]: With dead ends: 2342 [2021-08-06 18:33:55,732 INFO L226 Difference]: Without dead ends: 2262 [2021-08-06 18:33:55,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:33:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-08-06 18:33:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1285. [2021-08-06 18:33:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1274 states have (on average 1.2802197802197801) internal successors, (1631), 1284 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1631 transitions. [2021-08-06 18:33:55,744 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1631 transitions. Word has length 62 [2021-08-06 18:33:55,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:55,745 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1631 transitions. [2021-08-06 18:33:55,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1631 transitions. [2021-08-06 18:33:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:55,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:55,747 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:55,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:55,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 18:33:55,965 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1231972315, now seen corresponding path program 18 times [2021-08-06 18:33:55,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:55,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296530514] [2021-08-06 18:33:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:55,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:56,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:56,007 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:56,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:56,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:56,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:56,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296530514] [2021-08-06 18:33:56,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296530514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:56,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187091114] [2021-08-06 18:33:56,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:33:56,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:56,104 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) [2021-08-06 18:33:56,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 18:33:57,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:33:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:33:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:33:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:33:57,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:57,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:58,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:58,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:33:58,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:58,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:33:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187091114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:58,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:33:58,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:33:58,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680130654] [2021-08-06 18:33:58,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:33:58,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:33:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:33:58,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:33:58,333 INFO L87 Difference]: Start difference. First operand 1285 states and 1631 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:33:58,800 INFO L93 Difference]: Finished difference Result 2307 states and 2893 transitions. [2021-08-06 18:33:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:33:58,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:33:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:33:58,804 INFO L225 Difference]: With dead ends: 2307 [2021-08-06 18:33:58,804 INFO L226 Difference]: Without dead ends: 2227 [2021-08-06 18:33:58,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 522.2ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:33:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2021-08-06 18:33:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 1285. [2021-08-06 18:33:58,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1274 states have (on average 1.2802197802197801) internal successors, (1631), 1284 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1631 transitions. [2021-08-06 18:33:58,822 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1631 transitions. Word has length 62 [2021-08-06 18:33:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:33:58,822 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1631 transitions. [2021-08-06 18:33:58,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:33:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1631 transitions. [2021-08-06 18:33:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:33:58,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:33:58,824 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:33:58,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 18:33:59,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 18:33:59,049 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:33:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:33:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash -704815839, now seen corresponding path program 19 times [2021-08-06 18:33:59,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:33:59,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856381055] [2021-08-06 18:33:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:33:59,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:33:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:33:59,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:59,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:33:59,169 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:59,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:33:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:33:59,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:33:59,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856381055] [2021-08-06 18:33:59,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856381055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:33:59,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770329397] [2021-08-06 18:33:59,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:33:59,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:33:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:33:59,203 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) [2021-08-06 18:33:59,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 18:34:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:00,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:00,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:01,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:01,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:01,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:01,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:01,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770329397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:01,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:01,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:01,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913557098] [2021-08-06 18:34:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:01,401 INFO L87 Difference]: Start difference. First operand 1285 states and 1631 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:01,865 INFO L93 Difference]: Finished difference Result 2604 states and 3236 transitions. [2021-08-06 18:34:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:34:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:01,868 INFO L225 Difference]: With dead ends: 2604 [2021-08-06 18:34:01,868 INFO L226 Difference]: Without dead ends: 2524 [2021-08-06 18:34:01,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:34:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-08-06 18:34:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1354. [2021-08-06 18:34:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1343 states have (on average 1.2762472077438571) internal successors, (1714), 1353 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1714 transitions. [2021-08-06 18:34:01,881 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1714 transitions. Word has length 62 [2021-08-06 18:34:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:01,882 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1714 transitions. [2021-08-06 18:34:01,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1714 transitions. [2021-08-06 18:34:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:01,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:01,883 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:01,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 18:34:02,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:02,084 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1045224045, now seen corresponding path program 20 times [2021-08-06 18:34:02,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:02,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266025100] [2021-08-06 18:34:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:02,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:02,124 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:02,125 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:02,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:02,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:02,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:02,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266025100] [2021-08-06 18:34:02,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266025100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:02,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395759940] [2021-08-06 18:34:02,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:34:02,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:02,233 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) [2021-08-06 18:34:02,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 18:34:03,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:34:03,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:03,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:04,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:04,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:04,426 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:04,427 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:04,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:04,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:04,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395759940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:04,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:04,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:04,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951042778] [2021-08-06 18:34:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:04,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:04,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:04,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:04,441 INFO L87 Difference]: Start difference. First operand 1354 states and 1714 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:04,876 INFO L93 Difference]: Finished difference Result 2604 states and 3236 transitions. [2021-08-06 18:34:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:34:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:04,879 INFO L225 Difference]: With dead ends: 2604 [2021-08-06 18:34:04,879 INFO L226 Difference]: Without dead ends: 2524 [2021-08-06 18:34:04,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:34:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-08-06 18:34:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1354. [2021-08-06 18:34:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1343 states have (on average 1.2762472077438571) internal successors, (1714), 1353 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1714 transitions. [2021-08-06 18:34:04,893 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1714 transitions. Word has length 62 [2021-08-06 18:34:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:04,894 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1714 transitions. [2021-08-06 18:34:04,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1714 transitions. [2021-08-06 18:34:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:04,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:04,896 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:34:04,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 18:34:05,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:05,121 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:05,121 INFO L82 PathProgramCache]: Analyzing trace with hash 610243685, now seen corresponding path program 4 times [2021-08-06 18:34:05,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:05,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944547508] [2021-08-06 18:34:05,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:05,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:05,173 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:05,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:05,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:34:05,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:34:05,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:05,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:05,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:05,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944547508] [2021-08-06 18:34:05,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944547508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:05,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595193574] [2021-08-06 18:34:05,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:34:05,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:05,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:05,285 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) [2021-08-06 18:34:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 18:34:06,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:34:06,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:07,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:07,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:07,562 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:07,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:07,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:07,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:07,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595193574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:07,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:07,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279760408] [2021-08-06 18:34:07,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:07,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:07,580 INFO L87 Difference]: Start difference. First operand 1354 states and 1714 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:07,993 INFO L93 Difference]: Finished difference Result 2533 states and 3154 transitions. [2021-08-06 18:34:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:34:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:07,997 INFO L225 Difference]: With dead ends: 2533 [2021-08-06 18:34:07,997 INFO L226 Difference]: Without dead ends: 2373 [2021-08-06 18:34:07,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=338, Invalid=994, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:34:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-08-06 18:34:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1404. [2021-08-06 18:34:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1393 states have (on average 1.2720746590093324) internal successors, (1772), 1403 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1772 transitions. [2021-08-06 18:34:08,016 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1772 transitions. Word has length 62 [2021-08-06 18:34:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:08,018 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1772 transitions. [2021-08-06 18:34:08,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1772 transitions. [2021-08-06 18:34:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:08,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:08,020 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:08,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:08,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:08,234 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:08,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:08,235 INFO L82 PathProgramCache]: Analyzing trace with hash -972177935, now seen corresponding path program 21 times [2021-08-06 18:34:08,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:08,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352566620] [2021-08-06 18:34:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:08,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:08,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:08,276 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:08,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:34:08,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:34:08,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:08,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:08,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:08,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352566620] [2021-08-06 18:34:08,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352566620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:08,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694389144] [2021-08-06 18:34:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:34:08,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:08,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:08,377 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) [2021-08-06 18:34:08,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 18:34:10,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:34:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:10,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:10,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:10,317 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:10,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:10,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:10,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:10,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:10,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:10,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694389144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:10,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:10,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002575418] [2021-08-06 18:34:10,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:10,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:10,772 INFO L87 Difference]: Start difference. First operand 1404 states and 1772 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:11,103 INFO L93 Difference]: Finished difference Result 2671 states and 3318 transitions. [2021-08-06 18:34:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:34:11,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:11,106 INFO L225 Difference]: With dead ends: 2671 [2021-08-06 18:34:11,106 INFO L226 Difference]: Without dead ends: 2591 [2021-08-06 18:34:11,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:34:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-08-06 18:34:11,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 1387. [2021-08-06 18:34:11,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1376 states have (on average 1.2776162790697674) internal successors, (1758), 1386 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1758 transitions. [2021-08-06 18:34:11,120 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1758 transitions. Word has length 62 [2021-08-06 18:34:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:11,120 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 1758 transitions. [2021-08-06 18:34:11,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:11,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1758 transitions. [2021-08-06 18:34:11,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:11,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:11,121 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:11,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 18:34:11,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-06 18:34:11,322 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash -85935399, now seen corresponding path program 22 times [2021-08-06 18:34:11,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:11,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521668164] [2021-08-06 18:34:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:11,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:11,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:11,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:34:11,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:34:11,380 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:34:11,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:11,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:11,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:11,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521668164] [2021-08-06 18:34:11,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521668164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:11,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512253627] [2021-08-06 18:34:11,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:34:11,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:11,461 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) [2021-08-06 18:34:11,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 18:34:13,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:34:13,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:13,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:13,394 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:13,395 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:13,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:13,853 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:13,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:13,862 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:13,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512253627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:13,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:13,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:13,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565279120] [2021-08-06 18:34:13,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:13,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:13,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:13,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:13,867 INFO L87 Difference]: Start difference. First operand 1387 states and 1758 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:14,094 INFO L93 Difference]: Finished difference Result 2287 states and 2854 transitions. [2021-08-06 18:34:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:34:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:14,097 INFO L225 Difference]: With dead ends: 2287 [2021-08-06 18:34:14,097 INFO L226 Difference]: Without dead ends: 2207 [2021-08-06 18:34:14,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:34:14,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-08-06 18:34:14,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1374. [2021-08-06 18:34:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1363 states have (on average 1.2692589875275129) internal successors, (1730), 1373 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:14,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1730 transitions. [2021-08-06 18:34:14,108 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1730 transitions. Word has length 62 [2021-08-06 18:34:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:14,108 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 1730 transitions. [2021-08-06 18:34:14,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1730 transitions. [2021-08-06 18:34:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:14,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:14,110 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:14,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:14,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 18:34:14,310 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1174723658, now seen corresponding path program 3 times [2021-08-06 18:34:14,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:14,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940348992] [2021-08-06 18:34:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:14,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:14,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:14,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940348992] [2021-08-06 18:34:14,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940348992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:14,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270356254] [2021-08-06 18:34:14,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:34:14,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:14,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:14,417 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) [2021-08-06 18:34:14,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 18:34:16,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:34:16,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:34:16,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:16,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:34:16,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:34:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270356254] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:34:16,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 18:34:16,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-06 18:34:16,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036779398] [2021-08-06 18:34:16,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:34:16,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:34:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:34:16,530 INFO L87 Difference]: Start difference. First operand 1374 states and 1730 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:16,688 INFO L93 Difference]: Finished difference Result 2302 states and 2944 transitions. [2021-08-06 18:34:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:34:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:16,692 INFO L225 Difference]: With dead ends: 2302 [2021-08-06 18:34:16,692 INFO L226 Difference]: Without dead ends: 2278 [2021-08-06 18:34:16,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:34:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-08-06 18:34:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2215. [2021-08-06 18:34:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2204 states have (on average 1.3026315789473684) internal successors, (2871), 2214 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 2871 transitions. [2021-08-06 18:34:16,719 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 2871 transitions. Word has length 62 [2021-08-06 18:34:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:16,719 INFO L470 AbstractCegarLoop]: Abstraction has 2215 states and 2871 transitions. [2021-08-06 18:34:16,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 2871 transitions. [2021-08-06 18:34:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:16,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:16,722 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:34:16,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:16,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 18:34:16,939 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash -544927389, now seen corresponding path program 11 times [2021-08-06 18:34:16,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:16,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182821771] [2021-08-06 18:34:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:16,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:17,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:17,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:17,062 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:34:17,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:34:17,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:17,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:34:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:17,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:17,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182821771] [2021-08-06 18:34:17,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182821771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:17,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405930009] [2021-08-06 18:34:17,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:34:17,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:17,101 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) [2021-08-06 18:34:17,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 18:34:18,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:34:18,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:19,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:19,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:19,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:19,496 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:19,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405930009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:19,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:19,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-06 18:34:19,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143743273] [2021-08-06 18:34:19,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 18:34:19,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 18:34:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-06 18:34:19,503 INFO L87 Difference]: Start difference. First operand 2215 states and 2871 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:19,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:19,689 INFO L93 Difference]: Finished difference Result 2746 states and 3496 transitions. [2021-08-06 18:34:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:34:19,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:19,692 INFO L225 Difference]: With dead ends: 2746 [2021-08-06 18:34:19,693 INFO L226 Difference]: Without dead ends: 2676 [2021-08-06 18:34:19,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:34:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-08-06 18:34:19,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2194. [2021-08-06 18:34:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2183 states have (on average 1.3027943197434724) internal successors, (2844), 2193 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2844 transitions. [2021-08-06 18:34:19,716 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2844 transitions. Word has length 62 [2021-08-06 18:34:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:19,717 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 2844 transitions. [2021-08-06 18:34:19,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2844 transitions. [2021-08-06 18:34:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:19,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:19,719 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:34:19,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:19,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 18:34:19,941 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash -297032915, now seen corresponding path program 12 times [2021-08-06 18:34:19,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:19,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371671480] [2021-08-06 18:34:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:19,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:20,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:20,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:34:20,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:20,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:20,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:20,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:20,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:20,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371671480] [2021-08-06 18:34:20,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371671480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:20,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736803134] [2021-08-06 18:34:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:34:20,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:20,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:20,088 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) [2021-08-06 18:34:20,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 18:34:21,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:34:21,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:21,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:34:21,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:22,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:22,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:22,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:22,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:22,422 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:22,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:22,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736803134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:22,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:22,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-06 18:34:22,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658354514] [2021-08-06 18:34:22,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:34:22,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:22,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:34:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:34:22,428 INFO L87 Difference]: Start difference. First operand 2194 states and 2844 transitions. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:22,768 INFO L93 Difference]: Finished difference Result 3946 states and 4977 transitions. [2021-08-06 18:34:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:34:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:22,772 INFO L225 Difference]: With dead ends: 3946 [2021-08-06 18:34:22,772 INFO L226 Difference]: Without dead ends: 3756 [2021-08-06 18:34:22,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:34:22,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3756 states. [2021-08-06 18:34:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3756 to 2201. [2021-08-06 18:34:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2190 states have (on average 1.3004566210045663) internal successors, (2848), 2200 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2848 transitions. [2021-08-06 18:34:22,836 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2848 transitions. Word has length 62 [2021-08-06 18:34:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:22,837 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 2848 transitions. [2021-08-06 18:34:22,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2848 transitions. [2021-08-06 18:34:22,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:22,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:22,839 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:22,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:23,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:23,061 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -47305245, now seen corresponding path program 23 times [2021-08-06 18:34:23,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:23,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059922439] [2021-08-06 18:34:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:23,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:23,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:23,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:23,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:23,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:23,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:23,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:23,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:23,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059922439] [2021-08-06 18:34:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059922439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:23,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339510468] [2021-08-06 18:34:23,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:34:23,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:23,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:23,199 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) [2021-08-06 18:34:23,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 18:34:25,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:34:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:25,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:25,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:25,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339510468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:25,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:25,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:25,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985393521] [2021-08-06 18:34:25,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:25,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:25,896 INFO L87 Difference]: Start difference. First operand 2201 states and 2848 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:26,825 INFO L93 Difference]: Finished difference Result 5036 states and 6393 transitions. [2021-08-06 18:34:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 18:34:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:26,830 INFO L225 Difference]: With dead ends: 5036 [2021-08-06 18:34:26,831 INFO L226 Difference]: Without dead ends: 4646 [2021-08-06 18:34:26,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=720, Invalid=2702, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 18:34:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-08-06 18:34:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 2245. [2021-08-06 18:34:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2234 states have (on average 1.3070725156669651) internal successors, (2920), 2244 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 2920 transitions. [2021-08-06 18:34:26,864 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 2920 transitions. Word has length 62 [2021-08-06 18:34:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:26,864 INFO L470 AbstractCegarLoop]: Abstraction has 2245 states and 2920 transitions. [2021-08-06 18:34:26,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 2920 transitions. [2021-08-06 18:34:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:26,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:26,867 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:26,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:27,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 18:34:27,081 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1612656611, now seen corresponding path program 24 times [2021-08-06 18:34:27,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:27,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842492927] [2021-08-06 18:34:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:27,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:27,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:34:27,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:34:27,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:27,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:27,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:27,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:27,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:27,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842492927] [2021-08-06 18:34:27,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842492927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:27,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205960756] [2021-08-06 18:34:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:34:27,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:27,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:27,225 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:27,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 18:34:29,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:34:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:29,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:29,862 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:29,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205960756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:29,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:29,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:29,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048900611] [2021-08-06 18:34:29,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:29,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:29,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:29,867 INFO L87 Difference]: Start difference. First operand 2245 states and 2920 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:31,198 INFO L93 Difference]: Finished difference Result 5190 states and 6580 transitions. [2021-08-06 18:34:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 18:34:31,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:31,203 INFO L225 Difference]: With dead ends: 5190 [2021-08-06 18:34:31,203 INFO L226 Difference]: Without dead ends: 4790 [2021-08-06 18:34:31,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1260.8ms TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 18:34:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2021-08-06 18:34:31,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 2346. [2021-08-06 18:34:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2335 states have (on average 1.3066381156316917) internal successors, (3051), 2345 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 3051 transitions. [2021-08-06 18:34:31,227 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 3051 transitions. Word has length 62 [2021-08-06 18:34:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:31,227 INFO L470 AbstractCegarLoop]: Abstraction has 2346 states and 3051 transitions. [2021-08-06 18:34:31,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 3051 transitions. [2021-08-06 18:34:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:31,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:31,229 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:31,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 18:34:31,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 18:34:31,430 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:31,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:31,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1329215255, now seen corresponding path program 25 times [2021-08-06 18:34:31,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:31,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989377891] [2021-08-06 18:34:31,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:31,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:31,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:31,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:31,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:31,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:31,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:31,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:31,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:31,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989377891] [2021-08-06 18:34:31,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989377891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:31,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745646677] [2021-08-06 18:34:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:34:31,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:31,570 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:31,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 18:34:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:33,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:34,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:34,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:34,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745646677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:34,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:34,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:34,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36908695] [2021-08-06 18:34:34,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:34,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:34,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:34,353 INFO L87 Difference]: Start difference. First operand 2346 states and 3051 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:35,544 INFO L93 Difference]: Finished difference Result 5087 states and 6499 transitions. [2021-08-06 18:34:35,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 18:34:35,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:35,549 INFO L225 Difference]: With dead ends: 5087 [2021-08-06 18:34:35,550 INFO L226 Difference]: Without dead ends: 4707 [2021-08-06 18:34:35,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1101.2ms TimeCoverageRelationStatistics Valid=823, Invalid=2959, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 18:34:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-08-06 18:34:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 2332. [2021-08-06 18:34:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2321 states have (on average 1.3119345109866436) internal successors, (3045), 2331 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 3045 transitions. [2021-08-06 18:34:35,587 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 3045 transitions. Word has length 62 [2021-08-06 18:34:35,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:35,587 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 3045 transitions. [2021-08-06 18:34:35,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:35,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 3045 transitions. [2021-08-06 18:34:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:35,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:35,590 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:35,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:35,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-06 18:34:35,817 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1844292257, now seen corresponding path program 26 times [2021-08-06 18:34:35,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:35,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858765235] [2021-08-06 18:34:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:35,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:35,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:34:35,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:34:35,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:35,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:35,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:35,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:36,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:36,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858765235] [2021-08-06 18:34:36,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858765235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:36,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372124971] [2021-08-06 18:34:36,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:34:36,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:36,005 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:36,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 18:34:38,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:34:38,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:38,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:38,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:38,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:38,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:38,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372124971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:38,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:38,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:38,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484780297] [2021-08-06 18:34:38,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:38,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:38,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:38,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:38,739 INFO L87 Difference]: Start difference. First operand 2332 states and 3045 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:40,018 INFO L93 Difference]: Finished difference Result 5666 states and 7277 transitions. [2021-08-06 18:34:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 18:34:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:40,023 INFO L225 Difference]: With dead ends: 5666 [2021-08-06 18:34:40,023 INFO L226 Difference]: Without dead ends: 5011 [2021-08-06 18:34:40,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1211.9ms TimeCoverageRelationStatistics Valid=1121, Invalid=4135, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 18:34:40,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-08-06 18:34:40,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 2477. [2021-08-06 18:34:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2466 states have (on average 1.3094079480940795) internal successors, (3229), 2476 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 3229 transitions. [2021-08-06 18:34:40,051 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 3229 transitions. Word has length 62 [2021-08-06 18:34:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:40,051 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 3229 transitions. [2021-08-06 18:34:40,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 3229 transitions. [2021-08-06 18:34:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:40,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:40,053 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:40,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 18:34:40,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:40,254 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash 232379361, now seen corresponding path program 27 times [2021-08-06 18:34:40,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:40,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137890652] [2021-08-06 18:34:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:40,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:40,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:40,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:40,338 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:40,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:40,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:40,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:40,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:40,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:40,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:40,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137890652] [2021-08-06 18:34:40,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137890652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:40,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623950052] [2021-08-06 18:34:40,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:34:40,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:40,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:40,397 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:40,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 18:34:42,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:34:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:43,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:43,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:43,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623950052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:43,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:43,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:43,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800394602] [2021-08-06 18:34:43,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:43,286 INFO L87 Difference]: Start difference. First operand 2477 states and 3229 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:44,744 INFO L93 Difference]: Finished difference Result 6357 states and 8152 transitions. [2021-08-06 18:34:44,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 18:34:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:44,749 INFO L225 Difference]: With dead ends: 6357 [2021-08-06 18:34:44,749 INFO L226 Difference]: Without dead ends: 5732 [2021-08-06 18:34:44,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 1373.9ms TimeCoverageRelationStatistics Valid=1335, Invalid=4671, Unknown=0, NotChecked=0, Total=6006 [2021-08-06 18:34:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2021-08-06 18:34:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 2521. [2021-08-06 18:34:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2521 states, 2510 states have (on average 1.3151394422310756) internal successors, (3301), 2520 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3301 transitions. [2021-08-06 18:34:44,778 INFO L78 Accepts]: Start accepts. Automaton has 2521 states and 3301 transitions. Word has length 62 [2021-08-06 18:34:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:44,778 INFO L470 AbstractCegarLoop]: Abstraction has 2521 states and 3301 transitions. [2021-08-06 18:34:44,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:44,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2521 states and 3301 transitions. [2021-08-06 18:34:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:44,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:44,781 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:44,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 18:34:44,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:44,985 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1730340433, now seen corresponding path program 28 times [2021-08-06 18:34:44,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:44,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331659699] [2021-08-06 18:34:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:44,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:45,073 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:45,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:45,094 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:45,095 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:45,108 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:45,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:45,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:45,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331659699] [2021-08-06 18:34:45,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331659699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:45,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852172475] [2021-08-06 18:34:45,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:34:45,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:45,137 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:45,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 18:34:47,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:34:47,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:47,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:47,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:47,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:34:47,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:47,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:34:47,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:47,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:47,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852172475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:47,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:47,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:47,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49301876] [2021-08-06 18:34:47,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:47,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:47,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:47,928 INFO L87 Difference]: Start difference. First operand 2521 states and 3301 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:49,101 INFO L93 Difference]: Finished difference Result 6456 states and 8246 transitions. [2021-08-06 18:34:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 18:34:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:49,109 INFO L225 Difference]: With dead ends: 6456 [2021-08-06 18:34:49,109 INFO L226 Difference]: Without dead ends: 5961 [2021-08-06 18:34:49,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 1085.0ms TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 18:34:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-08-06 18:34:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 2630. [2021-08-06 18:34:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2619 states have (on average 1.3165330278732341) internal successors, (3448), 2629 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:49,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3448 transitions. [2021-08-06 18:34:49,141 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3448 transitions. Word has length 62 [2021-08-06 18:34:49,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:49,141 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 3448 transitions. [2021-08-06 18:34:49,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3448 transitions. [2021-08-06 18:34:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:49,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:49,143 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-08-06 18:34:49,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 18:34:49,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:49,344 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1950448355, now seen corresponding path program 5 times [2021-08-06 18:34:49,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:49,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105815984] [2021-08-06 18:34:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:49,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:49,420 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:49,423 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:49,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:49,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:49,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:49,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:49,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:49,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:49,465 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:49,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:49,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:49,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:49,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:49,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105815984] [2021-08-06 18:34:49,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105815984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:49,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394209947] [2021-08-06 18:34:49,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:34:49,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:49,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:49,504 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:49,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 18:34:51,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:34:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:52,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:34:52,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:34:52,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:52,271 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:52,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394209947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:52,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:52,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:52,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759186758] [2021-08-06 18:34:52,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:52,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:52,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:52,277 INFO L87 Difference]: Start difference. First operand 2630 states and 3448 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:53,271 INFO L93 Difference]: Finished difference Result 6003 states and 7678 transitions. [2021-08-06 18:34:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 18:34:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:53,277 INFO L225 Difference]: With dead ends: 6003 [2021-08-06 18:34:53,277 INFO L226 Difference]: Without dead ends: 5423 [2021-08-06 18:34:53,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 928.3ms TimeCoverageRelationStatistics Valid=966, Invalid=3456, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 18:34:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5423 states. [2021-08-06 18:34:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5423 to 2685. [2021-08-06 18:34:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2674 states have (on average 1.3096484667165296) internal successors, (3502), 2684 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 3502 transitions. [2021-08-06 18:34:53,305 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 3502 transitions. Word has length 62 [2021-08-06 18:34:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:53,306 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 3502 transitions. [2021-08-06 18:34:53,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 3502 transitions. [2021-08-06 18:34:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:53,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:53,308 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:53,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 18:34:53,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 18:34:53,509 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:53,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1865524067, now seen corresponding path program 29 times [2021-08-06 18:34:53,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:53,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633003041] [2021-08-06 18:34:53,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:53,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:53,612 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:53,613 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:53,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:53,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:53,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:53,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:53,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633003041] [2021-08-06 18:34:53,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633003041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289193504] [2021-08-06 18:34:53,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:34:53,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:53,661 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:53,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 18:34:55,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:34:55,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:34:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:34:55,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:34:56,509 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:56,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:34:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:56,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289193504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:56,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:34:56,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:34:56,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523626534] [2021-08-06 18:34:56,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:34:56,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:34:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:34:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:34:56,515 INFO L87 Difference]: Start difference. First operand 2685 states and 3502 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:57,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:34:57,555 INFO L93 Difference]: Finished difference Result 6392 states and 8147 transitions. [2021-08-06 18:34:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 18:34:57,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:34:57,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:34:57,561 INFO L225 Difference]: With dead ends: 6392 [2021-08-06 18:34:57,561 INFO L226 Difference]: Without dead ends: 5922 [2021-08-06 18:34:57,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 961.9ms TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 18:34:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-08-06 18:34:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 2670. [2021-08-06 18:34:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 2659 states have (on average 1.313651748777736) internal successors, (3493), 2669 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 3493 transitions. [2021-08-06 18:34:57,589 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 3493 transitions. Word has length 62 [2021-08-06 18:34:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:34:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 2670 states and 3493 transitions. [2021-08-06 18:34:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:34:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 3493 transitions. [2021-08-06 18:34:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-06 18:34:57,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:34:57,591 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:34:57,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 18:34:57,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 18:34:57,792 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:34:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:34:57,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2142087767, now seen corresponding path program 30 times [2021-08-06 18:34:57,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:34:57,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625566598] [2021-08-06 18:34:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:34:57,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:34:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:34:57,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:57,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:57,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:57,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:34:57,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:57,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:34:57,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:57,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:34:57,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:57,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:34:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:34:57,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:34:57,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625566598] [2021-08-06 18:34:57,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625566598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:34:57,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79034247] [2021-08-06 18:34:57,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:34:57,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:34:57,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:34:57,919 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:34:57,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 18:35:00,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:35:00,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:35:00,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:00,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:00,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79034247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:00,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:00,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-06 18:35:00,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493094905] [2021-08-06 18:35:00,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 18:35:00,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:00,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 18:35:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:35:00,896 INFO L87 Difference]: Start difference. First operand 2670 states and 3493 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:02,083 INFO L93 Difference]: Finished difference Result 6339 states and 8071 transitions. [2021-08-06 18:35:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-06 18:35:02,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-06 18:35:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:02,090 INFO L225 Difference]: With dead ends: 6339 [2021-08-06 18:35:02,090 INFO L226 Difference]: Without dead ends: 5939 [2021-08-06 18:35:02,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1121.2ms TimeCoverageRelationStatistics Valid=1076, Invalid=4180, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 18:35:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5939 states. [2021-08-06 18:35:02,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5939 to 2680. [2021-08-06 18:35:02,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2669 states have (on average 1.3079805170475833) internal successors, (3491), 2679 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3491 transitions. [2021-08-06 18:35:02,137 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3491 transitions. Word has length 62 [2021-08-06 18:35:02,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:02,137 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 3491 transitions. [2021-08-06 18:35:02,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3491 transitions. [2021-08-06 18:35:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:02,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:02,141 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:02,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 18:35:02,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 18:35:02,357 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:02,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:02,357 INFO L82 PathProgramCache]: Analyzing trace with hash -25640116, now seen corresponding path program 31 times [2021-08-06 18:35:02,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:02,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541252602] [2021-08-06 18:35:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:02,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:02,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:02,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:02,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:02,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:02,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:02,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541252602] [2021-08-06 18:35:02,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541252602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:02,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178470126] [2021-08-06 18:35:02,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:35:02,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:02,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:02,534 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:02,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 18:35:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:04,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:05,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:05,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:05,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:05,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:05,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178470126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:05,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:05,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:05,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171598468] [2021-08-06 18:35:05,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:05,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:05,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:05,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:05,727 INFO L87 Difference]: Start difference. First operand 2680 states and 3491 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:06,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:06,070 INFO L93 Difference]: Finished difference Result 4395 states and 5609 transitions. [2021-08-06 18:35:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:35:06,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:06,075 INFO L225 Difference]: With dead ends: 4395 [2021-08-06 18:35:06,075 INFO L226 Difference]: Without dead ends: 4275 [2021-08-06 18:35:06,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:35:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-08-06 18:35:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 2725. [2021-08-06 18:35:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2714 states have (on average 1.313927781871776) internal successors, (3566), 2724 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 3566 transitions. [2021-08-06 18:35:06,103 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 3566 transitions. Word has length 67 [2021-08-06 18:35:06,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:06,103 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 3566 transitions. [2021-08-06 18:35:06,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 3566 transitions. [2021-08-06 18:35:06,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:06,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:06,106 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, 1, 1] [2021-08-06 18:35:06,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 18:35:06,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-06 18:35:06,307 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:06,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:06,307 INFO L82 PathProgramCache]: Analyzing trace with hash 600625360, now seen corresponding path program 32 times [2021-08-06 18:35:06,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:06,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441311890] [2021-08-06 18:35:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:06,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:06,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:06,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:06,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:06,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:06,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:06,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441311890] [2021-08-06 18:35:06,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441311890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:06,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678007257] [2021-08-06 18:35:06,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:35:06,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:06,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:06,470 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:06,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 18:35:08,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:35:08,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:08,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:08,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:09,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:09,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:09,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:09,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:09,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678007257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:09,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:09,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:09,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711063008] [2021-08-06 18:35:09,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:09,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:09,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:09,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:09,893 INFO L87 Difference]: Start difference. First operand 2725 states and 3566 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:10,438 INFO L93 Difference]: Finished difference Result 4849 states and 6168 transitions. [2021-08-06 18:35:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:35:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:10,445 INFO L225 Difference]: With dead ends: 4849 [2021-08-06 18:35:10,445 INFO L226 Difference]: Without dead ends: 4679 [2021-08-06 18:35:10,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:35:10,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2021-08-06 18:35:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 2770. [2021-08-06 18:35:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2770 states, 2759 states have (on average 1.310982239942008) internal successors, (3617), 2769 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2770 states to 2770 states and 3617 transitions. [2021-08-06 18:35:10,481 INFO L78 Accepts]: Start accepts. Automaton has 2770 states and 3617 transitions. Word has length 67 [2021-08-06 18:35:10,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:10,481 INFO L470 AbstractCegarLoop]: Abstraction has 2770 states and 3617 transitions. [2021-08-06 18:35:10,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2770 states and 3617 transitions. [2021-08-06 18:35:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:10,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:10,483 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, 1, 1] [2021-08-06 18:35:10,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 18:35:10,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 18:35:10,685 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2061591950, now seen corresponding path program 33 times [2021-08-06 18:35:10,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:10,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064451910] [2021-08-06 18:35:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:10,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:10,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:10,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:10,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:10,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:10,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:10,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064451910] [2021-08-06 18:35:10,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064451910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:10,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194286440] [2021-08-06 18:35:10,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:35:10,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:10,850 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:10,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 18:35:13,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:35:13,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:13,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:13,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:14,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:14,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:14,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194286440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:14,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:14,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:14,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985542315] [2021-08-06 18:35:14,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:14,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:14,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:14,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:14,249 INFO L87 Difference]: Start difference. First operand 2770 states and 3617 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:14,827 INFO L93 Difference]: Finished difference Result 5159 states and 6559 transitions. [2021-08-06 18:35:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:35:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:14,833 INFO L225 Difference]: With dead ends: 5159 [2021-08-06 18:35:14,833 INFO L226 Difference]: Without dead ends: 4939 [2021-08-06 18:35:14,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:35:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2021-08-06 18:35:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 2865. [2021-08-06 18:35:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2854 states have (on average 1.306937631394534) internal successors, (3730), 2864 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3730 transitions. [2021-08-06 18:35:14,869 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3730 transitions. Word has length 67 [2021-08-06 18:35:14,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:14,869 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 3730 transitions. [2021-08-06 18:35:14,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:14,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3730 transitions. [2021-08-06 18:35:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:14,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:14,873 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, 1, 1] [2021-08-06 18:35:14,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:15,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 18:35:15,097 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:15,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:15,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1721183744, now seen corresponding path program 34 times [2021-08-06 18:35:15,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:15,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814710438] [2021-08-06 18:35:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:15,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:15,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:15,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:15,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:15,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:15,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:15,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814710438] [2021-08-06 18:35:15,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814710438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:15,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136486372] [2021-08-06 18:35:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:35:15,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:15,319 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:15,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 18:35:17,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:35:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:17,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:17,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:18,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:18,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:18,741 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:18,742 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:18,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136486372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:18,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:18,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:18,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111954852] [2021-08-06 18:35:18,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:18,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:18,748 INFO L87 Difference]: Start difference. First operand 2865 states and 3730 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:19,313 INFO L93 Difference]: Finished difference Result 5079 states and 6455 transitions. [2021-08-06 18:35:19,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:35:19,313 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:19,318 INFO L225 Difference]: With dead ends: 5079 [2021-08-06 18:35:19,319 INFO L226 Difference]: Without dead ends: 4859 [2021-08-06 18:35:19,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:35:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2021-08-06 18:35:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 2870. [2021-08-06 18:35:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2859 states have (on average 1.3084994753410284) internal successors, (3741), 2869 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3741 transitions. [2021-08-06 18:35:19,348 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3741 transitions. Word has length 67 [2021-08-06 18:35:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:19,348 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 3741 transitions. [2021-08-06 18:35:19,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3741 transitions. [2021-08-06 18:35:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:19,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:19,351 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:19,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 18:35:19,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:19,552 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:19,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1781882386, now seen corresponding path program 35 times [2021-08-06 18:35:19,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:19,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081791268] [2021-08-06 18:35:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:19,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:19,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:19,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:19,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:19,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:19,698 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:19,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:19,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081791268] [2021-08-06 18:35:19,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081791268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:19,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023027441] [2021-08-06 18:35:19,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:35:19,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:19,699 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:19,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 18:35:22,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:35:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:22,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:22,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:22,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:23,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:23,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:23,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023027441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:23,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:23,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:23,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390758165] [2021-08-06 18:35:23,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:23,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:23,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:23,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:23,153 INFO L87 Difference]: Start difference. First operand 2870 states and 3741 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:23,795 INFO L93 Difference]: Finished difference Result 5194 states and 6609 transitions. [2021-08-06 18:35:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:35:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:23,800 INFO L225 Difference]: With dead ends: 5194 [2021-08-06 18:35:23,800 INFO L226 Difference]: Without dead ends: 4924 [2021-08-06 18:35:23,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:35:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4924 states. [2021-08-06 18:35:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4924 to 2949. [2021-08-06 18:35:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2938 states have (on average 1.3049693669162696) internal successors, (3834), 2948 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3834 transitions. [2021-08-06 18:35:23,829 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3834 transitions. Word has length 67 [2021-08-06 18:35:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:23,829 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 3834 transitions. [2021-08-06 18:35:23,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3834 transitions. [2021-08-06 18:35:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:23,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:23,832 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, 1, 1] [2021-08-06 18:35:23,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 18:35:24,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:24,033 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1441474180, now seen corresponding path program 36 times [2021-08-06 18:35:24,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:24,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946222599] [2021-08-06 18:35:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:24,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:24,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:24,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:24,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:24,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:24,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:24,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946222599] [2021-08-06 18:35:24,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946222599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:24,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332568184] [2021-08-06 18:35:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:35:24,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:24,197 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:24,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 18:35:26,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:35:26,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:27,053 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:27,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:27,700 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:27,701 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:27,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332568184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:27,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:27,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:27,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893866627] [2021-08-06 18:35:27,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:27,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:27,706 INFO L87 Difference]: Start difference. First operand 2949 states and 3834 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:28,399 INFO L93 Difference]: Finished difference Result 5410 states and 6856 transitions. [2021-08-06 18:35:28,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:35:28,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:28,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:28,405 INFO L225 Difference]: With dead ends: 5410 [2021-08-06 18:35:28,405 INFO L226 Difference]: Without dead ends: 5190 [2021-08-06 18:35:28,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 704.7ms TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:35:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-08-06 18:35:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 3044. [2021-08-06 18:35:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3033 states have (on average 1.309264754368612) internal successors, (3971), 3043 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 3971 transitions. [2021-08-06 18:35:28,439 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 3971 transitions. Word has length 67 [2021-08-06 18:35:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:28,439 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 3971 transitions. [2021-08-06 18:35:28,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 3971 transitions. [2021-08-06 18:35:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:28,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:28,442 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, 1, 1] [2021-08-06 18:35:28,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 18:35:28,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:28,642 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:28,643 INFO L82 PathProgramCache]: Analyzing trace with hash -479182564, now seen corresponding path program 37 times [2021-08-06 18:35:28,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:28,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602819678] [2021-08-06 18:35:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:28,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:28,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:28,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:28,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:28,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:28,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:28,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602819678] [2021-08-06 18:35:28,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602819678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:28,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613348094] [2021-08-06 18:35:28,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:35:28,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:28,817 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:28,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 18:35:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:31,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:31,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:31,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:31,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:32,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:32,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:32,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613348094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:32,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:32,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:32,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889850653] [2021-08-06 18:35:32,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:32,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:32,371 INFO L87 Difference]: Start difference. First operand 3044 states and 3971 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:33,058 INFO L93 Difference]: Finished difference Result 5273 states and 6697 transitions. [2021-08-06 18:35:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:35:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:33,064 INFO L225 Difference]: With dead ends: 5273 [2021-08-06 18:35:33,064 INFO L226 Difference]: Without dead ends: 5053 [2021-08-06 18:35:33,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:35:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-08-06 18:35:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 3019. [2021-08-06 18:35:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3008 states have (on average 1.309840425531915) internal successors, (3940), 3018 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3940 transitions. [2021-08-06 18:35:33,094 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3940 transitions. Word has length 67 [2021-08-06 18:35:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:33,094 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3940 transitions. [2021-08-06 18:35:33,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3940 transitions. [2021-08-06 18:35:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:33,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:33,097 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:33,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 18:35:33,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-06 18:35:33,298 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -918315822, now seen corresponding path program 38 times [2021-08-06 18:35:33,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:33,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297874231] [2021-08-06 18:35:33,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:33,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:33,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:33,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:33,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:33,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:33,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:33,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297874231] [2021-08-06 18:35:33,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297874231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:33,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033833086] [2021-08-06 18:35:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:35:33,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:33,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:33,465 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:33,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 18:35:36,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:35:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:36,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:36,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:36,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:37,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:37,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:37,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033833086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:37,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:37,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:37,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91806296] [2021-08-06 18:35:37,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:37,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:37,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:37,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:37,026 INFO L87 Difference]: Start difference. First operand 3019 states and 3940 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:37,696 INFO L93 Difference]: Finished difference Result 5108 states and 6507 transitions. [2021-08-06 18:35:37,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 18:35:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:37,704 INFO L225 Difference]: With dead ends: 5108 [2021-08-06 18:35:37,704 INFO L226 Difference]: Without dead ends: 4838 [2021-08-06 18:35:37,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=655, Invalid=1895, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 18:35:37,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2021-08-06 18:35:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 2969. [2021-08-06 18:35:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2958 states have (on average 1.3110209601081813) internal successors, (3878), 2968 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 3878 transitions. [2021-08-06 18:35:37,746 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 3878 transitions. Word has length 67 [2021-08-06 18:35:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:37,746 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 3878 transitions. [2021-08-06 18:35:37,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 3878 transitions. [2021-08-06 18:35:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:37,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:37,750 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:37,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:37,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 18:35:37,977 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1614494906, now seen corresponding path program 39 times [2021-08-06 18:35:37,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:37,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755546242] [2021-08-06 18:35:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:37,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:38,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:38,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:38,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:38,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:38,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:38,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755546242] [2021-08-06 18:35:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755546242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:38,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088078353] [2021-08-06 18:35:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:35:38,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:38,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:38,153 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 18:35:41,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:35:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:41,215 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:41,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:41,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:41,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:41,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088078353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:41,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:41,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:41,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337484391] [2021-08-06 18:35:41,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:41,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:41,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:41,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:41,807 INFO L87 Difference]: Start difference. First operand 2969 states and 3878 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:42,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:42,336 INFO L93 Difference]: Finished difference Result 4753 states and 6039 transitions. [2021-08-06 18:35:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:35:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:42,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:42,342 INFO L225 Difference]: With dead ends: 4753 [2021-08-06 18:35:42,342 INFO L226 Difference]: Without dead ends: 4633 [2021-08-06 18:35:42,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=491, Invalid=1401, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:35:42,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-08-06 18:35:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 2969. [2021-08-06 18:35:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2958 states have (on average 1.3110209601081813) internal successors, (3878), 2968 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 3878 transitions. [2021-08-06 18:35:42,371 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 3878 transitions. Word has length 67 [2021-08-06 18:35:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:42,371 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 3878 transitions. [2021-08-06 18:35:42,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 3878 transitions. [2021-08-06 18:35:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:42,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:42,373 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:42,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 18:35:42,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:42,574 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:42,574 INFO L82 PathProgramCache]: Analyzing trace with hash 56416704, now seen corresponding path program 40 times [2021-08-06 18:35:42,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:42,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729006906] [2021-08-06 18:35:42,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:42,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:42,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:42,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:42,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:42,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:42,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:42,699 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:42,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:42,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729006906] [2021-08-06 18:35:42,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729006906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:42,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847559364] [2021-08-06 18:35:42,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:35:42,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:42,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:42,727 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:42,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 18:35:45,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:35:45,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:45,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:45,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:45,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:45,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:46,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:46,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:46,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847559364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:46,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:46,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:46,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898384618] [2021-08-06 18:35:46,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:46,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:46,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:46,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:46,392 INFO L87 Difference]: Start difference. First operand 2969 states and 3878 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:46,898 INFO L93 Difference]: Finished difference Result 5000 states and 6354 transitions. [2021-08-06 18:35:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:35:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:46,902 INFO L225 Difference]: With dead ends: 5000 [2021-08-06 18:35:46,903 INFO L226 Difference]: Without dead ends: 4780 [2021-08-06 18:35:46,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:35:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4780 states. [2021-08-06 18:35:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4780 to 3019. [2021-08-06 18:35:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3008 states have (on average 1.309840425531915) internal successors, (3940), 3018 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3940 transitions. [2021-08-06 18:35:46,927 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3940 transitions. Word has length 67 [2021-08-06 18:35:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:46,927 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3940 transitions. [2021-08-06 18:35:46,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3940 transitions. [2021-08-06 18:35:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:46,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:46,929 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:46,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 18:35:47,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:47,130 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1864240040, now seen corresponding path program 41 times [2021-08-06 18:35:47,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:47,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760291709] [2021-08-06 18:35:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:47,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:47,175 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:47,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:47,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:47,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:47,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:47,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:47,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:47,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760291709] [2021-08-06 18:35:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760291709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:47,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212725418] [2021-08-06 18:35:47,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:35:47,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:47,280 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:47,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 18:35:50,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:35:50,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:50,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:50,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:51,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:51,075 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:51,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212725418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:51,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:51,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:51,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567334005] [2021-08-06 18:35:51,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:51,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:51,080 INFO L87 Difference]: Start difference. First operand 3019 states and 3940 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:51,603 INFO L93 Difference]: Finished difference Result 5158 states and 6548 transitions. [2021-08-06 18:35:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 18:35:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:51,609 INFO L225 Difference]: With dead ends: 5158 [2021-08-06 18:35:51,609 INFO L226 Difference]: Without dead ends: 4938 [2021-08-06 18:35:51,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=489, Invalid=1317, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 18:35:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-08-06 18:35:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 2994. [2021-08-06 18:35:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2983 states have (on average 1.3104257458933959) internal successors, (3909), 2993 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3909 transitions. [2021-08-06 18:35:51,643 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3909 transitions. Word has length 67 [2021-08-06 18:35:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:51,643 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 3909 transitions. [2021-08-06 18:35:51,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3909 transitions. [2021-08-06 18:35:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:51,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:51,646 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:35:51,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 18:35:51,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 18:35:51,857 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:51,857 INFO L82 PathProgramCache]: Analyzing trace with hash 266188992, now seen corresponding path program 42 times [2021-08-06 18:35:51,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:51,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588293587] [2021-08-06 18:35:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:51,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:51,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:51,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:51,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:51,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:51,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:51,977 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:52,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:52,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588293587] [2021-08-06 18:35:52,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588293587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:52,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330647728] [2021-08-06 18:35:52,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:35:52,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:52,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:52,015 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:52,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 18:35:55,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 18:35:55,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:35:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:55,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:35:55,292 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:55,293 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:35:55,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:55,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:35:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330647728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:55,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:35:55,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:35:55,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549817307] [2021-08-06 18:35:55,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:35:55,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:35:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:35:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:35:55,858 INFO L87 Difference]: Start difference. First operand 2994 states and 3909 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:35:56,473 INFO L93 Difference]: Finished difference Result 5199 states and 6591 transitions. [2021-08-06 18:35:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:35:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:35:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:35:56,478 INFO L225 Difference]: With dead ends: 5199 [2021-08-06 18:35:56,479 INFO L226 Difference]: Without dead ends: 4979 [2021-08-06 18:35:56,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 619.4ms TimeCoverageRelationStatistics Valid=548, Invalid=1522, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 18:35:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-08-06 18:35:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3019. [2021-08-06 18:35:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3008 states have (on average 1.309840425531915) internal successors, (3940), 3018 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3940 transitions. [2021-08-06 18:35:56,509 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3940 transitions. Word has length 67 [2021-08-06 18:35:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:35:56,509 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3940 transitions. [2021-08-06 18:35:56,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:35:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3940 transitions. [2021-08-06 18:35:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:35:56,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:35:56,511 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, 1, 1] [2021-08-06 18:35:56,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 18:35:56,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 18:35:56,712 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:35:56,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:35:56,712 INFO L82 PathProgramCache]: Analyzing trace with hash 604424116, now seen corresponding path program 43 times [2021-08-06 18:35:56,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:35:56,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854509282] [2021-08-06 18:35:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:35:56,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:35:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:56,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:56,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:35:56,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:56,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:35:56,830 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:56,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:35:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:35:56,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:35:56,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854509282] [2021-08-06 18:35:56,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854509282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:35:56,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882663452] [2021-08-06 18:35:56,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:35:56,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:35:56,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:35:56,857 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:35:56,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 18:35:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:35:59,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:35:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:00,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:00,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:00,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:00,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:00,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:00,722 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:00,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882663452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:00,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:00,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:00,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66799850] [2021-08-06 18:36:00,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:00,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:00,727 INFO L87 Difference]: Start difference. First operand 3019 states and 3940 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:01,208 INFO L93 Difference]: Finished difference Result 5258 states and 6651 transitions. [2021-08-06 18:36:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:36:01,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:01,214 INFO L225 Difference]: With dead ends: 5258 [2021-08-06 18:36:01,214 INFO L226 Difference]: Without dead ends: 5088 [2021-08-06 18:36:01,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:36:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-08-06 18:36:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 2969. [2021-08-06 18:36:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2969 states, 2958 states have (on average 1.3110209601081813) internal successors, (3878), 2968 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 3878 transitions. [2021-08-06 18:36:01,247 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 3878 transitions. Word has length 67 [2021-08-06 18:36:01,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:01,247 INFO L470 AbstractCegarLoop]: Abstraction has 2969 states and 3878 transitions. [2021-08-06 18:36:01,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 3878 transitions. [2021-08-06 18:36:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:01,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:01,250 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, 1, 1] [2021-08-06 18:36:01,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 18:36:01,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:01,457 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash -247626676, now seen corresponding path program 44 times [2021-08-06 18:36:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:01,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628360327] [2021-08-06 18:36:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:01,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:01,502 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:36:01,503 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:36:01,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:36:01,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:36:01,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:01,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:01,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:01,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628360327] [2021-08-06 18:36:01,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628360327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:01,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476326985] [2021-08-06 18:36:01,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:36:01,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:01,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:01,612 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:01,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 18:36:04,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:36:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:04,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:04,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:05,661 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:05,662 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:05,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476326985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:05,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:05,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:05,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119495132] [2021-08-06 18:36:05,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:05,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:05,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:05,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:05,669 INFO L87 Difference]: Start difference. First operand 2969 states and 3878 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:06,179 INFO L93 Difference]: Finished difference Result 5043 states and 6386 transitions. [2021-08-06 18:36:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:36:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:06,184 INFO L225 Difference]: With dead ends: 5043 [2021-08-06 18:36:06,184 INFO L226 Difference]: Without dead ends: 4873 [2021-08-06 18:36:06,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:36:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-08-06 18:36:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 2999. [2021-08-06 18:36:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2988 states have (on average 1.3119143239625168) internal successors, (3920), 2998 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 3920 transitions. [2021-08-06 18:36:06,212 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 3920 transitions. Word has length 67 [2021-08-06 18:36:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:06,212 INFO L470 AbstractCegarLoop]: Abstraction has 2999 states and 3920 transitions. [2021-08-06 18:36:06,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 3920 transitions. [2021-08-06 18:36:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:06,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:06,215 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, 1, 1] [2021-08-06 18:36:06,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 18:36:06,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 18:36:06,417 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2126683876, now seen corresponding path program 45 times [2021-08-06 18:36:06,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:06,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123330382] [2021-08-06 18:36:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:06,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:06,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:36:06,466 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:36:06,478 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:36:06,479 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:36:06,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:06,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:06,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:06,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123330382] [2021-08-06 18:36:06,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123330382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:06,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041327680] [2021-08-06 18:36:06,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:36:06,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:06,582 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:06,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 18:36:09,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:36:09,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:10,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:10,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:36:10,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:10,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:10,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041327680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:10,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:10,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:10,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520188820] [2021-08-06 18:36:10,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:10,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:10,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:10,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:10,628 INFO L87 Difference]: Start difference. First operand 2999 states and 3920 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:11,116 INFO L93 Difference]: Finished difference Result 5027 states and 6366 transitions. [2021-08-06 18:36:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:36:11,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:11,121 INFO L225 Difference]: With dead ends: 5027 [2021-08-06 18:36:11,121 INFO L226 Difference]: Without dead ends: 4857 [2021-08-06 18:36:11,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:36:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-08-06 18:36:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 2949. [2021-08-06 18:36:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2938 states have (on average 1.3049693669162696) internal successors, (3834), 2948 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3834 transitions. [2021-08-06 18:36:11,147 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3834 transitions. Word has length 67 [2021-08-06 18:36:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:11,147 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 3834 transitions. [2021-08-06 18:36:11,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3834 transitions. [2021-08-06 18:36:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:11,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:11,149 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:11,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 18:36:11,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:11,350 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:11,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1683521294, now seen corresponding path program 46 times [2021-08-06 18:36:11,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:11,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201877915] [2021-08-06 18:36:11,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:11,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:11,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:11,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:11,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:11,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:11,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:11,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:11,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:11,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201877915] [2021-08-06 18:36:11,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201877915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:11,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564447815] [2021-08-06 18:36:11,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:36:11,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:11,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:11,498 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:11,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 18:36:14,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:36:14,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:14,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:14,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:15,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:15,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:15,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564447815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:15,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:15,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:15,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113776235] [2021-08-06 18:36:15,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:15,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:15,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:15,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:15,494 INFO L87 Difference]: Start difference. First operand 2949 states and 3834 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:16,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:16,441 INFO L93 Difference]: Finished difference Result 5984 states and 7586 transitions. [2021-08-06 18:36:16,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 18:36:16,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:16,447 INFO L225 Difference]: With dead ends: 5984 [2021-08-06 18:36:16,447 INFO L226 Difference]: Without dead ends: 5794 [2021-08-06 18:36:16,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 947.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2773, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 18:36:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2021-08-06 18:36:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 3064. [2021-08-06 18:36:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 3053 states have (on average 1.3072387815263675) internal successors, (3991), 3063 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 3991 transitions. [2021-08-06 18:36:16,479 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 3991 transitions. Word has length 67 [2021-08-06 18:36:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:16,479 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 3991 transitions. [2021-08-06 18:36:16,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:16,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 3991 transitions. [2021-08-06 18:36:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:16,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:16,481 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, 1, 1] [2021-08-06 18:36:16,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 18:36:16,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:16,682 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash -377085430, now seen corresponding path program 47 times [2021-08-06 18:36:16,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:16,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619096090] [2021-08-06 18:36:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:16,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:16,790 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:16,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:16,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:16,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:16,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:16,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:16,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:16,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619096090] [2021-08-06 18:36:16,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619096090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:16,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332665960] [2021-08-06 18:36:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:36:16,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:16,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:16,854 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:16,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 18:36:20,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:36:20,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:20,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:20,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:21,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:21,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:21,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332665960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:21,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:21,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:21,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279945009] [2021-08-06 18:36:21,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:21,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:21,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:21,020 INFO L87 Difference]: Start difference. First operand 3064 states and 3991 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:22,410 INFO L93 Difference]: Finished difference Result 6967 states and 8840 transitions. [2021-08-06 18:36:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 18:36:22,411 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:22,417 INFO L225 Difference]: With dead ends: 6967 [2021-08-06 18:36:22,418 INFO L226 Difference]: Without dead ends: 6587 [2021-08-06 18:36:22,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1354.0ms TimeCoverageRelationStatistics Valid=1116, Invalid=3996, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 18:36:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2021-08-06 18:36:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 3119. [2021-08-06 18:36:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3119 states, 3108 states have (on average 1.3075933075933075) internal successors, (4064), 3118 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 4064 transitions. [2021-08-06 18:36:22,452 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 4064 transitions. Word has length 67 [2021-08-06 18:36:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:22,452 INFO L470 AbstractCegarLoop]: Abstraction has 3119 states and 4064 transitions. [2021-08-06 18:36:22,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 4064 transitions. [2021-08-06 18:36:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:22,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:22,454 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:22,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 18:36:22,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-06 18:36:22,655 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:22,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:22,655 INFO L82 PathProgramCache]: Analyzing trace with hash -93644074, now seen corresponding path program 48 times [2021-08-06 18:36:22,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:22,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420851423] [2021-08-06 18:36:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:22,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:22,754 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:22,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:22,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:22,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:22,781 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:22,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:22,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:22,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420851423] [2021-08-06 18:36:22,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420851423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:22,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707407340] [2021-08-06 18:36:22,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:36:22,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:22,807 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:22,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 18:36:26,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:36:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:26,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:26,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:26,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:26,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:26,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707407340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:26,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:26,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:26,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421615441] [2021-08-06 18:36:26,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:26,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:26,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:26,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:26,986 INFO L87 Difference]: Start difference. First operand 3119 states and 4064 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:28,353 INFO L93 Difference]: Finished difference Result 6294 states and 7950 transitions. [2021-08-06 18:36:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 18:36:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:28,359 INFO L225 Difference]: With dead ends: 6294 [2021-08-06 18:36:28,359 INFO L226 Difference]: Without dead ends: 6189 [2021-08-06 18:36:28,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1317.8ms TimeCoverageRelationStatistics Valid=965, Invalid=3325, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 18:36:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6189 states. [2021-08-06 18:36:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6189 to 3114. [2021-08-06 18:36:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 3103 states have (on average 1.309700290041895) internal successors, (4064), 3113 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 4064 transitions. [2021-08-06 18:36:28,392 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 4064 transitions. Word has length 67 [2021-08-06 18:36:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:28,392 INFO L470 AbstractCegarLoop]: Abstraction has 3114 states and 4064 transitions. [2021-08-06 18:36:28,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 4064 transitions. [2021-08-06 18:36:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:28,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:28,395 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, 1, 1] [2021-08-06 18:36:28,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 18:36:28,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:28,595 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1215103858, now seen corresponding path program 49 times [2021-08-06 18:36:28,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:28,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251382840] [2021-08-06 18:36:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:28,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:28,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:28,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:28,706 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:28,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:28,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:28,720 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:28,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:28,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251382840] [2021-08-06 18:36:28,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251382840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:28,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709208517] [2021-08-06 18:36:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:36:28,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:28,746 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:28,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 18:36:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:32,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:32,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:32,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:32,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709208517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:32,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:32,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:32,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328199447] [2021-08-06 18:36:32,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:32,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:32,905 INFO L87 Difference]: Start difference. First operand 3114 states and 4064 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:34,474 INFO L93 Difference]: Finished difference Result 6913 states and 8798 transitions. [2021-08-06 18:36:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-06 18:36:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:34,482 INFO L225 Difference]: With dead ends: 6913 [2021-08-06 18:36:34,482 INFO L226 Difference]: Without dead ends: 6513 [2021-08-06 18:36:34,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 1496.8ms TimeCoverageRelationStatistics Valid=1267, Invalid=4585, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 18:36:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6513 states. [2021-08-06 18:36:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6513 to 3219. [2021-08-06 18:36:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3208 states have (on average 1.3089152119700749) internal successors, (4199), 3218 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 4199 transitions. [2021-08-06 18:36:34,519 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 4199 transitions. Word has length 67 [2021-08-06 18:36:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 3219 states and 4199 transitions. [2021-08-06 18:36:34,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 4199 transitions. [2021-08-06 18:36:34,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:34,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:34,522 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, 1, 1] [2021-08-06 18:36:34,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 18:36:34,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:34,722 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:34,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1467950542, now seen corresponding path program 50 times [2021-08-06 18:36:34,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:34,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793695161] [2021-08-06 18:36:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:34,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:34,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:34,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:34,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:34,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:34,828 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:34,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:34,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:34,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:34,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:34,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793695161] [2021-08-06 18:36:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793695161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:34,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480326899] [2021-08-06 18:36:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:36:34,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:34,867 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:34,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 18:36:38,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:36:38,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:38,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:38,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:39,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:39,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:39,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480326899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:39,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:39,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:39,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541838347] [2021-08-06 18:36:39,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:39,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:39,157 INFO L87 Difference]: Start difference. First operand 3219 states and 4199 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:41,050 INFO L93 Difference]: Finished difference Result 7507 states and 9527 transitions. [2021-08-06 18:36:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 18:36:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:41,059 INFO L225 Difference]: With dead ends: 7507 [2021-08-06 18:36:41,059 INFO L226 Difference]: Without dead ends: 7087 [2021-08-06 18:36:41,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 1794.8ms TimeCoverageRelationStatistics Valid=1434, Invalid=5208, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 18:36:41,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2021-08-06 18:36:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 3254. [2021-08-06 18:36:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3243 states have (on average 1.311131668208449) internal successors, (4252), 3253 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 4252 transitions. [2021-08-06 18:36:41,109 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 4252 transitions. Word has length 67 [2021-08-06 18:36:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:41,109 INFO L470 AbstractCegarLoop]: Abstraction has 3254 states and 4252 transitions. [2021-08-06 18:36:41,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 4252 transitions. [2021-08-06 18:36:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:41,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:41,112 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, 1, 1] [2021-08-06 18:36:41,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 18:36:41,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:41,313 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash -494769252, now seen corresponding path program 51 times [2021-08-06 18:36:41,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:41,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274833795] [2021-08-06 18:36:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:41,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:41,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:41,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:41,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:41,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:41,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:41,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:41,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:41,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274833795] [2021-08-06 18:36:41,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274833795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:41,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669906601] [2021-08-06 18:36:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:36:41,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:41,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:41,481 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:41,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 18:36:45,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:36:45,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:45,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:45,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669906601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:45,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:45,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692056101] [2021-08-06 18:36:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:45,820 INFO L87 Difference]: Start difference. First operand 3254 states and 4252 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:47,534 INFO L93 Difference]: Finished difference Result 7712 states and 9854 transitions. [2021-08-06 18:36:47,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-06 18:36:47,534 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:47,542 INFO L225 Difference]: With dead ends: 7712 [2021-08-06 18:36:47,542 INFO L226 Difference]: Without dead ends: 7222 [2021-08-06 18:36:47,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 1611.4ms TimeCoverageRelationStatistics Valid=1381, Invalid=5099, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 18:36:47,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2021-08-06 18:36:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 3274. [2021-08-06 18:36:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3274 states, 3263 states have (on average 1.3092246399019307) internal successors, (4272), 3273 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3274 states to 3274 states and 4272 transitions. [2021-08-06 18:36:47,580 INFO L78 Accepts]: Start accepts. Automaton has 3274 states and 4272 transitions. Word has length 67 [2021-08-06 18:36:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:47,580 INFO L470 AbstractCegarLoop]: Abstraction has 3274 states and 4272 transitions. [2021-08-06 18:36:47,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3274 states and 4272 transitions. [2021-08-06 18:36:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:47,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:47,583 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:47,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 18:36:47,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 18:36:47,783 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:47,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:47,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1296165750, now seen corresponding path program 52 times [2021-08-06 18:36:47,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:47,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354120268] [2021-08-06 18:36:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:47,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:47,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:47,885 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:36:47,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:47,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:47,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:47,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:47,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:47,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354120268] [2021-08-06 18:36:47,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354120268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:47,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085334916] [2021-08-06 18:36:47,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:36:47,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:47,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:47,945 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:47,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 18:36:51,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:36:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:52,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:52,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:52,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085334916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:52,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:52,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:52,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266530674] [2021-08-06 18:36:52,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:52,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:52,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:52,299 INFO L87 Difference]: Start difference. First operand 3274 states and 4272 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:36:54,048 INFO L93 Difference]: Finished difference Result 7247 states and 9269 transitions. [2021-08-06 18:36:54,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 18:36:54,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:36:54,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:36:54,056 INFO L225 Difference]: With dead ends: 7247 [2021-08-06 18:36:54,056 INFO L226 Difference]: Without dead ends: 6592 [2021-08-06 18:36:54,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 1660.2ms TimeCoverageRelationStatistics Valid=1636, Invalid=5846, Unknown=0, NotChecked=0, Total=7482 [2021-08-06 18:36:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6592 states. [2021-08-06 18:36:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6592 to 3439. [2021-08-06 18:36:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3428 states have (on average 1.3057176196032672) internal successors, (4476), 3438 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 4476 transitions. [2021-08-06 18:36:54,093 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 4476 transitions. Word has length 67 [2021-08-06 18:36:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:36:54,093 INFO L470 AbstractCegarLoop]: Abstraction has 3439 states and 4476 transitions. [2021-08-06 18:36:54,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:36:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 4476 transitions. [2021-08-06 18:36:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:36:54,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:36:54,096 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:36:54,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 18:36:54,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:54,313 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:36:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:36:54,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1386888650, now seen corresponding path program 53 times [2021-08-06 18:36:54,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:36:54,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747139269] [2021-08-06 18:36:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:36:54,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:36:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:36:54,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:54,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:36:54,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:54,412 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:36:54,424 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:54,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:36:54,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:54,438 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:36:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:54,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:36:54,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747139269] [2021-08-06 18:36:54,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747139269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:54,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630659339] [2021-08-06 18:36:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:36:54,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:36:54,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:36:54,464 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:36:54,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 18:36:58,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:36:58,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:36:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:36:58,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:36:58,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:58,885 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:36:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:36:58,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630659339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:36:58,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:36:58,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:36:58,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789589006] [2021-08-06 18:36:58,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:36:58,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:36:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:36:58,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:36:58,890 INFO L87 Difference]: Start difference. First operand 3439 states and 4476 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:00,824 INFO L93 Difference]: Finished difference Result 8308 states and 10592 transitions. [2021-08-06 18:37:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 18:37:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:00,832 INFO L225 Difference]: With dead ends: 8308 [2021-08-06 18:37:00,832 INFO L226 Difference]: Without dead ends: 7733 [2021-08-06 18:37:00,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 1796.1ms TimeCoverageRelationStatistics Valid=1576, Invalid=5396, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 18:37:00,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7733 states. [2021-08-06 18:37:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7733 to 3424. [2021-08-06 18:37:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3413 states have (on average 1.3088192206270144) internal successors, (4467), 3423 states have internal predecessors, (4467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 4467 transitions. [2021-08-06 18:37:00,872 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 4467 transitions. Word has length 67 [2021-08-06 18:37:00,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:00,872 INFO L470 AbstractCegarLoop]: Abstraction has 3424 states and 4467 transitions. [2021-08-06 18:37:00,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 4467 transitions. [2021-08-06 18:37:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:00,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:00,875 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, 1, 1] [2021-08-06 18:37:00,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 18:37:01,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:01,076 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -575831144, now seen corresponding path program 54 times [2021-08-06 18:37:01,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:01,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385392086] [2021-08-06 18:37:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:01,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:01,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:01,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:01,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:01,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:01,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:01,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:01,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:01,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385392086] [2021-08-06 18:37:01,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385392086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:01,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384633948] [2021-08-06 18:37:01,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:37:01,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:01,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:01,232 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:01,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 18:37:04,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:37:04,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:04,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:04,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:05,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:05,728 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:05,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384633948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:05,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:05,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:05,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065097069] [2021-08-06 18:37:05,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:05,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:05,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:05,733 INFO L87 Difference]: Start difference. First operand 3424 states and 4467 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:07,638 INFO L93 Difference]: Finished difference Result 8479 states and 10819 transitions. [2021-08-06 18:37:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-06 18:37:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:07,647 INFO L225 Difference]: With dead ends: 8479 [2021-08-06 18:37:07,647 INFO L226 Difference]: Without dead ends: 7984 [2021-08-06 18:37:07,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 1746.0ms TimeCoverageRelationStatistics Valid=1763, Invalid=6247, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 18:37:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7984 states. [2021-08-06 18:37:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7984 to 3514. [2021-08-06 18:37:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3503 states have (on average 1.3111618612617757) internal successors, (4593), 3513 states have internal predecessors, (4593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 4593 transitions. [2021-08-06 18:37:07,692 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 4593 transitions. Word has length 67 [2021-08-06 18:37:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:07,692 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 4593 transitions. [2021-08-06 18:37:07,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 4593 transitions. [2021-08-06 18:37:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:07,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:07,710 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:07,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 18:37:07,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-08-06 18:37:07,910 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash -714877174, now seen corresponding path program 55 times [2021-08-06 18:37:07,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:07,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826522104] [2021-08-06 18:37:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:07,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:07,974 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:07,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:07,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:07,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:07,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:08,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:08,012 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:08,013 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:08,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:08,025 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:08,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:08,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:08,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:08,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826522104] [2021-08-06 18:37:08,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826522104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:08,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944591275] [2021-08-06 18:37:08,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:37:08,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:08,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:08,064 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:08,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 18:37:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:12,485 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:37:12,486 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 53.8 percent of original size [2021-08-06 18:37:12,540 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:12,540 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:12,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944591275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:12,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:12,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:12,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889544915] [2021-08-06 18:37:12,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:12,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:12,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:12,546 INFO L87 Difference]: Start difference. First operand 3514 states and 4593 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:14,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:14,478 INFO L93 Difference]: Finished difference Result 8499 states and 10824 transitions. [2021-08-06 18:37:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-06 18:37:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:14,487 INFO L225 Difference]: With dead ends: 8499 [2021-08-06 18:37:14,488 INFO L226 Difference]: Without dead ends: 7949 [2021-08-06 18:37:14,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=2111, Invalid=7989, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 18:37:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7949 states. [2021-08-06 18:37:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7949 to 3704. [2021-08-06 18:37:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3704 states, 3693 states have (on average 1.3049011643650148) internal successors, (4819), 3703 states have internal predecessors, (4819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3704 states to 3704 states and 4819 transitions. [2021-08-06 18:37:14,534 INFO L78 Accepts]: Start accepts. Automaton has 3704 states and 4819 transitions. Word has length 67 [2021-08-06 18:37:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:14,535 INFO L470 AbstractCegarLoop]: Abstraction has 3704 states and 4819 transitions. [2021-08-06 18:37:14,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3704 states and 4819 transitions. [2021-08-06 18:37:14,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:14,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:14,539 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, 1, 1] [2021-08-06 18:37:14,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:14,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:14,765 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash -629952886, now seen corresponding path program 56 times [2021-08-06 18:37:14,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:14,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113644379] [2021-08-06 18:37:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:14,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:14,878 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:14,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:14,891 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:14,892 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:14,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:14,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:14,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:14,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113644379] [2021-08-06 18:37:14,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113644379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:14,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825934628] [2021-08-06 18:37:14,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:14,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:14,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:14,931 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:14,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 18:37:18,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:18,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:18,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:19,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:19,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825934628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:19,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:19,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:19,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395190125] [2021-08-06 18:37:19,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:19,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:19,494 INFO L87 Difference]: Start difference. First operand 3704 states and 4819 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:21,241 INFO L93 Difference]: Finished difference Result 8397 states and 10673 transitions. [2021-08-06 18:37:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-06 18:37:21,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:21,248 INFO L225 Difference]: With dead ends: 8397 [2021-08-06 18:37:21,248 INFO L226 Difference]: Without dead ends: 7957 [2021-08-06 18:37:21,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2958 ImplicationChecksByTransitivity, 1596.9ms TimeCoverageRelationStatistics Valid=1750, Invalid=6260, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 18:37:21,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2021-08-06 18:37:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 3674. [2021-08-06 18:37:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3663 states have (on average 1.3106743106743106) internal successors, (4801), 3673 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 4801 transitions. [2021-08-06 18:37:21,290 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 4801 transitions. Word has length 67 [2021-08-06 18:37:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:21,290 INFO L470 AbstractCegarLoop]: Abstraction has 3674 states and 4801 transitions. [2021-08-06 18:37:21,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 4801 transitions. [2021-08-06 18:37:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:21,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:21,293 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, 1, 1] [2021-08-06 18:37:21,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:21,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:21,494 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:21,495 INFO L82 PathProgramCache]: Analyzing trace with hash -906516586, now seen corresponding path program 57 times [2021-08-06 18:37:21,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:21,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352750045] [2021-08-06 18:37:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:21,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:21,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:21,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:21,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:21,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:21,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:21,598 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:21,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:21,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:21,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:21,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:21,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:21,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352750045] [2021-08-06 18:37:21,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352750045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:21,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005376390] [2021-08-06 18:37:21,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:37:21,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:21,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:21,661 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:21,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 18:37:25,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:37:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:26,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:26,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:26,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005376390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:26,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:26,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:26,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594038411] [2021-08-06 18:37:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:26,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:26,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:26,301 INFO L87 Difference]: Start difference. First operand 3674 states and 4801 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:28,246 INFO L93 Difference]: Finished difference Result 8848 states and 11259 transitions. [2021-08-06 18:37:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 18:37:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:28,256 INFO L225 Difference]: With dead ends: 8848 [2021-08-06 18:37:28,256 INFO L226 Difference]: Without dead ends: 8373 [2021-08-06 18:37:28,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 1820.2ms TimeCoverageRelationStatistics Valid=1849, Invalid=6893, Unknown=0, NotChecked=0, Total=8742 [2021-08-06 18:37:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8373 states. [2021-08-06 18:37:28,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8373 to 3674. [2021-08-06 18:37:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3663 states have (on average 1.3041223041223042) internal successors, (4777), 3673 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 4777 transitions. [2021-08-06 18:37:28,306 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 4777 transitions. Word has length 67 [2021-08-06 18:37:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:28,306 INFO L470 AbstractCegarLoop]: Abstraction has 3674 states and 4777 transitions. [2021-08-06 18:37:28,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 4777 transitions. [2021-08-06 18:37:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:28,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:28,309 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:37:28,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 18:37:28,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:28,509 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash 26243140, now seen corresponding path program 58 times [2021-08-06 18:37:28,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:28,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718936345] [2021-08-06 18:37:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:28,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:28,595 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:28,596 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:28,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:28,607 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:28,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:28,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:28,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:28,633 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:28,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:28,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718936345] [2021-08-06 18:37:28,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718936345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:28,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708076488] [2021-08-06 18:37:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:37:28,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:28,658 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:28,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 18:37:32,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:37:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:32,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:33,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:33,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:33,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708076488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:33,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:33,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:33,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640674896] [2021-08-06 18:37:33,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:33,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:33,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:33,371 INFO L87 Difference]: Start difference. First operand 3674 states and 4777 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:35,013 INFO L93 Difference]: Finished difference Result 8264 states and 10510 transitions. [2021-08-06 18:37:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 18:37:35,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:35,023 INFO L225 Difference]: With dead ends: 8264 [2021-08-06 18:37:35,023 INFO L226 Difference]: Without dead ends: 7864 [2021-08-06 18:37:35,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 1532.3ms TimeCoverageRelationStatistics Valid=1563, Invalid=5409, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 18:37:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7864 states. [2021-08-06 18:37:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7864 to 3649. [2021-08-06 18:37:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3638 states have (on average 1.3045629466739967) internal successors, (4746), 3648 states have internal predecessors, (4746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 4746 transitions. [2021-08-06 18:37:35,071 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 4746 transitions. Word has length 67 [2021-08-06 18:37:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:35,072 INFO L470 AbstractCegarLoop]: Abstraction has 3649 states and 4746 transitions. [2021-08-06 18:37:35,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 4746 transitions. [2021-08-06 18:37:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:35,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:35,075 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, 1, 1] [2021-08-06 18:37:35,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 18:37:35,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 18:37:35,275 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash -754579352, now seen corresponding path program 59 times [2021-08-06 18:37:35,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:35,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317593689] [2021-08-06 18:37:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:35,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:35,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:35,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:35,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:35,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:35,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:35,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:35,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:35,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317593689] [2021-08-06 18:37:35,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317593689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:35,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033256606] [2021-08-06 18:37:35,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:37:35,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:35,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:35,443 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:35,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 18:37:39,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:37:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:39,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:37:39,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:37:40,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:40,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:40,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:40,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:40,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033256606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:40,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:40,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:40,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794888481] [2021-08-06 18:37:40,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:40,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:40,028 INFO L87 Difference]: Start difference. First operand 3649 states and 4746 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:41,422 INFO L93 Difference]: Finished difference Result 8313 states and 10552 transitions. [2021-08-06 18:37:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-06 18:37:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:41,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:41,431 INFO L225 Difference]: With dead ends: 8313 [2021-08-06 18:37:41,432 INFO L226 Difference]: Without dead ends: 7968 [2021-08-06 18:37:41,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 1290.5ms TimeCoverageRelationStatistics Valid=1427, Invalid=5215, Unknown=0, NotChecked=0, Total=6642 [2021-08-06 18:37:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-08-06 18:37:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 3654. [2021-08-06 18:37:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3654 states, 3643 states have (on average 1.3057919297282459) internal successors, (4757), 3653 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3654 states to 3654 states and 4757 transitions. [2021-08-06 18:37:41,477 INFO L78 Accepts]: Start accepts. Automaton has 3654 states and 4757 transitions. Word has length 67 [2021-08-06 18:37:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:41,477 INFO L470 AbstractCegarLoop]: Abstraction has 3654 states and 4757 transitions. [2021-08-06 18:37:41,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3654 states and 4757 transitions. [2021-08-06 18:37:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:41,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:41,480 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, 1, 1] [2021-08-06 18:37:41,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 18:37:41,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-06 18:37:41,680 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:41,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1398350128, now seen corresponding path program 60 times [2021-08-06 18:37:41,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:41,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72713132] [2021-08-06 18:37:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:41,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:41,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:41,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:41,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:41,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:41,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:41,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:41,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:41,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72713132] [2021-08-06 18:37:41,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72713132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:41,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279536248] [2021-08-06 18:37:41,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:37:41,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:41,826 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:41,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 18:37:45,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:37:45,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:45,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:45,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:46,657 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:46,658 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:46,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279536248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:46,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:46,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:46,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849158646] [2021-08-06 18:37:46,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:46,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:46,663 INFO L87 Difference]: Start difference. First operand 3654 states and 4757 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:48,159 INFO L93 Difference]: Finished difference Result 7981 states and 10122 transitions. [2021-08-06 18:37:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 18:37:48,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:48,167 INFO L225 Difference]: With dead ends: 7981 [2021-08-06 18:37:48,167 INFO L226 Difference]: Without dead ends: 7656 [2021-08-06 18:37:48,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 1421.2ms TimeCoverageRelationStatistics Valid=1168, Invalid=4234, Unknown=0, NotChecked=0, Total=5402 [2021-08-06 18:37:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-08-06 18:37:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 3599. [2021-08-06 18:37:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3588 states have (on average 1.3054626532887403) internal successors, (4684), 3598 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 4684 transitions. [2021-08-06 18:37:48,208 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 4684 transitions. Word has length 67 [2021-08-06 18:37:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:48,208 INFO L470 AbstractCegarLoop]: Abstraction has 3599 states and 4684 transitions. [2021-08-06 18:37:48,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:48,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 4684 transitions. [2021-08-06 18:37:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-06 18:37:48,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:48,210 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, 1, 1] [2021-08-06 18:37:48,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 18:37:48,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 18:37:48,411 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1000806460, now seen corresponding path program 61 times [2021-08-06 18:37:48,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:48,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917222339] [2021-08-06 18:37:48,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:48,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:48,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:48,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:48,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:37:48,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:48,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:37:48,560 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:48,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:37:48,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:48,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:48,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:48,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917222339] [2021-08-06 18:37:48,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917222339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:48,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714047228] [2021-08-06 18:37:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:37:48,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:48,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:48,599 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 18:37:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:52,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:37:52,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:53,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:53,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:53,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714047228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:53,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:53,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 18:37:53,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408446274] [2021-08-06 18:37:53,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:37:53,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:37:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:37:53,352 INFO L87 Difference]: Start difference. First operand 3599 states and 4684 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:37:54,521 INFO L93 Difference]: Finished difference Result 7335 states and 9280 transitions. [2021-08-06 18:37:54,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 18:37:54,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-06 18:37:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:37:54,529 INFO L225 Difference]: With dead ends: 7335 [2021-08-06 18:37:54,530 INFO L226 Difference]: Without dead ends: 7105 [2021-08-06 18:37:54,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=1011, Invalid=3819, Unknown=0, NotChecked=0, Total=4830 [2021-08-06 18:37:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7105 states. [2021-08-06 18:37:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7105 to 3634. [2021-08-06 18:37:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3623 states have (on average 1.3008556444935138) internal successors, (4713), 3633 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 4713 transitions. [2021-08-06 18:37:54,573 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 4713 transitions. Word has length 67 [2021-08-06 18:37:54,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:37:54,573 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 4713 transitions. [2021-08-06 18:37:54,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:37:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 4713 transitions. [2021-08-06 18:37:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:37:54,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:37:54,576 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:37:54,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 18:37:54,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 18:37:54,776 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:37:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:37:54,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1438633803, now seen corresponding path program 62 times [2021-08-06 18:37:54,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:37:54,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849075387] [2021-08-06 18:37:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:37:54,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:37:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:37:54,859 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:54,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:37:54,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:54,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:37:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:54,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:37:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849075387] [2021-08-06 18:37:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849075387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393484163] [2021-08-06 18:37:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:37:54,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:37:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:37:54,997 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:37:54,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 18:37:59,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:37:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:37:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:37:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:37:59,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:59,301 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:37:59,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:59,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:37:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:37:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393484163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:37:59,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:37:59,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:37:59,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527602309] [2021-08-06 18:37:59,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:37:59,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:37:59,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:37:59,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:37:59,975 INFO L87 Difference]: Start difference. First operand 3634 states and 4713 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:00,303 INFO L93 Difference]: Finished difference Result 5515 states and 7024 transitions. [2021-08-06 18:38:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 18:38:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:00,309 INFO L225 Difference]: With dead ends: 5515 [2021-08-06 18:38:00,309 INFO L226 Difference]: Without dead ends: 5445 [2021-08-06 18:38:00,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 18:38:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-08-06 18:38:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 3674. [2021-08-06 18:38:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3663 states have (on average 1.3052143052143053) internal successors, (4781), 3673 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 4781 transitions. [2021-08-06 18:38:00,351 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 4781 transitions. Word has length 72 [2021-08-06 18:38:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:00,351 INFO L470 AbstractCegarLoop]: Abstraction has 3674 states and 4781 transitions. [2021-08-06 18:38:00,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 4781 transitions. [2021-08-06 18:38:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:00,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:00,355 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:38:00,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 18:38:00,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:00,555 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:00,555 INFO L82 PathProgramCache]: Analyzing trace with hash -2049518523, now seen corresponding path program 63 times [2021-08-06 18:38:00,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:00,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727876048] [2021-08-06 18:38:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:00,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:00,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:00,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:00,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:00,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:00,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:00,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727876048] [2021-08-06 18:38:00,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727876048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:00,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733933166] [2021-08-06 18:38:00,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:38:00,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:00,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:00,772 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:00,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 18:38:04,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:38:04,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:05,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:05,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:05,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:05,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:05,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733933166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:05,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:05,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:38:05,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128138547] [2021-08-06 18:38:05,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:38:05,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:38:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:38:05,882 INFO L87 Difference]: Start difference. First operand 3674 states and 4781 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:06,396 INFO L93 Difference]: Finished difference Result 6120 states and 7776 transitions. [2021-08-06 18:38:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:38:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:06,402 INFO L225 Difference]: With dead ends: 6120 [2021-08-06 18:38:06,402 INFO L226 Difference]: Without dead ends: 6000 [2021-08-06 18:38:06,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 18:38:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2021-08-06 18:38:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 3719. [2021-08-06 18:38:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3708 states have (on average 1.303128371089536) internal successors, (4832), 3718 states have internal predecessors, (4832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:06,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 4832 transitions. [2021-08-06 18:38:06,439 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 4832 transitions. Word has length 72 [2021-08-06 18:38:06,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:06,439 INFO L470 AbstractCegarLoop]: Abstraction has 3719 states and 4832 transitions. [2021-08-06 18:38:06,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 4832 transitions. [2021-08-06 18:38:06,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:06,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:06,442 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:38:06,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 18:38:06,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:06,643 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1522362047, now seen corresponding path program 64 times [2021-08-06 18:38:06,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:06,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567161469] [2021-08-06 18:38:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:06,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:06,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:06,711 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:06,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:06,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:06,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:06,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567161469] [2021-08-06 18:38:06,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567161469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:06,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552025005] [2021-08-06 18:38:06,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:38:06,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:06,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:06,901 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:06,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 18:38:11,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:38:11,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:11,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:11,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:14,381 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:14,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:14,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552025005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:14,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:14,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:38:14,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118454006] [2021-08-06 18:38:14,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:38:14,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:14,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:38:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=447, Unknown=1, NotChecked=0, Total=600 [2021-08-06 18:38:14,388 INFO L87 Difference]: Start difference. First operand 3719 states and 4832 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:27,829 INFO L93 Difference]: Finished difference Result 6694 states and 8495 transitions. [2021-08-06 18:38:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:38:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:27,839 INFO L225 Difference]: With dead ends: 6694 [2021-08-06 18:38:27,839 INFO L226 Difference]: Without dead ends: 6524 [2021-08-06 18:38:27,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 11080.7ms TimeCoverageRelationStatistics Valid=519, Invalid=1550, Unknown=1, NotChecked=0, Total=2070 [2021-08-06 18:38:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6524 states. [2021-08-06 18:38:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6524 to 3774. [2021-08-06 18:38:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3774 states, 3763 states have (on average 1.3034812649481797) internal successors, (4905), 3773 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 4905 transitions. [2021-08-06 18:38:27,883 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 4905 transitions. Word has length 72 [2021-08-06 18:38:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:27,883 INFO L470 AbstractCegarLoop]: Abstraction has 3774 states and 4905 transitions. [2021-08-06 18:38:27,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 4905 transitions. [2021-08-06 18:38:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:27,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:27,886 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:38:27,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 18:38:28,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:28,087 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1862770253, now seen corresponding path program 65 times [2021-08-06 18:38:28,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:28,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146754091] [2021-08-06 18:38:28,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:28,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:28,127 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:28,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:28,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:28,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:28,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:28,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146754091] [2021-08-06 18:38:28,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146754091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:28,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967878930] [2021-08-06 18:38:28,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:38:28,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:28,282 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:28,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 18:38:32,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:38:32,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:32,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:32,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:32,859 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:33,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:33,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:33,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967878930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:33,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:33,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:38:33,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014461777] [2021-08-06 18:38:33,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:38:33,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:38:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:38:33,658 INFO L87 Difference]: Start difference. First operand 3774 states and 4905 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:34,333 INFO L93 Difference]: Finished difference Result 6260 states and 7951 transitions. [2021-08-06 18:38:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:38:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:34,341 INFO L225 Difference]: With dead ends: 6260 [2021-08-06 18:38:34,341 INFO L226 Difference]: Without dead ends: 6190 [2021-08-06 18:38:34,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=561, Invalid=1601, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:38:34,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6190 states. [2021-08-06 18:38:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6190 to 3769. [2021-08-06 18:38:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3758 states have (on average 1.302288451303885) internal successors, (4894), 3768 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 4894 transitions. [2021-08-06 18:38:34,384 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 4894 transitions. Word has length 72 [2021-08-06 18:38:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:34,385 INFO L470 AbstractCegarLoop]: Abstraction has 3769 states and 4894 transitions. [2021-08-06 18:38:34,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 4894 transitions. [2021-08-06 18:38:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:34,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:34,388 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:38:34,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 18:38:34,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:34,588 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:38:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:38:34,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1802071611, now seen corresponding path program 66 times [2021-08-06 18:38:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:38:34,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359877445] [2021-08-06 18:38:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:38:34,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:38:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:38:34,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:34,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:38:34,733 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:34,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:38:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:34,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:38:34,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359877445] [2021-08-06 18:38:34,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359877445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:34,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833133887] [2021-08-06 18:38:34,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:38:34,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:38:34,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:38:34,763 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:38:34,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 18:38:39,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:38:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:38:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:38:39,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:38:39,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:39,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:38:42,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:42,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:38:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:38:42,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833133887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:38:42,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:38:42,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:38:42,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049624256] [2021-08-06 18:38:42,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:38:42,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:38:42,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:38:42,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=453, Unknown=1, NotChecked=0, Total=600 [2021-08-06 18:38:42,623 INFO L87 Difference]: Start difference. First operand 3769 states and 4894 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:38:59,939 INFO L93 Difference]: Finished difference Result 6663 states and 8467 transitions. [2021-08-06 18:38:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 18:38:59,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:38:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:38:59,948 INFO L225 Difference]: With dead ends: 6663 [2021-08-06 18:38:59,948 INFO L226 Difference]: Without dead ends: 6443 [2021-08-06 18:38:59,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 17358.9ms TimeCoverageRelationStatistics Valid=606, Invalid=1745, Unknown=1, NotChecked=0, Total=2352 [2021-08-06 18:38:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6443 states. [2021-08-06 18:38:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6443 to 3864. [2021-08-06 18:38:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3853 states have (on average 1.2995068777575915) internal successors, (5007), 3863 states have internal predecessors, (5007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 5007 transitions. [2021-08-06 18:38:59,994 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 5007 transitions. Word has length 72 [2021-08-06 18:38:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:38:59,995 INFO L470 AbstractCegarLoop]: Abstraction has 3864 states and 5007 transitions. [2021-08-06 18:38:59,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:38:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 5007 transitions. [2021-08-06 18:38:59,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:38:59,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:38:59,998 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:00,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 18:39:00,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:00,198 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2142479817, now seen corresponding path program 67 times [2021-08-06 18:39:00,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:00,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017665899] [2021-08-06 18:39:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:00,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:00,263 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:00,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:00,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:00,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:00,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:00,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017665899] [2021-08-06 18:39:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017665899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:00,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552058607] [2021-08-06 18:39:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:39:00,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:00,423 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:00,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 18:39:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:04,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:05,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:05,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:05,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:05,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:05,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552058607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:05,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:05,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:05,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101052439] [2021-08-06 18:39:05,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:05,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:05,932 INFO L87 Difference]: Start difference. First operand 3864 states and 5007 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:06,785 INFO L93 Difference]: Finished difference Result 6708 states and 8512 transitions. [2021-08-06 18:39:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:39:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:06,793 INFO L225 Difference]: With dead ends: 6708 [2021-08-06 18:39:06,793 INFO L226 Difference]: Without dead ends: 6588 [2021-08-06 18:39:06,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 928.1ms TimeCoverageRelationStatistics Valid=635, Invalid=1815, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:39:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-08-06 18:39:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 3899. [2021-08-06 18:39:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3888 states have (on average 1.301440329218107) internal successors, (5060), 3898 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 5060 transitions. [2021-08-06 18:39:06,859 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 5060 transitions. Word has length 72 [2021-08-06 18:39:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:06,859 INFO L470 AbstractCegarLoop]: Abstraction has 3899 states and 5060 transitions. [2021-08-06 18:39:06,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 5060 transitions. [2021-08-06 18:39:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:06,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:06,862 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:06,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:07,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-06 18:39:07,063 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 231830735, now seen corresponding path program 68 times [2021-08-06 18:39:07,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:07,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811882016] [2021-08-06 18:39:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:07,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:07,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:07,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:07,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:07,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:07,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:07,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811882016] [2021-08-06 18:39:07,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811882016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:07,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341450540] [2021-08-06 18:39:07,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:39:07,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:07,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:07,247 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:07,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 18:39:11,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:39:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:11,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:11,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:12,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:12,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:12,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341450540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:12,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:12,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:12,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120101796] [2021-08-06 18:39:12,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:12,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:12,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:12,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:12,901 INFO L87 Difference]: Start difference. First operand 3899 states and 5060 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:13,776 INFO L93 Difference]: Finished difference Result 6708 states and 8520 transitions. [2021-08-06 18:39:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 18:39:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:13,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:13,784 INFO L225 Difference]: With dead ends: 6708 [2021-08-06 18:39:13,784 INFO L226 Difference]: Without dead ends: 6588 [2021-08-06 18:39:13,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 957.1ms TimeCoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:39:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-08-06 18:39:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 3899. [2021-08-06 18:39:13,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3888 states have (on average 1.301440329218107) internal successors, (5060), 3898 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 5060 transitions. [2021-08-06 18:39:13,827 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 5060 transitions. Word has length 72 [2021-08-06 18:39:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:13,827 INFO L470 AbstractCegarLoop]: Abstraction has 3899 states and 5060 transitions. [2021-08-06 18:39:13,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:13,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 5060 transitions. [2021-08-06 18:39:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:13,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:13,830 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:39:13,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:14,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-06 18:39:14,032 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash -207302523, now seen corresponding path program 69 times [2021-08-06 18:39:14,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:14,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120938473] [2021-08-06 18:39:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:14,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:14,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:14,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:14,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:14,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:14,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:14,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120938473] [2021-08-06 18:39:14,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120938473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:14,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497175567] [2021-08-06 18:39:14,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:39:14,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:14,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:14,211 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:14,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 18:39:18,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:39:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:19,106 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:19,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:19,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:19,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:19,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497175567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:19,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:19,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:19,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308124546] [2021-08-06 18:39:19,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:19,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:19,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:19,862 INFO L87 Difference]: Start difference. First operand 3899 states and 5060 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:20,754 INFO L93 Difference]: Finished difference Result 6668 states and 8465 transitions. [2021-08-06 18:39:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 18:39:20,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:20,761 INFO L225 Difference]: With dead ends: 6668 [2021-08-06 18:39:20,762 INFO L226 Difference]: Without dead ends: 6498 [2021-08-06 18:39:20,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 18:39:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6498 states. [2021-08-06 18:39:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6498 to 3899. [2021-08-06 18:39:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3888 states have (on average 1.301440329218107) internal successors, (5060), 3898 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 5060 transitions. [2021-08-06 18:39:20,804 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 5060 transitions. Word has length 72 [2021-08-06 18:39:20,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:20,804 INFO L470 AbstractCegarLoop]: Abstraction has 3899 states and 5060 transitions. [2021-08-06 18:39:20,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 5060 transitions. [2021-08-06 18:39:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:20,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:20,807 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:39:20,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 18:39:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:21,008 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:21,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1451489019, now seen corresponding path program 70 times [2021-08-06 18:39:21,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:21,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693313223] [2021-08-06 18:39:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:21,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:21,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:21,055 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:21,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:21,159 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:21,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:21,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693313223] [2021-08-06 18:39:21,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693313223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:21,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488275844] [2021-08-06 18:39:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:39:21,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:21,192 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:21,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 18:39:25,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:39:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:26,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:26,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:26,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:26,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:26,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488275844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:26,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:26,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:26,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689299829] [2021-08-06 18:39:26,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:26,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:26,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:26,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:26,855 INFO L87 Difference]: Start difference. First operand 3899 states and 5060 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:27,740 INFO L93 Difference]: Finished difference Result 6679 states and 8486 transitions. [2021-08-06 18:39:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 18:39:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:27,748 INFO L225 Difference]: With dead ends: 6679 [2021-08-06 18:39:27,748 INFO L226 Difference]: Without dead ends: 6509 [2021-08-06 18:39:27,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 18:39:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6509 states. [2021-08-06 18:39:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6509 to 3909. [2021-08-06 18:39:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3898 states have (on average 1.3037455105182145) internal successors, (5082), 3908 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 5082 transitions. [2021-08-06 18:39:27,790 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 5082 transitions. Word has length 72 [2021-08-06 18:39:27,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:27,791 INFO L470 AbstractCegarLoop]: Abstraction has 3909 states and 5082 transitions. [2021-08-06 18:39:27,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 5082 transitions. [2021-08-06 18:39:27,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:27,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:27,794 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:27,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:27,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:27,994 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:27,995 INFO L82 PathProgramCache]: Analyzing trace with hash 340704889, now seen corresponding path program 71 times [2021-08-06 18:39:27,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:27,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902315812] [2021-08-06 18:39:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:27,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:28,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:28,043 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:28,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:28,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:28,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:28,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902315812] [2021-08-06 18:39:28,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902315812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:28,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435508922] [2021-08-06 18:39:28,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:39:28,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:28,258 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:28,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 18:39:33,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:39:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:33,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:33,270 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:34,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:34,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:34,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435508922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:34,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:34,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:34,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389500437] [2021-08-06 18:39:34,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:34,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:34,022 INFO L87 Difference]: Start difference. First operand 3909 states and 5082 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:34,915 INFO L93 Difference]: Finished difference Result 6699 states and 8509 transitions. [2021-08-06 18:39:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 18:39:34,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:34,922 INFO L225 Difference]: With dead ends: 6699 [2021-08-06 18:39:34,922 INFO L226 Difference]: Without dead ends: 6579 [2021-08-06 18:39:34,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 956.4ms TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 18:39:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6579 states. [2021-08-06 18:39:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6579 to 3899. [2021-08-06 18:39:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3888 states have (on average 1.301440329218107) internal successors, (5060), 3898 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:34,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 5060 transitions. [2021-08-06 18:39:34,965 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 5060 transitions. Word has length 72 [2021-08-06 18:39:34,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:34,965 INFO L470 AbstractCegarLoop]: Abstraction has 3899 states and 5060 transitions. [2021-08-06 18:39:34,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:34,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 5060 transitions. [2021-08-06 18:39:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:34,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:34,968 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:39:34,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 18:39:35,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:35,169 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1413303233, now seen corresponding path program 72 times [2021-08-06 18:39:35,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:35,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969862951] [2021-08-06 18:39:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:35,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 18:39:35,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:35,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969862951] [2021-08-06 18:39:35,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969862951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:35,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304214879] [2021-08-06 18:39:35,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:39:35,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:35,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:35,284 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:35,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 18:39:40,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 18:39:40,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:39:40,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:40,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:40,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:39:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 18:39:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304214879] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:39:40,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 18:39:40,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-06 18:39:40,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609170768] [2021-08-06 18:39:40,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:39:40,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:40,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:39:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:39:40,506 INFO L87 Difference]: Start difference. First operand 3899 states and 5060 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) [2021-08-06 18:39:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:40,633 INFO L93 Difference]: Finished difference Result 4512 states and 5661 transitions. [2021-08-06 18:39:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:39:40,645 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 72 [2021-08-06 18:39:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:40,650 INFO L225 Difference]: With dead ends: 4512 [2021-08-06 18:39:40,651 INFO L226 Difference]: Without dead ends: 3537 [2021-08-06 18:39:40,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-08-06 18:39:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3240. [2021-08-06 18:39:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3232 states have (on average 1.2892945544554455) internal successors, (4167), 3239 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4167 transitions. [2021-08-06 18:39:40,687 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4167 transitions. Word has length 72 [2021-08-06 18:39:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:40,687 INFO L470 AbstractCegarLoop]: Abstraction has 3240 states and 4167 transitions. [2021-08-06 18:39:40,687 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) [2021-08-06 18:39:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4167 transitions. [2021-08-06 18:39:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:40,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:40,690 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:39:40,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:40,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:40,905 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:40,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:40,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1751538357, now seen corresponding path program 73 times [2021-08-06 18:39:40,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:40,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926155124] [2021-08-06 18:39:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:40,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:40,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:40,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:41,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:41,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:41,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:41,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926155124] [2021-08-06 18:39:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926155124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:41,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570111883] [2021-08-06 18:39:41,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:39:41,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:41,152 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:41,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 18:39:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:46,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:46,197 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:46,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:46,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:46,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570111883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:46,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:46,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:46,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768128635] [2021-08-06 18:39:46,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:46,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:46,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:46,890 INFO L87 Difference]: Start difference. First operand 3240 states and 4167 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:47,507 INFO L93 Difference]: Finished difference Result 4974 states and 6255 transitions. [2021-08-06 18:39:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:39:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:47,513 INFO L225 Difference]: With dead ends: 4974 [2021-08-06 18:39:47,514 INFO L226 Difference]: Without dead ends: 4905 [2021-08-06 18:39:47,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=594, Invalid=1476, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 18:39:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4905 states. [2021-08-06 18:39:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4905 to 3315. [2021-08-06 18:39:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3307 states have (on average 1.2872694284850317) internal successors, (4257), 3314 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 4257 transitions. [2021-08-06 18:39:47,570 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 4257 transitions. Word has length 72 [2021-08-06 18:39:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:47,570 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 4257 transitions. [2021-08-06 18:39:47,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 4257 transitions. [2021-08-06 18:39:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:47,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:47,573 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:39:47,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 18:39:47,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 18:39:47,774 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1072895027, now seen corresponding path program 74 times [2021-08-06 18:39:47,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:47,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121135946] [2021-08-06 18:39:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:47,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:47,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:47,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:47,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:47,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:47,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:47,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121135946] [2021-08-06 18:39:47,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121135946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:47,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293348230] [2021-08-06 18:39:47,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:39:47,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:47,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:47,949 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:47,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 18:39:52,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:39:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:52,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:53,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:53,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:53,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:53,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:39:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:53,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293348230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:53,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:39:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:39:53,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642830609] [2021-08-06 18:39:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:39:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:39:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:39:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:39:53,856 INFO L87 Difference]: Start difference. First operand 3315 states and 4257 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:39:54,369 INFO L93 Difference]: Finished difference Result 5188 states and 6534 transitions. [2021-08-06 18:39:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:39:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:39:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:39:54,375 INFO L225 Difference]: With dead ends: 5188 [2021-08-06 18:39:54,375 INFO L226 Difference]: Without dead ends: 5012 [2021-08-06 18:39:54,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 604.3ms TimeCoverageRelationStatistics Valid=484, Invalid=1238, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 18:39:54,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-08-06 18:39:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 3315. [2021-08-06 18:39:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3307 states have (on average 1.2872694284850317) internal successors, (4257), 3314 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 4257 transitions. [2021-08-06 18:39:54,415 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 4257 transitions. Word has length 72 [2021-08-06 18:39:54,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:39:54,415 INFO L470 AbstractCegarLoop]: Abstraction has 3315 states and 4257 transitions. [2021-08-06 18:39:54,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:39:54,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 4257 transitions. [2021-08-06 18:39:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:39:54,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:39:54,418 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:39:54,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 18:39:54,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 18:39:54,619 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:39:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:39:54,620 INFO L82 PathProgramCache]: Analyzing trace with hash -847761717, now seen corresponding path program 75 times [2021-08-06 18:39:54,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:39:54,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925709078] [2021-08-06 18:39:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:39:54,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:39:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:39:54,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:54,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:39:54,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:54,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:39:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:39:54,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:39:54,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925709078] [2021-08-06 18:39:54,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925709078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:39:54,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885571477] [2021-08-06 18:39:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:39:54,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:39:54,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:39:54,791 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:39:54,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 18:39:59,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:39:59,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:39:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:39:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:39:59,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:39:59,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:00,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:00,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:00,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885571477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:00,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:00,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:00,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513271482] [2021-08-06 18:40:00,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:00,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:00,765 INFO L87 Difference]: Start difference. First operand 3315 states and 4257 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:01,425 INFO L93 Difference]: Finished difference Result 5273 states and 6634 transitions. [2021-08-06 18:40:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:40:01,426 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:01,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:01,431 INFO L225 Difference]: With dead ends: 5273 [2021-08-06 18:40:01,431 INFO L226 Difference]: Without dead ends: 5117 [2021-08-06 18:40:01,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 742.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:40:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-08-06 18:40:01,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 3310. [2021-08-06 18:40:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 3302 states have (on average 1.2861901877649908) internal successors, (4247), 3309 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4247 transitions. [2021-08-06 18:40:01,462 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4247 transitions. Word has length 72 [2021-08-06 18:40:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:01,463 INFO L470 AbstractCegarLoop]: Abstraction has 3310 states and 4247 transitions. [2021-08-06 18:40:01,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4247 transitions. [2021-08-06 18:40:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:01,465 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:01,465 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:40:01,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:01,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 18:40:01,666 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash -948659851, now seen corresponding path program 76 times [2021-08-06 18:40:01,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:01,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740357238] [2021-08-06 18:40:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:01,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:01,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:01,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:01,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:01,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:01,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:01,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740357238] [2021-08-06 18:40:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740357238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:01,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229896] [2021-08-06 18:40:01,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:40:01,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:01,847 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:01,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 18:40:06,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:40:06,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:06,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:06,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:07,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:07,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:07,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:07,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:07,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:07,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:07,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:07,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568688218] [2021-08-06 18:40:07,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:07,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:07,944 INFO L87 Difference]: Start difference. First operand 3310 states and 4247 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:08,610 INFO L93 Difference]: Finished difference Result 5258 states and 6606 transitions. [2021-08-06 18:40:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:40:08,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:08,616 INFO L225 Difference]: With dead ends: 5258 [2021-08-06 18:40:08,616 INFO L226 Difference]: Without dead ends: 5082 [2021-08-06 18:40:08,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:40:08,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2021-08-06 18:40:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 3320. [2021-08-06 18:40:08,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3312 states have (on average 1.2883454106280192) internal successors, (4267), 3319 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 4267 transitions. [2021-08-06 18:40:08,646 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 4267 transitions. Word has length 72 [2021-08-06 18:40:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:08,646 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 4267 transitions. [2021-08-06 18:40:08,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 4267 transitions. [2021-08-06 18:40:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:08,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:08,648 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:40:08,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 18:40:08,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 18:40:08,849 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash -738887563, now seen corresponding path program 77 times [2021-08-06 18:40:08,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:08,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374876297] [2021-08-06 18:40:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:08,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:08,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:08,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:08,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:08,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:09,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:09,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374876297] [2021-08-06 18:40:09,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374876297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:09,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279017259] [2021-08-06 18:40:09,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:40:09,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:09,022 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:09,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 18:40:14,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:40:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:14,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:14,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:14,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:15,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:15,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:15,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279017259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:15,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:15,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:15,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630194918] [2021-08-06 18:40:15,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:15,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:15,149 INFO L87 Difference]: Start difference. First operand 3320 states and 4267 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:15,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:15,925 INFO L93 Difference]: Finished difference Result 5478 states and 6883 transitions. [2021-08-06 18:40:15,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:40:15,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:15,931 INFO L225 Difference]: With dead ends: 5478 [2021-08-06 18:40:15,931 INFO L226 Difference]: Without dead ends: 5242 [2021-08-06 18:40:15,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 866.1ms TimeCoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:40:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-08-06 18:40:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 3330. [2021-08-06 18:40:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3322 states have (on average 1.290487658037327) internal successors, (4287), 3329 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4287 transitions. [2021-08-06 18:40:15,962 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4287 transitions. Word has length 72 [2021-08-06 18:40:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 3330 states and 4287 transitions. [2021-08-06 18:40:15,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4287 transitions. [2021-08-06 18:40:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:15,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:15,965 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:15,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:16,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 18:40:16,165 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:16,166 INFO L82 PathProgramCache]: Analyzing trace with hash -400652439, now seen corresponding path program 78 times [2021-08-06 18:40:16,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:16,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651238299] [2021-08-06 18:40:16,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:16,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:16,212 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:16,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:16,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:16,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:16,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:16,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651238299] [2021-08-06 18:40:16,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651238299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:16,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684453177] [2021-08-06 18:40:16,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:40:16,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:16,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:16,342 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:16,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 18:40:21,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:40:21,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:21,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:21,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:21,806 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:21,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:22,538 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:22,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:22,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684453177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:22,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:22,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:22,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584090124] [2021-08-06 18:40:22,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:22,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:22,544 INFO L87 Difference]: Start difference. First operand 3330 states and 4287 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:23,278 INFO L93 Difference]: Finished difference Result 5785 states and 7239 transitions. [2021-08-06 18:40:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:40:23,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:23,284 INFO L225 Difference]: With dead ends: 5785 [2021-08-06 18:40:23,284 INFO L226 Difference]: Without dead ends: 5584 [2021-08-06 18:40:23,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=641, Invalid=1521, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:40:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2021-08-06 18:40:23,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 3355. [2021-08-06 18:40:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3347 states have (on average 1.290110546758291) internal successors, (4318), 3354 states have internal predecessors, (4318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4318 transitions. [2021-08-06 18:40:23,319 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4318 transitions. Word has length 72 [2021-08-06 18:40:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:23,319 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 4318 transitions. [2021-08-06 18:40:23,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4318 transitions. [2021-08-06 18:40:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:23,321 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:23,321 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:40:23,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:23,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:23,522 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash 767430003, now seen corresponding path program 79 times [2021-08-06 18:40:23,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:23,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548617359] [2021-08-06 18:40:23,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:23,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:23,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:23,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:23,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:23,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:23,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:23,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548617359] [2021-08-06 18:40:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548617359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:23,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115509063] [2021-08-06 18:40:23,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:40:23,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:23,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:23,697 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:23,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 18:40:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:28,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:28,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:29,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:29,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:29,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:29,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:29,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115509063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:29,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:29,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:29,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440040947] [2021-08-06 18:40:29,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:29,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:29,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:29,869 INFO L87 Difference]: Start difference. First operand 3355 states and 4318 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:30,538 INFO L93 Difference]: Finished difference Result 5259 states and 6613 transitions. [2021-08-06 18:40:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:40:30,538 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:30,543 INFO L225 Difference]: With dead ends: 5259 [2021-08-06 18:40:30,544 INFO L226 Difference]: Without dead ends: 5155 [2021-08-06 18:40:30,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 754.8ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 18:40:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5155 states. [2021-08-06 18:40:30,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5155 to 3440. [2021-08-06 18:40:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3432 states have (on average 1.2902097902097902) internal successors, (4428), 3439 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4428 transitions. [2021-08-06 18:40:30,575 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4428 transitions. Word has length 72 [2021-08-06 18:40:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:30,575 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 4428 transitions. [2021-08-06 18:40:30,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4428 transitions. [2021-08-06 18:40:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:30,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:30,578 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:40:30,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 18:40:30,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:30,780 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:30,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1153226741, now seen corresponding path program 80 times [2021-08-06 18:40:30,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:30,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871400961] [2021-08-06 18:40:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:30,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:30,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:30,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:30,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:30,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:30,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:30,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871400961] [2021-08-06 18:40:30,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871400961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:30,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390604035] [2021-08-06 18:40:30,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:40:30,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:30,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:30,979 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:30,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 18:40:36,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:40:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:36,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:36,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:36,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:36,558 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:37,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:37,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:37,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390604035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:37,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:37,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:37,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733730472] [2021-08-06 18:40:37,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:37,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:37,233 INFO L87 Difference]: Start difference. First operand 3440 states and 4428 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:37,945 INFO L93 Difference]: Finished difference Result 5433 states and 6827 transitions. [2021-08-06 18:40:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 18:40:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:37,951 INFO L225 Difference]: With dead ends: 5433 [2021-08-06 18:40:37,951 INFO L226 Difference]: Without dead ends: 5227 [2021-08-06 18:40:37,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 787.2ms TimeCoverageRelationStatistics Valid=709, Invalid=1741, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 18:40:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2021-08-06 18:40:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 3490. [2021-08-06 18:40:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3482 states have (on average 1.288914417001723) internal successors, (4488), 3489 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 4488 transitions. [2021-08-06 18:40:37,981 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 4488 transitions. Word has length 72 [2021-08-06 18:40:37,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 3490 states and 4488 transitions. [2021-08-06 18:40:37,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 4488 transitions. [2021-08-06 18:40:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:37,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:37,984 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:40:38,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 18:40:38,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 18:40:38,185 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:38,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:38,185 INFO L82 PathProgramCache]: Analyzing trace with hash 977202291, now seen corresponding path program 81 times [2021-08-06 18:40:38,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:38,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405483634] [2021-08-06 18:40:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:38,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:38,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:38,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:38,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:38,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:38,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:38,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405483634] [2021-08-06 18:40:38,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405483634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:38,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285440087] [2021-08-06 18:40:38,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:40:38,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:38,373 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:38,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 18:40:43,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:40:43,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:44,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:44,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:44,710 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:44,711 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:44,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285440087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:44,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:44,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:44,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130770732] [2021-08-06 18:40:44,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:44,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:44,716 INFO L87 Difference]: Start difference. First operand 3490 states and 4488 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:45,324 INFO L93 Difference]: Finished difference Result 5314 states and 6654 transitions. [2021-08-06 18:40:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:40:45,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:45,331 INFO L225 Difference]: With dead ends: 5314 [2021-08-06 18:40:45,331 INFO L226 Difference]: Without dead ends: 5150 [2021-08-06 18:40:45,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=646, Invalid=1610, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 18:40:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5150 states. [2021-08-06 18:40:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5150 to 3490. [2021-08-06 18:40:45,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3482 states have (on average 1.288914417001723) internal successors, (4488), 3489 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 4488 transitions. [2021-08-06 18:40:45,374 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 4488 transitions. Word has length 72 [2021-08-06 18:40:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:45,374 INFO L470 AbstractCegarLoop]: Abstraction has 3490 states and 4488 transitions. [2021-08-06 18:40:45,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 4488 transitions. [2021-08-06 18:40:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:45,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:45,377 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:45,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 18:40:45,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 18:40:45,578 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:45,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1315437415, now seen corresponding path program 82 times [2021-08-06 18:40:45,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:45,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392559338] [2021-08-06 18:40:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:45,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:45,638 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:45,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:45,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:45,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:45,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:45,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392559338] [2021-08-06 18:40:45,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392559338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:45,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639410924] [2021-08-06 18:40:45,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:40:45,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:45,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:45,819 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:45,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 18:40:51,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:40:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:51,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:51,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:52,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:52,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:52,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:52,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:52,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639410924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:52,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:52,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:52,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3863517] [2021-08-06 18:40:52,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:52,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:52,127 INFO L87 Difference]: Start difference. First operand 3490 states and 4488 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:40:52,625 INFO L93 Difference]: Finished difference Result 5680 states and 7136 transitions. [2021-08-06 18:40:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 18:40:52,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:40:52,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:40:52,630 INFO L225 Difference]: With dead ends: 5680 [2021-08-06 18:40:52,630 INFO L226 Difference]: Without dead ends: 5434 [2021-08-06 18:40:52,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:40:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-08-06 18:40:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3485. [2021-08-06 18:40:52,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3477 states have (on average 1.2878918607995398) internal successors, (4478), 3484 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 4478 transitions. [2021-08-06 18:40:52,663 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 4478 transitions. Word has length 72 [2021-08-06 18:40:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:40:52,663 INFO L470 AbstractCegarLoop]: Abstraction has 3485 states and 4478 transitions. [2021-08-06 18:40:52,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:40:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 4478 transitions. [2021-08-06 18:40:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:40:52,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:40:52,666 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:40:52,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 18:40:52,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:52,867 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:40:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:40:52,867 INFO L82 PathProgramCache]: Analyzing trace with hash 463386623, now seen corresponding path program 83 times [2021-08-06 18:40:52,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:40:52,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280403467] [2021-08-06 18:40:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:40:52,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:40:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:40:52,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:52,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:40:53,026 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:53,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:40:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:53,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:40:53,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280403467] [2021-08-06 18:40:53,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280403467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:53,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680182738] [2021-08-06 18:40:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:40:53,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:40:53,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:40:53,057 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:40:53,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 18:40:58,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:40:58,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:40:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:40:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:40:58,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:58,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:40:59,544 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:59,545 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:40:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:40:59,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680182738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:40:59,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:40:59,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:40:59,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963634930] [2021-08-06 18:40:59,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:40:59,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:40:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:40:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:40:59,550 INFO L87 Difference]: Start difference. First operand 3485 states and 4478 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:00,337 INFO L93 Difference]: Finished difference Result 5646 states and 7068 transitions. [2021-08-06 18:41:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 18:41:00,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:00,343 INFO L225 Difference]: With dead ends: 5646 [2021-08-06 18:41:00,343 INFO L226 Difference]: Without dead ends: 5504 [2021-08-06 18:41:00,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=685, Invalid=1667, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 18:41:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2021-08-06 18:41:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 3470. [2021-08-06 18:41:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3462 states have (on average 1.2908723281340266) internal successors, (4469), 3469 states have internal predecessors, (4469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 4469 transitions. [2021-08-06 18:41:00,378 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 4469 transitions. Word has length 72 [2021-08-06 18:41:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:00,379 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 4469 transitions. [2021-08-06 18:41:00,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 4469 transitions. [2021-08-06 18:41:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:00,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:00,381 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:41:00,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:00,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:00,582 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash -909262709, now seen corresponding path program 84 times [2021-08-06 18:41:00,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:00,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043331780] [2021-08-06 18:41:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:00,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:00,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:00,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:00,748 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:00,749 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:00,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:00,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043331780] [2021-08-06 18:41:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043331780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:00,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685907769] [2021-08-06 18:41:00,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:41:00,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:00,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:00,779 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:00,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 18:41:06,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:41:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:06,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:06,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:07,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:07,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:07,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685907769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:07,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:07,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:07,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993994746] [2021-08-06 18:41:07,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:07,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:07,373 INFO L87 Difference]: Start difference. First operand 3470 states and 4469 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:07,922 INFO L93 Difference]: Finished difference Result 5271 states and 6623 transitions. [2021-08-06 18:41:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:41:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:07,928 INFO L225 Difference]: With dead ends: 5271 [2021-08-06 18:41:07,928 INFO L226 Difference]: Without dead ends: 5129 [2021-08-06 18:41:07,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=539, Invalid=1441, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 18:41:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5129 states. [2021-08-06 18:41:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5129 to 3450. [2021-08-06 18:41:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 3442 states have (on average 1.2867518884369553) internal successors, (4429), 3449 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 4429 transitions. [2021-08-06 18:41:07,981 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 4429 transitions. Word has length 72 [2021-08-06 18:41:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:07,981 INFO L470 AbstractCegarLoop]: Abstraction has 3450 states and 4429 transitions. [2021-08-06 18:41:07,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:07,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 4429 transitions. [2021-08-06 18:41:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:07,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:07,984 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:41:08,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:08,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 18:41:08,189 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:08,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1412150597, now seen corresponding path program 85 times [2021-08-06 18:41:08,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:08,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107594586] [2021-08-06 18:41:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:08,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:08,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:08,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:08,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:08,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:08,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:08,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:08,358 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:08,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:08,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107594586] [2021-08-06 18:41:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107594586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:08,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044152702] [2021-08-06 18:41:08,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:41:08,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:08,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:08,360 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:08,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 18:41:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:14,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:14,328 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:14,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:14,997 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:15,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044152702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:15,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:15,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:15,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625980901] [2021-08-06 18:41:15,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:15,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:15,003 INFO L87 Difference]: Start difference. First operand 3450 states and 4429 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:15,463 INFO L93 Difference]: Finished difference Result 5033 states and 6339 transitions. [2021-08-06 18:41:15,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:41:15,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:15,469 INFO L225 Difference]: With dead ends: 5033 [2021-08-06 18:41:15,469 INFO L226 Difference]: Without dead ends: 4892 [2021-08-06 18:41:15,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 546.9ms TimeCoverageRelationStatistics Valid=422, Invalid=1138, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 18:41:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-08-06 18:41:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 3455. [2021-08-06 18:41:15,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3447 states have (on average 1.2877864809979693) internal successors, (4439), 3454 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 4439 transitions. [2021-08-06 18:41:15,514 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 4439 transitions. Word has length 72 [2021-08-06 18:41:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:15,514 INFO L470 AbstractCegarLoop]: Abstraction has 3455 states and 4439 transitions. [2021-08-06 18:41:15,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 4439 transitions. [2021-08-06 18:41:15,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:15,517 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:15,517 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:41:15,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 18:41:15,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 18:41:15,733 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1621922885, now seen corresponding path program 86 times [2021-08-06 18:41:15,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:15,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322273526] [2021-08-06 18:41:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:15,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:15,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:15,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:15,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:15,817 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:15,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:15,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:15,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:15,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322273526] [2021-08-06 18:41:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322273526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:15,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387059061] [2021-08-06 18:41:15,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:41:15,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:15,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:15,939 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:15,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 18:41:21,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:41:21,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:21,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:21,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:21,948 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:21,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:22,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:22,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:22,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387059061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:22,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:22,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:22,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889345331] [2021-08-06 18:41:22,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:22,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:22,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:22,632 INFO L87 Difference]: Start difference. First operand 3455 states and 4439 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:23,151 INFO L93 Difference]: Finished difference Result 5268 states and 6615 transitions. [2021-08-06 18:41:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:41:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:23,156 INFO L225 Difference]: With dead ends: 5268 [2021-08-06 18:41:23,156 INFO L226 Difference]: Without dead ends: 5112 [2021-08-06 18:41:23,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=464, Invalid=1176, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:41:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-08-06 18:41:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 3430. [2021-08-06 18:41:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3422 states have (on average 1.288427819988311) internal successors, (4409), 3429 states have internal predecessors, (4409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 4409 transitions. [2021-08-06 18:41:23,187 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 4409 transitions. Word has length 72 [2021-08-06 18:41:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:23,187 INFO L470 AbstractCegarLoop]: Abstraction has 3430 states and 4409 transitions. [2021-08-06 18:41:23,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 4409 transitions. [2021-08-06 18:41:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:23,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:23,190 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:41:23,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 18:41:23,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 18:41:23,391 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1604438459, now seen corresponding path program 87 times [2021-08-06 18:41:23,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:23,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429922317] [2021-08-06 18:41:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:23,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:23,440 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:23,441 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:23,452 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:23,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:23,536 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:23,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:23,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:23,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429922317] [2021-08-06 18:41:23,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429922317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:23,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560892347] [2021-08-06 18:41:23,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:41:23,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:23,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:23,565 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:23,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 18:41:29,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:41:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:29,619 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:29,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:30,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:30,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:30,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560892347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:30,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:30,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:30,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768392844] [2021-08-06 18:41:30,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:30,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:30,264 INFO L87 Difference]: Start difference. First operand 3430 states and 4409 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:30,841 INFO L93 Difference]: Finished difference Result 5158 states and 6486 transitions. [2021-08-06 18:41:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 18:41:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:30,846 INFO L225 Difference]: With dead ends: 5158 [2021-08-06 18:41:30,846 INFO L226 Difference]: Without dead ends: 5017 [2021-08-06 18:41:30,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=620, Invalid=1542, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 18:41:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5017 states. [2021-08-06 18:41:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5017 to 3435. [2021-08-06 18:41:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3427 states have (on average 1.289757805660928) internal successors, (4420), 3434 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4420 transitions. [2021-08-06 18:41:30,876 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4420 transitions. Word has length 72 [2021-08-06 18:41:30,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:30,876 INFO L470 AbstractCegarLoop]: Abstraction has 3435 states and 4420 transitions. [2021-08-06 18:41:30,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4420 transitions. [2021-08-06 18:41:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:30,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:30,878 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:41:30,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 18:41:31,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:31,079 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:31,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1394666171, now seen corresponding path program 88 times [2021-08-06 18:41:31,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:31,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002998444] [2021-08-06 18:41:31,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:31,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:31,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:31,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:31,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:31,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:31,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:31,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:31,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:31,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002998444] [2021-08-06 18:41:31,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002998444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:31,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671116424] [2021-08-06 18:41:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:41:31,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:31,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:31,264 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:31,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 18:41:37,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:41:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:37,377 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:37,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:38,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:38,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:38,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671116424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:38,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:38,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:38,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384076585] [2021-08-06 18:41:38,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:38,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:38,040 INFO L87 Difference]: Start difference. First operand 3435 states and 4420 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:38,616 INFO L93 Difference]: Finished difference Result 5139 states and 6442 transitions. [2021-08-06 18:41:38,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:41:38,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:38,621 INFO L225 Difference]: With dead ends: 5139 [2021-08-06 18:41:38,621 INFO L226 Difference]: Without dead ends: 4960 [2021-08-06 18:41:38,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=578, Invalid=1492, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 18:41:38,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2021-08-06 18:41:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 3455. [2021-08-06 18:41:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3447 states have (on average 1.2874963736582536) internal successors, (4438), 3454 states have internal predecessors, (4438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 4438 transitions. [2021-08-06 18:41:38,649 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 4438 transitions. Word has length 72 [2021-08-06 18:41:38,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:38,650 INFO L470 AbstractCegarLoop]: Abstraction has 3455 states and 4438 transitions. [2021-08-06 18:41:38,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 4438 transitions. [2021-08-06 18:41:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:38,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:38,652 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:41:38,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 18:41:38,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 18:41:38,861 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:38,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1656114629, now seen corresponding path program 89 times [2021-08-06 18:41:38,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:38,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087862092] [2021-08-06 18:41:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:38,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:38,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:38,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:38,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:38,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:39,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:39,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:39,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:39,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087862092] [2021-08-06 18:41:39,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087862092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:39,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156514792] [2021-08-06 18:41:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:41:39,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:39,037 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:39,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 18:41:45,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:41:45,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:45,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:45,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:45,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:45,878 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:45,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156514792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:45,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:45,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:45,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882508470] [2021-08-06 18:41:45,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:45,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:45,883 INFO L87 Difference]: Start difference. First operand 3455 states and 4438 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:46,347 INFO L93 Difference]: Finished difference Result 4926 states and 6202 transitions. [2021-08-06 18:41:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 18:41:46,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:46,352 INFO L225 Difference]: With dead ends: 4926 [2021-08-06 18:41:46,352 INFO L226 Difference]: Without dead ends: 4814 [2021-08-06 18:41:46,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1375, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:41:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-08-06 18:41:46,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 3465. [2021-08-06 18:41:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3457 states have (on average 1.2910037604859705) internal successors, (4463), 3464 states have internal predecessors, (4463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 4463 transitions. [2021-08-06 18:41:46,380 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 4463 transitions. Word has length 72 [2021-08-06 18:41:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:46,380 INFO L470 AbstractCegarLoop]: Abstraction has 3465 states and 4463 transitions. [2021-08-06 18:41:46,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 4463 transitions. [2021-08-06 18:41:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:46,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:46,383 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:46,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 18:41:46,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 18:41:46,583 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:46,584 INFO L82 PathProgramCache]: Analyzing trace with hash 420201017, now seen corresponding path program 90 times [2021-08-06 18:41:46,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:46,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312579506] [2021-08-06 18:41:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:46,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:46,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:46,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:46,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:46,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:46,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:46,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:46,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:46,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312579506] [2021-08-06 18:41:46,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312579506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:46,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742707175] [2021-08-06 18:41:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:41:46,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:46,854 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:46,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 18:41:52,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:41:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:41:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:41:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:41:53,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:53,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:41:53,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:53,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:41:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:53,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742707175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:53,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:41:53,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:41:53,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648444237] [2021-08-06 18:41:53,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:41:53,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:41:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:41:53,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:41:53,773 INFO L87 Difference]: Start difference. First operand 3465 states and 4463 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:41:54,357 INFO L93 Difference]: Finished difference Result 5026 states and 6324 transitions. [2021-08-06 18:41:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:41:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:41:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:41:54,362 INFO L225 Difference]: With dead ends: 5026 [2021-08-06 18:41:54,362 INFO L226 Difference]: Without dead ends: 4884 [2021-08-06 18:41:54,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=513, Invalid=1379, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 18:41:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2021-08-06 18:41:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 3410. [2021-08-06 18:41:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3402 states have (on average 1.29129923574368) internal successors, (4393), 3409 states have internal predecessors, (4393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 4393 transitions. [2021-08-06 18:41:54,396 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 4393 transitions. Word has length 72 [2021-08-06 18:41:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:41:54,396 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 4393 transitions. [2021-08-06 18:41:54,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:41:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 4393 transitions. [2021-08-06 18:41:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:41:54,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:41:54,399 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:41:54,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 18:41:54,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 18:41:54,599 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:41:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:41:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -222077487, now seen corresponding path program 91 times [2021-08-06 18:41:54,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:41:54,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005102578] [2021-08-06 18:41:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:41:54,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:41:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:41:54,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:54,655 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:41:54,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:54,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:41:54,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:54,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:41:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:41:54,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:41:54,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005102578] [2021-08-06 18:41:54,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005102578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:41:54,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720102004] [2021-08-06 18:41:54,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:41:54,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:41:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:41:54,788 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:41:54,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 18:42:00,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:00,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:00,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:01,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:01,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:01,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:01,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:01,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720102004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:01,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:01,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:01,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033758883] [2021-08-06 18:42:01,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:01,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:01,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:01,938 INFO L87 Difference]: Start difference. First operand 3410 states and 4393 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:02,433 INFO L93 Difference]: Finished difference Result 5004 states and 6273 transitions. [2021-08-06 18:42:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:42:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:02,439 INFO L225 Difference]: With dead ends: 5004 [2021-08-06 18:42:02,439 INFO L226 Difference]: Without dead ends: 4932 [2021-08-06 18:42:02,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 18:42:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-08-06 18:42:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 3385. [2021-08-06 18:42:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3377 states have (on average 1.2919751258513474) internal successors, (4363), 3384 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 4363 transitions. [2021-08-06 18:42:02,468 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 4363 transitions. Word has length 72 [2021-08-06 18:42:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:02,468 INFO L470 AbstractCegarLoop]: Abstraction has 3385 states and 4363 transitions. [2021-08-06 18:42:02,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 4363 transitions. [2021-08-06 18:42:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:02,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:02,470 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:42:02,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 18:42:02,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 18:42:02,672 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:02,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2048380627, now seen corresponding path program 92 times [2021-08-06 18:42:02,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:02,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68738976] [2021-08-06 18:42:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:02,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:02,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:42:02,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 71.4 percent of original size [2021-08-06 18:42:02,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:42:02,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 75.0 percent of original size [2021-08-06 18:42:02,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:02,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:02,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:02,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68738976] [2021-08-06 18:42:02,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68738976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:02,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54527072] [2021-08-06 18:42:02,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:42:02,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:02,861 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:02,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 18:42:09,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:42:09,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:09,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:09,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:09,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:42:09,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:09,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54527072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:09,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:09,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:09,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550985688] [2021-08-06 18:42:09,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:09,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:09,937 INFO L87 Difference]: Start difference. First operand 3385 states and 4363 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:10,383 INFO L93 Difference]: Finished difference Result 4804 states and 6034 transitions. [2021-08-06 18:42:10,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:42:10,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:10,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:10,388 INFO L225 Difference]: With dead ends: 4804 [2021-08-06 18:42:10,388 INFO L226 Difference]: Without dead ends: 4727 [2021-08-06 18:42:10,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=404, Invalid=1156, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 18:42:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2021-08-06 18:42:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 3365. [2021-08-06 18:42:10,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3357 states have (on average 1.2874590408102473) internal successors, (4322), 3364 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 4322 transitions. [2021-08-06 18:42:10,418 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 4322 transitions. Word has length 72 [2021-08-06 18:42:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:10,418 INFO L470 AbstractCegarLoop]: Abstraction has 3365 states and 4322 transitions. [2021-08-06 18:42:10,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 4322 transitions. [2021-08-06 18:42:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:10,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:10,420 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:42:10,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 18:42:10,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:10,621 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:10,621 INFO L82 PathProgramCache]: Analyzing trace with hash -256355261, now seen corresponding path program 93 times [2021-08-06 18:42:10,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:10,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659588274] [2021-08-06 18:42:10,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:10,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:10,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:10,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:10,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:42:10,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 18:42:10,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:10,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:10,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:10,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659588274] [2021-08-06 18:42:10,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659588274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:10,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418248156] [2021-08-06 18:42:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:42:10,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:10,794 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:10,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 18:42:17,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:42:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:17,848 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:17,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:17,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418248156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:17,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:17,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:17,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859976105] [2021-08-06 18:42:17,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:17,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:17,854 INFO L87 Difference]: Start difference. First operand 3365 states and 4322 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:18,285 INFO L93 Difference]: Finished difference Result 4864 states and 6135 transitions. [2021-08-06 18:42:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 18:42:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:18,290 INFO L225 Difference]: With dead ends: 4864 [2021-08-06 18:42:18,290 INFO L226 Difference]: Without dead ends: 4787 [2021-08-06 18:42:18,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 18:42:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2021-08-06 18:42:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 3330. [2021-08-06 18:42:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3322 states have (on average 1.2886815171583383) internal successors, (4281), 3329 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4281 transitions. [2021-08-06 18:42:18,317 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4281 transitions. Word has length 72 [2021-08-06 18:42:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:18,317 INFO L470 AbstractCegarLoop]: Abstraction has 3330 states and 4281 transitions. [2021-08-06 18:42:18,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4281 transitions. [2021-08-06 18:42:18,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:18,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:18,319 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:42:18,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 18:42:18,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:18,520 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:18,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1264167155, now seen corresponding path program 94 times [2021-08-06 18:42:18,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:18,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911785836] [2021-08-06 18:42:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:18,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:18,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:18,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 18:42:18,627 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:18,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:18,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:18,641 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:18,655 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:18,656 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:18,670 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:18,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:18,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:18,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911785836] [2021-08-06 18:42:18,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911785836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:18,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709774896] [2021-08-06 18:42:18,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:42:18,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:18,697 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:18,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 18:42:25,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:42:25,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:25,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:25,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:25,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709774896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:25,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:25,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:25,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668327187] [2021-08-06 18:42:25,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:25,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:25,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:25,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:25,846 INFO L87 Difference]: Start difference. First operand 3330 states and 4281 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:26,666 INFO L93 Difference]: Finished difference Result 7069 states and 8760 transitions. [2021-08-06 18:42:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 18:42:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:26,673 INFO L225 Difference]: With dead ends: 7069 [2021-08-06 18:42:26,674 INFO L226 Difference]: Without dead ends: 6857 [2021-08-06 18:42:26,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 871.8ms TimeCoverageRelationStatistics Valid=678, Invalid=2514, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 18:42:26,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2021-08-06 18:42:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 3346. [2021-08-06 18:42:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3346 states, 3338 states have (on average 1.2884961054523667) internal successors, (4301), 3345 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:26,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3346 states to 3346 states and 4301 transitions. [2021-08-06 18:42:26,715 INFO L78 Accepts]: Start accepts. Automaton has 3346 states and 4301 transitions. Word has length 72 [2021-08-06 18:42:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:26,715 INFO L470 AbstractCegarLoop]: Abstraction has 3346 states and 4301 transitions. [2021-08-06 18:42:26,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3346 states and 4301 transitions. [2021-08-06 18:42:26,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:26,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:26,719 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:42:26,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 18:42:26,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:26,919 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1273243005, now seen corresponding path program 95 times [2021-08-06 18:42:26,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:26,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041934080] [2021-08-06 18:42:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:26,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:27,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:27,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:27,040 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:27,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:27,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:27,056 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:27,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:27,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:27,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:27,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041934080] [2021-08-06 18:42:27,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041934080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:27,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510657852] [2021-08-06 18:42:27,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:42:27,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:27,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:27,097 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:27,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 18:42:33,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:42:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:34,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:34,342 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:34,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510657852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:34,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:34,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:34,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555413133] [2021-08-06 18:42:34,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:34,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:34,350 INFO L87 Difference]: Start difference. First operand 3346 states and 4301 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:35,860 INFO L93 Difference]: Finished difference Result 7748 states and 9617 transitions. [2021-08-06 18:42:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 18:42:35,861 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:35,868 INFO L225 Difference]: With dead ends: 7748 [2021-08-06 18:42:35,869 INFO L226 Difference]: Without dead ends: 7536 [2021-08-06 18:42:35,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1498.0ms TimeCoverageRelationStatistics Valid=1044, Invalid=3512, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 18:42:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2021-08-06 18:42:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 3321. [2021-08-06 18:42:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3313 states have (on average 1.2888620585571988) internal successors, (4270), 3320 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 4270 transitions. [2021-08-06 18:42:35,908 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 4270 transitions. Word has length 72 [2021-08-06 18:42:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:35,909 INFO L470 AbstractCegarLoop]: Abstraction has 3321 states and 4270 transitions. [2021-08-06 18:42:35,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 4270 transitions. [2021-08-06 18:42:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:35,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:35,911 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:35,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 18:42:36,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:36,112 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:36,112 INFO L82 PathProgramCache]: Analyzing trace with hash 2047137473, now seen corresponding path program 96 times [2021-08-06 18:42:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:36,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074159457] [2021-08-06 18:42:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:36,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:36,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:42:36,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:42:36,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:36,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:36,329 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:36,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:36,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:36,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074159457] [2021-08-06 18:42:36,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074159457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:36,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139979241] [2021-08-06 18:42:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:42:36,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:36,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:36,356 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:36,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 18:42:42,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:42:42,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:42:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:43,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:43,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139979241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:43,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:43,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464550584] [2021-08-06 18:42:43,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:43,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:42:43,493 INFO L87 Difference]: Start difference. First operand 3321 states and 4270 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:42:45,101 INFO L93 Difference]: Finished difference Result 8002 states and 9913 transitions. [2021-08-06 18:42:45,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 18:42:45,101 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:42:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:42:45,109 INFO L225 Difference]: With dead ends: 8002 [2021-08-06 18:42:45,109 INFO L226 Difference]: Without dead ends: 7702 [2021-08-06 18:42:45,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1598.3ms TimeCoverageRelationStatistics Valid=1319, Invalid=4381, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 18:42:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7702 states. [2021-08-06 18:42:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7702 to 3406. [2021-08-06 18:42:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3398 states have (on average 1.2869334902884049) internal successors, (4373), 3405 states have internal predecessors, (4373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 4373 transitions. [2021-08-06 18:42:45,171 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 4373 transitions. Word has length 72 [2021-08-06 18:42:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:42:45,171 INFO L470 AbstractCegarLoop]: Abstraction has 3406 states and 4373 transitions. [2021-08-06 18:42:45,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:42:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 4373 transitions. [2021-08-06 18:42:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:42:45,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:42:45,173 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:42:45,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 18:42:45,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:45,377 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:42:45,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:42:45,377 INFO L82 PathProgramCache]: Analyzing trace with hash 435224577, now seen corresponding path program 97 times [2021-08-06 18:42:45,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:42:45,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442087731] [2021-08-06 18:42:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:42:45,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:42:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:45,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:45,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:42:45,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:45,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:42:45,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:45,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:42:45,570 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:45,571 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:42:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:45,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:42:45,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442087731] [2021-08-06 18:42:45,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442087731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:45,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619777767] [2021-08-06 18:42:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:42:45,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:42:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:42:45,598 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:42:45,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 18:42:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:42:52,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:42:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:42:56,564 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:56,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:42:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:42:56,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619777767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:42:56,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:42:56,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:42:56,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797042162] [2021-08-06 18:42:56,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:42:56,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:42:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:42:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=463, Unknown=1, NotChecked=0, Total=600 [2021-08-06 18:42:56,570 INFO L87 Difference]: Start difference. First operand 3406 states and 4373 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:39,736 INFO L93 Difference]: Finished difference Result 8660 states and 10729 transitions. [2021-08-06 18:43:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 18:43:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:43:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:39,745 INFO L225 Difference]: With dead ends: 8660 [2021-08-06 18:43:39,745 INFO L226 Difference]: Without dead ends: 8290 [2021-08-06 18:43:39,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 44196.5ms TimeCoverageRelationStatistics Valid=1312, Invalid=4375, Unknown=13, NotChecked=0, Total=5700 [2021-08-06 18:43:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-08-06 18:43:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 3486. [2021-08-06 18:43:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3478 states have (on average 1.2869465209890742) internal successors, (4476), 3485 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 4476 transitions. [2021-08-06 18:43:39,791 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 4476 transitions. Word has length 72 [2021-08-06 18:43:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:39,791 INFO L470 AbstractCegarLoop]: Abstraction has 3486 states and 4476 transitions. [2021-08-06 18:43:39,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 4476 transitions. [2021-08-06 18:43:39,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:43:39,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:39,794 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:43:39,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 18:43:39,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 18:43:39,994 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:43:39,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:39,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1527495217, now seen corresponding path program 98 times [2021-08-06 18:43:39,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:39,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418230810] [2021-08-06 18:43:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:39,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:40,118 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:43:40,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:43:40,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:40,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:40,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:40,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:40,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:40,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418230810] [2021-08-06 18:43:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418230810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:40,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958700267] [2021-08-06 18:43:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:43:40,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:40,177 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:40,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 18:43:46,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:43:46,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:43:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:47,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:47,541 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:47,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958700267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:47,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:47,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:43:47,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508577409] [2021-08-06 18:43:47,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:43:47,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:47,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:43:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:43:47,547 INFO L87 Difference]: Start difference. First operand 3486 states and 4476 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:49,014 INFO L93 Difference]: Finished difference Result 8020 states and 9917 transitions. [2021-08-06 18:43:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 18:43:49,015 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:43:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:49,023 INFO L225 Difference]: With dead ends: 8020 [2021-08-06 18:43:49,023 INFO L226 Difference]: Without dead ends: 7943 [2021-08-06 18:43:49,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1454.6ms TimeCoverageRelationStatistics Valid=1258, Invalid=3854, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 18:43:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7943 states. [2021-08-06 18:43:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7943 to 3506. [2021-08-06 18:43:49,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3498 states have (on average 1.2858776443682105) internal successors, (4498), 3505 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:49,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 4498 transitions. [2021-08-06 18:43:49,064 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 4498 transitions. Word has length 72 [2021-08-06 18:43:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:49,064 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 4498 transitions. [2021-08-06 18:43:49,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 4498 transitions. [2021-08-06 18:43:49,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:43:49,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:49,067 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:43:49,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 18:43:49,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 18:43:49,267 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:43:49,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:49,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1966075581, now seen corresponding path program 99 times [2021-08-06 18:43:49,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:49,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476891375] [2021-08-06 18:43:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:49,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:49,384 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:43:49,385 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 52.9 percent of original size [2021-08-06 18:43:49,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:49,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:49,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:49,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:49,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:49,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476891375] [2021-08-06 18:43:49,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476891375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:49,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671875129] [2021-08-06 18:43:49,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:43:49,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:49,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:49,441 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:49,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 18:43:55,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:43:55,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:43:55,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 18:43:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:43:56,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:43:56,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:43:56,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:56,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:43:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:56,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671875129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:56,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:43:56,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-06 18:43:56,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453404986] [2021-08-06 18:43:56,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 18:43:56,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:43:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 18:43:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:43:56,659 INFO L87 Difference]: Start difference. First operand 3506 states and 4498 transitions. Second operand has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:43:57,808 INFO L93 Difference]: Finished difference Result 7445 states and 9221 transitions. [2021-08-06 18:43:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 18:43:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-06 18:43:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:43:57,816 INFO L225 Difference]: With dead ends: 7445 [2021-08-06 18:43:57,817 INFO L226 Difference]: Without dead ends: 7369 [2021-08-06 18:43:57,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1092.2ms TimeCoverageRelationStatistics Valid=890, Invalid=3666, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 18:43:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7369 states. [2021-08-06 18:43:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7369 to 3536. [2021-08-06 18:43:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 3528 states have (on average 1.2834467120181405) internal successors, (4528), 3535 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:57,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 4528 transitions. [2021-08-06 18:43:57,854 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 4528 transitions. Word has length 72 [2021-08-06 18:43:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:43:57,854 INFO L470 AbstractCegarLoop]: Abstraction has 3536 states and 4528 transitions. [2021-08-06 18:43:57,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.782608695652174) internal successors, (110), 23 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:43:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 4528 transitions. [2021-08-06 18:43:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-06 18:43:57,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:43:57,857 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1] [2021-08-06 18:43:57,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 18:43:58,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 18:43:58,058 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:43:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:43:58,058 INFO L82 PathProgramCache]: Analyzing trace with hash 354162685, now seen corresponding path program 100 times [2021-08-06 18:43:58,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:43:58,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203535497] [2021-08-06 18:43:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:43:58,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:43:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:43:58,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:43:58,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 73.3 percent of original size [2021-08-06 18:43:58,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:43:58,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 69.2 percent of original size [2021-08-06 18:43:58,188 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:58,189 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:43:58,203 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:58,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:43:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:43:58,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:43:58,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203535497] [2021-08-06 18:43:58,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203535497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:43:58,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613418534] [2021-08-06 18:43:58,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:43:58,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:43:58,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:43:58,231 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:43:58,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 18:44:04,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:44:04,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:04,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:44:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:10,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:10,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613418534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:10,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:10,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 18:44:10,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618931397] [2021-08-06 18:44:10,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 18:44:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 18:44:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=467, Unknown=2, NotChecked=0, Total=600 [2021-08-06 18:44:10,354 INFO L87 Difference]: Start difference. First operand 3536 states and 4528 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 18:44:39,513 WARN L223 SmtUtils]: Removed 3 from assertion stack [2021-08-06 18:44:39,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 18:44:39,514 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-06 18:44:39,516 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 18:44:39,516 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 18:44:39,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:39,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:39,715 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3536states) and FLOYD_HOARE automaton (currently 34 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 4076ms.. [2021-08-06 18:44:39,716 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 18:44:39,716 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 18:44:39,720 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 18:44:39,720 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 18:44:39,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 06:44:39 BasicIcfg [2021-08-06 18:44:39,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 18:44:39,723 INFO L168 Benchmark]: Toolchain (without parser) took 714263.92 ms. Allocated memory was 179.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 143.4 MB in the beginning and 647.9 MB in the end (delta: -504.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 179.3 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 439.99 ms. Allocated memory is still 179.3 MB. Free memory was 143.2 MB in the beginning and 160.0 MB in the end (delta: -16.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.51 ms. Allocated memory is still 179.3 MB. Free memory was 160.0 MB in the beginning and 157.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L168 Benchmark]: Boogie Preprocessor took 32.74 ms. Allocated memory is still 179.3 MB. Free memory was 157.9 MB in the beginning and 156.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L168 Benchmark]: RCFGBuilder took 452.43 ms. Allocated memory is still 179.3 MB. Free memory was 156.4 MB in the beginning and 134.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L168 Benchmark]: TraceAbstraction took 713268.04 ms. Allocated memory was 179.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 134.3 MB in the beginning and 647.9 MB in the end (delta: -513.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-06 18:44:39,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 179.3 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 439.99 ms. Allocated memory is still 179.3 MB. Free memory was 143.2 MB in the beginning and 160.0 MB in the end (delta: -16.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 63.51 ms. Allocated memory is still 179.3 MB. Free memory was 160.0 MB in the beginning and 157.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.74 ms. Allocated memory is still 179.3 MB. Free memory was 157.9 MB in the beginning and 156.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 452.43 ms. Allocated memory is still 179.3 MB. Free memory was 156.4 MB in the beginning and 134.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 713268.04 ms. Allocated memory was 179.3 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 134.3 MB in the beginning and 647.9 MB in the end (delta: -513.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2298, positive: 1987, positive conditional: 1987, positive unconditional: 0, negative: 311, negative conditional: 311, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2007, positive: 1987, positive conditional: 0, positive unconditional: 1987, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 374, positive: 371, positive conditional: 0, positive unconditional: 371, 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: 374, positive: 371, positive conditional: 0, positive unconditional: 371, 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: 22, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2007, positive: 1616, positive conditional: 0, positive unconditional: 1616, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 374, unknown conditional: 0, unknown unconditional: 374] , Statistics on independence cache: Total cache size (in pairs): 374, Positive cache size: 371, Positive conditional cache size: 0, Positive unconditional cache size: 371, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 291 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (3536states) and FLOYD_HOARE automaton (currently 34 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 4076ms.. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3536states) and FLOYD_HOARE automaton (currently 34 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 4076ms.. - TimeoutResultAtElement [Line: 721]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3536states) and FLOYD_HOARE automaton (currently 34 states, 25 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 81 for 4076ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 713174.6ms, OverallIterations: 127, TraceHistogramMax: 6, EmptinessCheckTime: 292.9ms, AutomataDifference: 188337.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 197.7ms, PartialOrderReductionTime: 183.7ms, HoareTripleCheckerStatistics: 9836 SDtfs, 87137 SDslu, 107809 SDs, 0 SdLazy, 21255 SolverSat, 9323 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 22900.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12464 GetRequests, 6819 SyntacticMatches, 17 SemanticMatches, 5627 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96505 ImplicationChecksByTransitivity, 185871.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3909occurred in iteration=97, InterpolantAutomatonStates: 4506, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3793.1ms AutomataMinimizationTime, 126 MinimizatonAttempts, 236331 StatesRemovedByMinimization, 126 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1193.1ms SsaConstructionTime, 2870.6ms SatisfiabilityAnalysisTime, 121761.6ms InterpolantComputationTime, 15796 NumberOfCodeBlocks, 15796 NumberOfCodeBlocksAsserted, 467 NumberOfCheckSat, 15548 ConstructedInterpolants, 33 QuantifiedInterpolants, 136897 SizeOfPredicates, 258 NumberOfNonLiveVariables, 18344 ConjunctsInSsa, 1644 ConjunctsInUnsatCore, 248 InterpolantComputations, 8 PerfectInterpolantSequences, 210/7416 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown