/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 11:02:32,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 11:02:32,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 11:02:32,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 11:02:32,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 11:02:32,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 11:02:32,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 11:02:32,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 11:02:32,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 11:02:32,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 11:02:32,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 11:02:32,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 11:02:32,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 11:02:32,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 11:02:32,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 11:02:32,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 11:02:32,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 11:02:32,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 11:02:32,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 11:02:32,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 11:02:32,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 11:02:32,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 11:02:32,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 11:02:32,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 11:02:32,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 11:02:32,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 11:02:32,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 11:02:32,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 11:02:32,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 11:02:32,559 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 11:02:32,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 11:02:32,559 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 11:02:32,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 11:02:32,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 11:02:32,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 11:02:32,562 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 11:02:32,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 11:02:32,562 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 11:02:32,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 11:02:32,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 11:02:32,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:02:32,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 11:02:32,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 11:02:32,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 11:02:32,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 11:02:32,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 11:02:32,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 11:02:32,841 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 11:02:32,842 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 11:02:32,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-08-21 11:02:32,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b464ee5e/290ff6994d99429eab3627bc7bd9e53d/FLAGd24b66c45 [2021-08-21 11:02:33,331 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 11:02:33,331 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-08-21 11:02:33,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b464ee5e/290ff6994d99429eab3627bc7bd9e53d/FLAGd24b66c45 [2021-08-21 11:02:33,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b464ee5e/290ff6994d99429eab3627bc7bd9e53d [2021-08-21 11:02:33,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 11:02:33,407 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 11:02:33,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 11:02:33,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 11:02:33,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 11:02:33,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e3792b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33, skipping insertion in model container [2021-08-21 11:02:33,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 11:02:33,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 11:02:33,728 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i[30927,30940] [2021-08-21 11:02:33,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 11:02:33,738 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 11:02:33,773 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i[30927,30940] [2021-08-21 11:02:33,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 11:02:33,798 INFO L208 MainTranslator]: Completed translation [2021-08-21 11:02:33,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33 WrapperNode [2021-08-21 11:02:33,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 11:02:33,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 11:02:33,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 11:02:33,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 11:02:33,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 11:02:33,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 11:02:33,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 11:02:33,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 11:02:33,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 11:02:33,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 11:02:33,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 11:02:33,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 11:02:33,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (1/1) ... [2021-08-21 11:02:33,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 11:02:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:33,907 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 11:02:33,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 11:02:33,992 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-21 11:02:33,992 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-21 11:02:33,992 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-21 11:02:33,993 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-21 11:02:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 11:02:33,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 11:02:33,994 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 11:02:34,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 11:02:34,305 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-21 11:02:34,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:02:34 BoogieIcfgContainer [2021-08-21 11:02:34,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 11:02:34,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 11:02:34,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 11:02:34,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 11:02:34,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:02:33" (1/3) ... [2021-08-21 11:02:34,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b7d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:02:34, skipping insertion in model container [2021-08-21 11:02:34,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:02:33" (2/3) ... [2021-08-21 11:02:34,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b7d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:02:34, skipping insertion in model container [2021-08-21 11:02:34,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:02:34" (3/3) ... [2021-08-21 11:02:34,315 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-08-21 11:02:34,318 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 11:02:34,319 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 11:02:34,319 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 11:02:34,319 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 11:02:34,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,350 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,350 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,351 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,352 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,352 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,353 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,353 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,354 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,354 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,355 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,355 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,355 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,355 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,356 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,356 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,356 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,356 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,357 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,357 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,357 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,357 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,358 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,358 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,358 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,358 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,358 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,358 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,359 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,359 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,359 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,360 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,361 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,361 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,361 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,361 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,363 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,376 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,376 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,376 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,376 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,377 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,377 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 11:02:34,380 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 11:02:34,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 11:02:34,417 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 11:02:34,417 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 11:02:34,426 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-08-21 11:02:34,486 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 11:02:34,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:34,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:34,499 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:34,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1934908895, now seen corresponding path program 1 times [2021-08-21 11:02:34,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:34,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272266633] [2021-08-21 11:02:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:34,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:34,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:34,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272266633] [2021-08-21 11:02:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272266633] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:34,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:34,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 11:02:34,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126540897] [2021-08-21 11:02:34,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 11:02:34,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 11:02:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 11:02:34,853 INFO L87 Difference]: Start difference. First operand has 933 states, 932 states have (on average 2.9313304721030042) internal successors, (2732), 932 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:34,969 INFO L93 Difference]: Finished difference Result 1756 states and 4724 transitions. [2021-08-21 11:02:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:02:34,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 11:02:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:34,988 INFO L225 Difference]: With dead ends: 1756 [2021-08-21 11:02:34,989 INFO L226 Difference]: Without dead ends: 1425 [2021-08-21 11:02:34,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:02:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-08-21 11:02:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-08-21 11:02:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-08-21 11:02:35,068 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-08-21 11:02:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:35,068 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-08-21 11:02:35,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-08-21 11:02:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 11:02:35,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:35,071 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] [2021-08-21 11:02:35,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 11:02:35,072 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1007583897, now seen corresponding path program 1 times [2021-08-21 11:02:35,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:35,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002155239] [2021-08-21 11:02:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:35,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:35,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:35,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002155239] [2021-08-21 11:02:35,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002155239] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:35,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:35,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:02:35,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665911765] [2021-08-21 11:02:35,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:02:35,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:35,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:02:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:02:35,244 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 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) [2021-08-21 11:02:35,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:35,336 INFO L93 Difference]: Finished difference Result 1809 states and 4788 transitions. [2021-08-21 11:02:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:02:35,336 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 [2021-08-21 11:02:35,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:35,343 INFO L225 Difference]: With dead ends: 1809 [2021-08-21 11:02:35,343 INFO L226 Difference]: Without dead ends: 1505 [2021-08-21 11:02:35,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:02:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-08-21 11:02:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1184. [2021-08-21 11:02:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 2.679628064243449) internal successors, (3170), 1183 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 3170 transitions. [2021-08-21 11:02:35,371 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 3170 transitions. Word has length 37 [2021-08-21 11:02:35,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:35,372 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 3170 transitions. [2021-08-21 11:02:35,372 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) [2021-08-21 11:02:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 3170 transitions. [2021-08-21 11:02:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 11:02:35,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:35,375 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] [2021-08-21 11:02:35,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 11:02:35,377 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:35,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1664778053, now seen corresponding path program 2 times [2021-08-21 11:02:35,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:35,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008774866] [2021-08-21 11:02:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:35,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:35,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:35,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008774866] [2021-08-21 11:02:35,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008774866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:35,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:35,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:02:35,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717076602] [2021-08-21 11:02:35,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:02:35,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:35,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:02:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:02:35,504 INFO L87 Difference]: Start difference. First operand 1184 states and 3170 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) [2021-08-21 11:02:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:35,601 INFO L93 Difference]: Finished difference Result 2065 states and 5492 transitions. [2021-08-21 11:02:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 11:02:35,601 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 [2021-08-21 11:02:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:35,607 INFO L225 Difference]: With dead ends: 2065 [2021-08-21 11:02:35,607 INFO L226 Difference]: Without dead ends: 1734 [2021-08-21 11:02:35,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 11:02:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-08-21 11:02:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1304. [2021-08-21 11:02:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.7206446661550268) internal successors, (3545), 1303 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3545 transitions. [2021-08-21 11:02:35,635 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3545 transitions. Word has length 37 [2021-08-21 11:02:35,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:35,636 INFO L470 AbstractCegarLoop]: Abstraction has 1304 states and 3545 transitions. [2021-08-21 11:02:35,636 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) [2021-08-21 11:02:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3545 transitions. [2021-08-21 11:02:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 11:02:35,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:35,639 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] [2021-08-21 11:02:35,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 11:02:35,639 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1626203799, now seen corresponding path program 1 times [2021-08-21 11:02:35,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:35,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273027948] [2021-08-21 11:02:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:35,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:35,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:35,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273027948] [2021-08-21 11:02:35,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273027948] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:35,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:35,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 11:02:35,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231818262] [2021-08-21 11:02:35,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 11:02:35,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:35,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 11:02:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 11:02:35,764 INFO L87 Difference]: Start difference. First operand 1304 states and 3545 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) [2021-08-21 11:02:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:35,845 INFO L93 Difference]: Finished difference Result 2270 states and 6052 transitions. [2021-08-21 11:02:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 11:02:35,845 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 [2021-08-21 11:02:35,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:35,853 INFO L225 Difference]: With dead ends: 2270 [2021-08-21 11:02:35,853 INFO L226 Difference]: Without dead ends: 2003 [2021-08-21 11:02:35,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 11:02:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-08-21 11:02:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1514. [2021-08-21 11:02:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-08-21 11:02:35,890 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-08-21 11:02:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:35,891 INFO L470 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-08-21 11:02:35,892 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) [2021-08-21 11:02:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-08-21 11:02:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:35,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:35,893 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] [2021-08-21 11:02:35,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 11:02:35,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:35,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1743769903, now seen corresponding path program 1 times [2021-08-21 11:02:35,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:35,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150199590] [2021-08-21 11:02:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:35,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:36,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:36,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150199590] [2021-08-21 11:02:36,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150199590] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:36,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:36,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:02:36,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615645262] [2021-08-21 11:02:36,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:02:36,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:36,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:02:36,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:02:36,009 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 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) [2021-08-21 11:02:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:36,060 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-08-21 11:02:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 11:02:36,060 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 [2021-08-21 11:02:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:36,067 INFO L225 Difference]: With dead ends: 2203 [2021-08-21 11:02:36,067 INFO L226 Difference]: Without dead ends: 2051 [2021-08-21 11:02:36,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 11:02:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-08-21 11:02:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-08-21 11:02:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-08-21 11:02:36,099 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-08-21 11:02:36,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:36,099 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-08-21 11:02:36,099 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) [2021-08-21 11:02:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-08-21 11:02:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:36,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:36,101 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] [2021-08-21 11:02:36,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 11:02:36,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:36,102 INFO L82 PathProgramCache]: Analyzing trace with hash -295330536, now seen corresponding path program 1 times [2021-08-21 11:02:36,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:36,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290766618] [2021-08-21 11:02:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:36,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:36,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:36,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290766618] [2021-08-21 11:02:36,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290766618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:36,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468925654] [2021-08-21 11:02:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:36,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:36,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:36,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:36,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 11:02:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:36,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:02:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:36,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468925654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:36,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 11:02:36,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8049259] [2021-08-21 11:02:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:02:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:02:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:02:36,586 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:36,705 INFO L93 Difference]: Finished difference Result 2651 states and 6900 transitions. [2021-08-21 11:02:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 11:02:36,706 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 [2021-08-21 11:02:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:36,714 INFO L225 Difference]: With dead ends: 2651 [2021-08-21 11:02:36,714 INFO L226 Difference]: Without dead ends: 2171 [2021-08-21 11:02:36,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-08-21 11:02:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-08-21 11:02:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1624. [2021-08-21 11:02:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.654343807763401) internal successors, (4308), 1623 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4308 transitions. [2021-08-21 11:02:36,770 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4308 transitions. Word has length 42 [2021-08-21 11:02:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:36,770 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 4308 transitions. [2021-08-21 11:02:36,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4308 transitions. [2021-08-21 11:02:36,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:36,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:36,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:36,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 11:02:36,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 11:02:36,991 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -443133005, now seen corresponding path program 2 times [2021-08-21 11:02:36,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:36,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529880642] [2021-08-21 11:02:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:36,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:37,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:37,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529880642] [2021-08-21 11:02:37,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529880642] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:37,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:37,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:02:37,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147283749] [2021-08-21 11:02:37,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:02:37,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:37,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:02:37,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:02:37,070 INFO L87 Difference]: Start difference. First operand 1624 states and 4308 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) [2021-08-21 11:02:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:37,161 INFO L93 Difference]: Finished difference Result 2643 states and 6948 transitions. [2021-08-21 11:02:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 11:02:37,162 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 [2021-08-21 11:02:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:37,170 INFO L225 Difference]: With dead ends: 2643 [2021-08-21 11:02:37,170 INFO L226 Difference]: Without dead ends: 2376 [2021-08-21 11:02:37,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:02:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-08-21 11:02:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1654. [2021-08-21 11:02:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 2.6842105263157894) internal successors, (4437), 1653 states have internal predecessors, (4437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 4437 transitions. [2021-08-21 11:02:37,206 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 4437 transitions. Word has length 42 [2021-08-21 11:02:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:37,206 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 4437 transitions. [2021-08-21 11:02:37,207 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) [2021-08-21 11:02:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 4437 transitions. [2021-08-21 11:02:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:37,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:37,209 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] [2021-08-21 11:02:37,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 11:02:37,209 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1570253327, now seen corresponding path program 3 times [2021-08-21 11:02:37,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:37,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810796054] [2021-08-21 11:02:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:37,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:37,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:37,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810796054] [2021-08-21 11:02:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810796054] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 11:02:37,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 11:02:37,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 11:02:37,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844844439] [2021-08-21 11:02:37,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 11:02:37,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:37,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 11:02:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 11:02:37,275 INFO L87 Difference]: Start difference. First operand 1654 states and 4437 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) [2021-08-21 11:02:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:37,408 INFO L93 Difference]: Finished difference Result 3064 states and 8060 transitions. [2021-08-21 11:02:37,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:02:37,409 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 [2021-08-21 11:02:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:37,418 INFO L225 Difference]: With dead ends: 3064 [2021-08-21 11:02:37,418 INFO L226 Difference]: Without dead ends: 2749 [2021-08-21 11:02:37,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-08-21 11:02:37,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 1894. [2021-08-21 11:02:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.6814580031695723) internal successors, (5076), 1893 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5076 transitions. [2021-08-21 11:02:37,454 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5076 transitions. Word has length 42 [2021-08-21 11:02:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:37,454 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 5076 transitions. [2021-08-21 11:02:37,455 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) [2021-08-21 11:02:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5076 transitions. [2021-08-21 11:02:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:37,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:37,456 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] [2021-08-21 11:02:37,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 11:02:37,457 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1017430236, now seen corresponding path program 2 times [2021-08-21 11:02:37,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:37,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190475828] [2021-08-21 11:02:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:37,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:37,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190475828] [2021-08-21 11:02:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190475828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133679830] [2021-08-21 11:02:37,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:37,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:37,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:37,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:37,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 11:02:37,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:37,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:02:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:38,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133679830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:38,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:38,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 11:02:38,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224849311] [2021-08-21 11:02:38,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:02:38,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:38,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:02:38,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:02:38,019 INFO L87 Difference]: Start difference. First operand 1894 states and 5076 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:38,155 INFO L93 Difference]: Finished difference Result 3096 states and 8012 transitions. [2021-08-21 11:02:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:02:38,169 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 [2021-08-21 11:02:38,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:38,178 INFO L225 Difference]: With dead ends: 3096 [2021-08-21 11:02:38,179 INFO L226 Difference]: Without dead ends: 2616 [2021-08-21 11:02:38,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:02:38,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-08-21 11:02:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1939. [2021-08-21 11:02:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.681114551083591) internal successors, (5196), 1938 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 5196 transitions. [2021-08-21 11:02:38,222 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 5196 transitions. Word has length 42 [2021-08-21 11:02:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 5196 transitions. [2021-08-21 11:02:38,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 5196 transitions. [2021-08-21 11:02:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 11:02:38,225 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:38,225 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] [2021-08-21 11:02:38,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:38,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-21 11:02:38,441 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash -357857496, now seen corresponding path program 3 times [2021-08-21 11:02:38,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:38,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543763139] [2021-08-21 11:02:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:38,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:38,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:38,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543763139] [2021-08-21 11:02:38,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543763139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:38,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801005474] [2021-08-21 11:02:38,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:38,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:38,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:38,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 11:02:38,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:02:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:38,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 11:02:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:38,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801005474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:38,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:38,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 11:02:38,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479875090] [2021-08-21 11:02:38,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 11:02:38,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:38,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 11:02:38,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 11:02:38,971 INFO L87 Difference]: Start difference. First operand 1939 states and 5196 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:39,159 INFO L93 Difference]: Finished difference Result 3440 states and 9084 transitions. [2021-08-21 11:02:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:02:39,159 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 [2021-08-21 11:02:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:39,165 INFO L225 Difference]: With dead ends: 3440 [2021-08-21 11:02:39,165 INFO L226 Difference]: Without dead ends: 2906 [2021-08-21 11:02:39,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:02:39,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2021-08-21 11:02:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2113. [2021-08-21 11:02:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7130681818181817) internal successors, (5730), 2112 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5730 transitions. [2021-08-21 11:02:39,210 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5730 transitions. Word has length 42 [2021-08-21 11:02:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:39,210 INFO L470 AbstractCegarLoop]: Abstraction has 2113 states and 5730 transitions. [2021-08-21 11:02:39,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:39,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5730 transitions. [2021-08-21 11:02:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:39,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:39,213 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] [2021-08-21 11:02:39,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:39,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:39,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1295186514, now seen corresponding path program 1 times [2021-08-21 11:02:39,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:39,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055807280] [2021-08-21 11:02:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:39,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:39,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055807280] [2021-08-21 11:02:39,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055807280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:39,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011287914] [2021-08-21 11:02:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:39,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:39,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:39,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:39,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 11:02:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:39,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011287914] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:40,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:40,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:40,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859352432] [2021-08-21 11:02:40,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:40,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:40,019 INFO L87 Difference]: Start difference. First operand 2113 states and 5730 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:40,163 INFO L93 Difference]: Finished difference Result 3333 states and 8707 transitions. [2021-08-21 11:02:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:02:40,164 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 [2021-08-21 11:02:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:40,170 INFO L225 Difference]: With dead ends: 3333 [2021-08-21 11:02:40,170 INFO L226 Difference]: Without dead ends: 2941 [2021-08-21 11:02:40,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:02:40,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-08-21 11:02:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2162. [2021-08-21 11:02:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2161 states have (on average 2.6968995835261453) internal successors, (5828), 2161 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 5828 transitions. [2021-08-21 11:02:40,207 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 5828 transitions. Word has length 47 [2021-08-21 11:02:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:40,207 INFO L470 AbstractCegarLoop]: Abstraction has 2162 states and 5828 transitions. [2021-08-21 11:02:40,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 5828 transitions. [2021-08-21 11:02:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:40,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:40,210 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] [2021-08-21 11:02:40,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:40,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:40,425 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 555482178, now seen corresponding path program 2 times [2021-08-21 11:02:40,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:40,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931278356] [2021-08-21 11:02:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:40,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:40,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:40,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931278356] [2021-08-21 11:02:40,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931278356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:40,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554846613] [2021-08-21 11:02:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:40,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:40,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:40,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:40,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 11:02:40,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:40,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:41,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554846613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:41,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:41,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:41,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392776498] [2021-08-21 11:02:41,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:41,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:41,043 INFO L87 Difference]: Start difference. First operand 2162 states and 5828 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:41,183 INFO L93 Difference]: Finished difference Result 3173 states and 8259 transitions. [2021-08-21 11:02:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 11:02:41,183 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 [2021-08-21 11:02:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:41,189 INFO L225 Difference]: With dead ends: 3173 [2021-08-21 11:02:41,189 INFO L226 Difference]: Without dead ends: 3021 [2021-08-21 11:02:41,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:02:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-08-21 11:02:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2196. [2021-08-21 11:02:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.687015945330296) internal successors, (5898), 2195 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:41,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5898 transitions. [2021-08-21 11:02:41,255 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5898 transitions. Word has length 47 [2021-08-21 11:02:41,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:41,255 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 5898 transitions. [2021-08-21 11:02:41,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5898 transitions. [2021-08-21 11:02:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:41,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:41,258 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:02:41,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:41,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 11:02:41,473 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash -878237628, now seen corresponding path program 3 times [2021-08-21 11:02:41,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:41,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257627246] [2021-08-21 11:02:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:41,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:41,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257627246] [2021-08-21 11:02:41,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257627246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:41,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045480876] [2021-08-21 11:02:41,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:41,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:41,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:41,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 11:02:41,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 11:02:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:41,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:42,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045480876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:42,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:42,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:42,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651980595] [2021-08-21 11:02:42,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:42,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:42,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:42,087 INFO L87 Difference]: Start difference. First operand 2196 states and 5898 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:42,259 INFO L93 Difference]: Finished difference Result 3597 states and 9235 transitions. [2021-08-21 11:02:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:02:42,260 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 [2021-08-21 11:02:42,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:42,266 INFO L225 Difference]: With dead ends: 3597 [2021-08-21 11:02:42,266 INFO L226 Difference]: Without dead ends: 3205 [2021-08-21 11:02:42,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:02:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-08-21 11:02:42,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 2196. [2021-08-21 11:02:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.687015945330296) internal successors, (5898), 2195 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 5898 transitions. [2021-08-21 11:02:42,310 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 5898 transitions. Word has length 47 [2021-08-21 11:02:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:42,310 INFO L470 AbstractCegarLoop]: Abstraction has 2196 states and 5898 transitions. [2021-08-21 11:02:42,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 5898 transitions. [2021-08-21 11:02:42,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:42,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:42,313 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] [2021-08-21 11:02:42,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:42,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:42,530 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:42,530 INFO L82 PathProgramCache]: Analyzing trace with hash -310108718, now seen corresponding path program 4 times [2021-08-21 11:02:42,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:42,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81315700] [2021-08-21 11:02:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:42,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:42,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81315700] [2021-08-21 11:02:42,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81315700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:42,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824612470] [2021-08-21 11:02:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:02:42,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:42,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:42,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 11:02:42,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:02:42,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:42,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:43,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824612470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:43,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:43,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:43,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667112532] [2021-08-21 11:02:43,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:43,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:43,205 INFO L87 Difference]: Start difference. First operand 2196 states and 5898 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:43,477 INFO L93 Difference]: Finished difference Result 4391 states and 11500 transitions. [2021-08-21 11:02:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:02:43,477 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 [2021-08-21 11:02:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:43,484 INFO L225 Difference]: With dead ends: 4391 [2021-08-21 11:02:43,484 INFO L226 Difference]: Without dead ends: 3833 [2021-08-21 11:02:43,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:02:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-08-21 11:02:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-08-21 11:02:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-08-21 11:02:43,521 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-08-21 11:02:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:43,522 INFO L470 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-08-21 11:02:43,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-08-21 11:02:43,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:43,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:43,524 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] [2021-08-21 11:02:43,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:43,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:43,741 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:43,742 INFO L82 PathProgramCache]: Analyzing trace with hash -560647176, now seen corresponding path program 5 times [2021-08-21 11:02:43,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:43,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513458255] [2021-08-21 11:02:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:43,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:43,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:43,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513458255] [2021-08-21 11:02:43,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513458255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:43,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797709970] [2021-08-21 11:02:43,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:02:43,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:43,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:43,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:43,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 11:02:44,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797709970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:44,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:44,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210437301] [2021-08-21 11:02:44,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:44,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:44,408 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:44,642 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-08-21 11:02:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:02:44,642 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 [2021-08-21 11:02:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:44,650 INFO L225 Difference]: With dead ends: 4350 [2021-08-21 11:02:44,650 INFO L226 Difference]: Without dead ends: 3958 [2021-08-21 11:02:44,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:02:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-08-21 11:02:44,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-08-21 11:02:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-08-21 11:02:44,691 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-08-21 11:02:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:44,691 INFO L470 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-08-21 11:02:44,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-08-21 11:02:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 11:02:44,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:44,694 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] [2021-08-21 11:02:44,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:44,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 11:02:44,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:44,908 INFO L82 PathProgramCache]: Analyzing trace with hash 98925564, now seen corresponding path program 6 times [2021-08-21 11:02:44,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:44,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231772589] [2021-08-21 11:02:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:44,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:44,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:44,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231772589] [2021-08-21 11:02:44,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231772589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:44,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801713390] [2021-08-21 11:02:44,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:02:44,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:44,993 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:45,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 11:02:45,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 11:02:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 11:02:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:45,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801713390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:45,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 11:02:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546420865] [2021-08-21 11:02:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 11:02:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 11:02:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 11:02:45,596 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:46,121 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-08-21 11:02:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 11:02:46,121 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 [2021-08-21 11:02:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:46,130 INFO L225 Difference]: With dead ends: 5771 [2021-08-21 11:02:46,131 INFO L226 Difference]: Without dead ends: 4898 [2021-08-21 11:02:46,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:02:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-08-21 11:02:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-08-21 11:02:46,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-08-21 11:02:46,184 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-08-21 11:02:46,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:46,185 INFO L470 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-08-21 11:02:46,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-08-21 11:02:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:46,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:46,188 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] [2021-08-21 11:02:46,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:46,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 11:02:46,406 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1391018205, now seen corresponding path program 7 times [2021-08-21 11:02:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:46,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899030511] [2021-08-21 11:02:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:46,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:46,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:46,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899030511] [2021-08-21 11:02:46,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899030511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:46,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059013954] [2021-08-21 11:02:46,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:02:46,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:46,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:46,490 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:46,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 11:02:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:46,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:47,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059013954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:47,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:47,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:47,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436907748] [2021-08-21 11:02:47,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:47,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:47,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:47,252 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 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) [2021-08-21 11:02:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:47,472 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-08-21 11:02:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:02:47,472 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 [2021-08-21 11:02:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:47,479 INFO L225 Difference]: With dead ends: 4391 [2021-08-21 11:02:47,479 INFO L226 Difference]: Without dead ends: 3999 [2021-08-21 11:02:47,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:02:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-08-21 11:02:47,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-08-21 11:02:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-08-21 11:02:47,522 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-08-21 11:02:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:47,522 INFO L470 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-08-21 11:02:47,522 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) [2021-08-21 11:02:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-08-21 11:02:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:47,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:47,526 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] [2021-08-21 11:02:47,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:47,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 11:02:47,741 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1042815767, now seen corresponding path program 1 times [2021-08-21 11:02:47,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:47,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558375166] [2021-08-21 11:02:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:47,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:47,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:47,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558375166] [2021-08-21 11:02:47,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558375166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:47,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855297238] [2021-08-21 11:02:47,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:47,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:47,824 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:47,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 11:02:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:48,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:48,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:48,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855297238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:48,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:48,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:48,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112980924] [2021-08-21 11:02:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:48,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:48,521 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 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) [2021-08-21 11:02:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:48,692 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-08-21 11:02:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:02:48,693 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 [2021-08-21 11:02:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:48,698 INFO L225 Difference]: With dead ends: 4087 [2021-08-21 11:02:48,698 INFO L226 Difference]: Without dead ends: 3935 [2021-08-21 11:02:48,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:02:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-08-21 11:02:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2982. [2021-08-21 11:02:48,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-08-21 11:02:48,736 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-08-21 11:02:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:48,736 INFO L470 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-08-21 11:02:48,736 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) [2021-08-21 11:02:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-08-21 11:02:48,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:48,740 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:48,740 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] [2021-08-21 11:02:48,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:48,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 11:02:48,956 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:48,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:48,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1516143985, now seen corresponding path program 2 times [2021-08-21 11:02:48,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:48,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591909285] [2021-08-21 11:02:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:48,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:49,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:49,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591909285] [2021-08-21 11:02:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591909285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:49,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662528718] [2021-08-21 11:02:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:49,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:49,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:49,057 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:49,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 11:02:49,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:49,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:49,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662528718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:49,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:49,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:49,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914649295] [2021-08-21 11:02:49,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:49,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:49,833 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 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) [2021-08-21 11:02:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:49,968 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-08-21 11:02:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 11:02:49,969 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 [2021-08-21 11:02:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:49,974 INFO L225 Difference]: With dead ends: 3927 [2021-08-21 11:02:49,974 INFO L226 Difference]: Without dead ends: 3775 [2021-08-21 11:02:49,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:02:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-08-21 11:02:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2981. [2021-08-21 11:02:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-08-21 11:02:50,018 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-08-21 11:02:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-08-21 11:02:50,018 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) [2021-08-21 11:02:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-08-21 11:02:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:50,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:50,023 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] [2021-08-21 11:02:50,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:50,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:50,241 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:50,242 INFO L82 PathProgramCache]: Analyzing trace with hash 288934477, now seen corresponding path program 8 times [2021-08-21 11:02:50,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:50,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066906846] [2021-08-21 11:02:50,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:50,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:50,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:50,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066906846] [2021-08-21 11:02:50,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066906846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:50,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356974351] [2021-08-21 11:02:50,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:02:50,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:50,372 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:50,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 11:02:50,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:02:50,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:51,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356974351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:51,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:51,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:51,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933941985] [2021-08-21 11:02:51,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:51,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:51,220 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 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) [2021-08-21 11:02:51,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:51,445 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-08-21 11:02:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:02:51,446 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 [2021-08-21 11:02:51,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:51,452 INFO L225 Difference]: With dead ends: 4796 [2021-08-21 11:02:51,452 INFO L226 Difference]: Without dead ends: 4404 [2021-08-21 11:02:51,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-08-21 11:02:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-08-21 11:02:51,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-08-21 11:02:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-08-21 11:02:51,529 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-08-21 11:02:51,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:51,530 INFO L470 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-08-21 11:02:51,530 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) [2021-08-21 11:02:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-08-21 11:02:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:51,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:51,533 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] [2021-08-21 11:02:51,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:51,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-08-21 11:02:51,766 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:51,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1432623815, now seen corresponding path program 9 times [2021-08-21 11:02:51,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:51,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751501249] [2021-08-21 11:02:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:51,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:51,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:51,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751501249] [2021-08-21 11:02:51,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751501249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:51,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100212187] [2021-08-21 11:02:51,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:51,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:51,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:51,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:51,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 11:02:52,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:02:52,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:52,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:52,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100212187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:52,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:52,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 11:02:52,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553262080] [2021-08-21 11:02:52,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 11:02:52,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 11:02:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-21 11:02:52,633 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 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) [2021-08-21 11:02:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:52,964 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-08-21 11:02:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:02:52,965 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 [2021-08-21 11:02:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:52,971 INFO L225 Difference]: With dead ends: 5543 [2021-08-21 11:02:52,972 INFO L226 Difference]: Without dead ends: 5063 [2021-08-21 11:02:52,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:02:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-08-21 11:02:53,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-08-21 11:02:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-08-21 11:02:53,066 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-08-21 11:02:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:53,066 INFO L470 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-08-21 11:02:53,067 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) [2021-08-21 11:02:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-08-21 11:02:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:53,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:53,070 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] [2021-08-21 11:02:53,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:53,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:53,285 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:53,285 INFO L82 PathProgramCache]: Analyzing trace with hash -773051075, now seen corresponding path program 10 times [2021-08-21 11:02:53,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:53,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347774908] [2021-08-21 11:02:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:53,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:53,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:53,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347774908] [2021-08-21 11:02:53,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347774908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:53,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341232591] [2021-08-21 11:02:53,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:02:53,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:53,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:53,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:53,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 11:02:53,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:02:53,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:53,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:53,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:54,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341232591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:54,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:54,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:54,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859881608] [2021-08-21 11:02:54,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:54,214 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 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) [2021-08-21 11:02:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:54,680 INFO L93 Difference]: Finished difference Result 6220 states and 16674 transitions. [2021-08-21 11:02:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 11:02:54,680 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 [2021-08-21 11:02:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:54,687 INFO L225 Difference]: With dead ends: 6220 [2021-08-21 11:02:54,687 INFO L226 Difference]: Without dead ends: 5544 [2021-08-21 11:02:54,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:02:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-08-21 11:02:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 3235. [2021-08-21 11:02:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:54,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-08-21 11:02:54,739 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-08-21 11:02:54,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:54,739 INFO L470 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-08-21 11:02:54,739 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) [2021-08-21 11:02:54,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-08-21 11:02:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:54,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:54,743 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] [2021-08-21 11:02:54,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:54,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:54,962 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:54,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2127839103, now seen corresponding path program 3 times [2021-08-21 11:02:54,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:54,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674232741] [2021-08-21 11:02:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:54,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:54,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:55,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:55,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674232741] [2021-08-21 11:02:55,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674232741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:55,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464200391] [2021-08-21 11:02:55,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:02:55,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:55,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:55,065 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:55,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 11:02:55,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:02:55,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:55,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:55,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464200391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:55,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:55,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:55,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131326136] [2021-08-21 11:02:55,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:55,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:55,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:55,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:55,961 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 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) [2021-08-21 11:02:56,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:56,249 INFO L93 Difference]: Finished difference Result 5014 states and 13181 transitions. [2021-08-21 11:02:56,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:02:56,249 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 [2021-08-21 11:02:56,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:56,255 INFO L225 Difference]: With dead ends: 5014 [2021-08-21 11:02:56,255 INFO L226 Difference]: Without dead ends: 4862 [2021-08-21 11:02:56,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:02:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-08-21 11:02:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 3275. [2021-08-21 11:02:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 2.775809407452657) internal successors, (9088), 3274 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-08-21 11:02:56,299 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-08-21 11:02:56,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:56,299 INFO L470 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-08-21 11:02:56,299 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) [2021-08-21 11:02:56,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-08-21 11:02:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:56,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:56,303 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] [2021-08-21 11:02:56,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 11:02:56,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 11:02:56,520 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:56,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1001785285, now seen corresponding path program 4 times [2021-08-21 11:02:56,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:56,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763736186] [2021-08-21 11:02:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:56,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:56,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:56,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763736186] [2021-08-21 11:02:56,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763736186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:56,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839127586] [2021-08-21 11:02:56,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:02:56,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:56,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:56,597 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:56,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 11:02:57,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:02:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:57,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839127586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:57,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:57,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:57,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506693490] [2021-08-21 11:02:57,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:57,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:57,468 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 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) [2021-08-21 11:02:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:57,782 INFO L93 Difference]: Finished difference Result 5278 states and 14184 transitions. [2021-08-21 11:02:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:02:57,783 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 [2021-08-21 11:02:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:57,789 INFO L225 Difference]: With dead ends: 5278 [2021-08-21 11:02:57,789 INFO L226 Difference]: Without dead ends: 5126 [2021-08-21 11:02:57,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:02:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-08-21 11:02:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3363. [2021-08-21 11:02:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-08-21 11:02:57,833 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-08-21 11:02:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:57,834 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-08-21 11:02:57,834 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) [2021-08-21 11:02:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-08-21 11:02:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 11:02:57,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:57,837 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] [2021-08-21 11:02:57,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-21 11:02:58,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:58,053 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1661358025, now seen corresponding path program 5 times [2021-08-21 11:02:58,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:58,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220818030] [2021-08-21 11:02:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:58,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:02:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:58,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:02:58,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220818030] [2021-08-21 11:02:58,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220818030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:58,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406216939] [2021-08-21 11:02:58,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:02:58,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:58,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:02:58,145 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:02:58,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 11:02:58,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:02:58,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:02:58,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 11:02:58,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:02:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:02:59,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406216939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:02:59,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:02:59,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 11:02:59,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596734268] [2021-08-21 11:02:59,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 11:02:59,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:02:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 11:02:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-21 11:02:59,117 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 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) [2021-08-21 11:02:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:02:59,670 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-08-21 11:02:59,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:02:59,671 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 [2021-08-21 11:02:59,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:02:59,679 INFO L225 Difference]: With dead ends: 6683 [2021-08-21 11:02:59,679 INFO L226 Difference]: Without dead ends: 6253 [2021-08-21 11:02:59,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 11:02:59,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-08-21 11:02:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-08-21 11:02:59,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:02:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-08-21 11:02:59,732 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-08-21 11:02:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:02:59,732 INFO L470 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-08-21 11:02:59,732 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) [2021-08-21 11:02:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-08-21 11:02:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:02:59,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:02:59,736 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] [2021-08-21 11:02:59,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 11:02:59,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:02:59,954 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:02:59,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:02:59,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1423398322, now seen corresponding path program 11 times [2021-08-21 11:02:59,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:02:59,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092254658] [2021-08-21 11:02:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:02:59,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:02:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:00,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:00,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092254658] [2021-08-21 11:03:00,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092254658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:00,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937006842] [2021-08-21 11:03:00,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:00,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:00,093 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:00,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 11:03:00,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:03:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937006842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:01,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:01,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444683510] [2021-08-21 11:03:01,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:01,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:01,171 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 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) [2021-08-21 11:03:01,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:01,340 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-08-21 11:03:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 11:03:01,340 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 [2021-08-21 11:03:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:01,346 INFO L225 Difference]: With dead ends: 4779 [2021-08-21 11:03:01,346 INFO L226 Difference]: Without dead ends: 4627 [2021-08-21 11:03:01,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-08-21 11:03:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-08-21 11:03:01,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-08-21 11:03:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:01,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-08-21 11:03:01,427 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-08-21 11:03:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:01,427 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-08-21 11:03:01,427 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) [2021-08-21 11:03:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-08-21 11:03:01,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:01,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:01,431 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] [2021-08-21 11:03:01,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:01,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:01,641 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash 427270370, now seen corresponding path program 12 times [2021-08-21 11:03:01,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:01,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327921153] [2021-08-21 11:03:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:01,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:01,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:01,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327921153] [2021-08-21 11:03:01,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327921153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:01,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65021895] [2021-08-21 11:03:01,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:01,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:01,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:01,777 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:01,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 11:03:02,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:02,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:02,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:02,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65021895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:02,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:02,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:02,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272088455] [2021-08-21 11:03:02,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:02,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:02,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:02,889 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 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) [2021-08-21 11:03:03,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:03,096 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-08-21 11:03:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 11:03:03,096 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 [2021-08-21 11:03:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:03,103 INFO L225 Difference]: With dead ends: 4955 [2021-08-21 11:03:03,103 INFO L226 Difference]: Without dead ends: 4803 [2021-08-21 11:03:03,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:03:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-08-21 11:03:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-08-21 11:03:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-08-21 11:03:03,149 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-08-21 11:03:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:03,149 INFO L470 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-08-21 11:03:03,149 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) [2021-08-21 11:03:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-08-21 11:03:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:03,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:03,153 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] [2021-08-21 11:03:03,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:03,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 11:03:03,371 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1433862954, now seen corresponding path program 6 times [2021-08-21 11:03:03,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:03,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73714774] [2021-08-21 11:03:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:03,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:03,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:03,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73714774] [2021-08-21 11:03:03,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73714774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:03,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943635363] [2021-08-21 11:03:03,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:03,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:03,476 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:03,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 11:03:04,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:03:04,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:04,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:04,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943635363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:04,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:04,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:04,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822046010] [2021-08-21 11:03:04,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:04,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:04,582 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 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) [2021-08-21 11:03:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:04,842 INFO L93 Difference]: Finished difference Result 5339 states and 13949 transitions. [2021-08-21 11:03:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:03:04,842 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 [2021-08-21 11:03:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:04,849 INFO L225 Difference]: With dead ends: 5339 [2021-08-21 11:03:04,849 INFO L226 Difference]: Without dead ends: 4947 [2021-08-21 11:03:04,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:03:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-08-21 11:03:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3582. [2021-08-21 11:03:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 2.7402960067020383) internal successors, (9813), 3581 states have internal predecessors, (9813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 9813 transitions. [2021-08-21 11:03:04,892 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 9813 transitions. Word has length 57 [2021-08-21 11:03:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:04,892 INFO L470 AbstractCegarLoop]: Abstraction has 3582 states and 9813 transitions. [2021-08-21 11:03:04,892 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) [2021-08-21 11:03:04,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 9813 transitions. [2021-08-21 11:03:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:04,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:04,896 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:03:04,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 11:03:05,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 11:03:05,109 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash -960534736, now seen corresponding path program 7 times [2021-08-21 11:03:05,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:05,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843392999] [2021-08-21 11:03:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:05,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:05,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:05,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843392999] [2021-08-21 11:03:05,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843392999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:05,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149220924] [2021-08-21 11:03:05,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:05,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:05,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:05,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 11:03:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:06,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149220924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:06,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:06,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:06,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565370602] [2021-08-21 11:03:06,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:06,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:06,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:06,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:06,453 INFO L87 Difference]: Start difference. First operand 3582 states and 9813 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) [2021-08-21 11:03:06,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:06,687 INFO L93 Difference]: Finished difference Result 4949 states and 13043 transitions. [2021-08-21 11:03:06,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:03:06,687 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 [2021-08-21 11:03:06,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:06,694 INFO L225 Difference]: With dead ends: 4949 [2021-08-21 11:03:06,694 INFO L226 Difference]: Without dead ends: 4797 [2021-08-21 11:03:06,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:03:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-08-21 11:03:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3547. [2021-08-21 11:03:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.745628877608573) internal successors, (9736), 3546 states have internal predecessors, (9736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9736 transitions. [2021-08-21 11:03:06,788 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9736 transitions. Word has length 57 [2021-08-21 11:03:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:06,788 INFO L470 AbstractCegarLoop]: Abstraction has 3547 states and 9736 transitions. [2021-08-21 11:03:06,788 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) [2021-08-21 11:03:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9736 transitions. [2021-08-21 11:03:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:06,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:06,791 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] [2021-08-21 11:03:06,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 11:03:07,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 11:03:07,009 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:07,010 INFO L82 PathProgramCache]: Analyzing trace with hash 91683170, now seen corresponding path program 8 times [2021-08-21 11:03:07,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:07,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274565728] [2021-08-21 11:03:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:07,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:07,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274565728] [2021-08-21 11:03:07,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274565728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3439039] [2021-08-21 11:03:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:07,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:07,101 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:07,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 11:03:07,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:07,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:07,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:08,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3439039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:08,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:08,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:08,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538400330] [2021-08-21 11:03:08,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:08,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:08,320 INFO L87 Difference]: Start difference. First operand 3547 states and 9736 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) [2021-08-21 11:03:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:08,613 INFO L93 Difference]: Finished difference Result 5131 states and 13405 transitions. [2021-08-21 11:03:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:03:08,614 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 [2021-08-21 11:03:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:08,619 INFO L225 Difference]: With dead ends: 5131 [2021-08-21 11:03:08,620 INFO L226 Difference]: Without dead ends: 4979 [2021-08-21 11:03:08,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:03:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-08-21 11:03:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3652. [2021-08-21 11:03:08,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 2.7299370035606683) internal successors, (9967), 3651 states have internal predecessors, (9967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 9967 transitions. [2021-08-21 11:03:08,662 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 9967 transitions. Word has length 57 [2021-08-21 11:03:08,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:08,663 INFO L470 AbstractCegarLoop]: Abstraction has 3652 states and 9967 transitions. [2021-08-21 11:03:08,663 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) [2021-08-21 11:03:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 9967 transitions. [2021-08-21 11:03:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:08,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:08,666 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] [2021-08-21 11:03:08,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:08,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:08,869 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:08,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1953651878, now seen corresponding path program 9 times [2021-08-21 11:03:08,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:08,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573887773] [2021-08-21 11:03:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:08,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:08,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:08,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573887773] [2021-08-21 11:03:08,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573887773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:08,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467480245] [2021-08-21 11:03:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:08,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:08,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:08,981 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:08,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 11:03:09,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:03:09,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:09,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:09,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:10,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467480245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:10,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:10,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:10,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13322938] [2021-08-21 11:03:10,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:10,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:10,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:10,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:10,281 INFO L87 Difference]: Start difference. First operand 3652 states and 9967 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) [2021-08-21 11:03:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:10,626 INFO L93 Difference]: Finished difference Result 5235 states and 13613 transitions. [2021-08-21 11:03:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:03:10,627 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 [2021-08-21 11:03:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:10,633 INFO L225 Difference]: With dead ends: 5235 [2021-08-21 11:03:10,633 INFO L226 Difference]: Without dead ends: 5083 [2021-08-21 11:03:10,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:03:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-08-21 11:03:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3636. [2021-08-21 11:03:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.730123796423659) internal successors, (9924), 3635 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 9924 transitions. [2021-08-21 11:03:10,680 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 9924 transitions. Word has length 57 [2021-08-21 11:03:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:10,680 INFO L470 AbstractCegarLoop]: Abstraction has 3636 states and 9924 transitions. [2021-08-21 11:03:10,680 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) [2021-08-21 11:03:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 9924 transitions. [2021-08-21 11:03:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:10,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:10,684 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] [2021-08-21 11:03:10,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 11:03:10,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:10,897 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash -284017324, now seen corresponding path program 10 times [2021-08-21 11:03:10,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:10,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066518048] [2021-08-21 11:03:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:10,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:10,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:10,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066518048] [2021-08-21 11:03:10,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066518048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:10,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213548913] [2021-08-21 11:03:10,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:10,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:10,991 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:10,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 11:03:11,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:03:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213548913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:12,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:12,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:12,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215146558] [2021-08-21 11:03:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:12,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:12,341 INFO L87 Difference]: Start difference. First operand 3636 states and 9924 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) [2021-08-21 11:03:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:12,684 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-08-21 11:03:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:03:12,684 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 [2021-08-21 11:03:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:12,691 INFO L225 Difference]: With dead ends: 5219 [2021-08-21 11:03:12,691 INFO L226 Difference]: Without dead ends: 5067 [2021-08-21 11:03:12,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:03:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-08-21 11:03:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3581. [2021-08-21 11:03:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 2.7391061452513967) internal successors, (9806), 3580 states have internal predecessors, (9806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 9806 transitions. [2021-08-21 11:03:12,737 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 9806 transitions. Word has length 57 [2021-08-21 11:03:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:12,737 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 9806 transitions. [2021-08-21 11:03:12,737 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) [2021-08-21 11:03:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 9806 transitions. [2021-08-21 11:03:12,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:12,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:12,741 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] [2021-08-21 11:03:12,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:12,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 11:03:12,955 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:12,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1723791004, now seen corresponding path program 13 times [2021-08-21 11:03:12,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:12,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981536576] [2021-08-21 11:03:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:12,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:13,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:13,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981536576] [2021-08-21 11:03:13,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981536576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:13,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527956217] [2021-08-21 11:03:13,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:13,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:13,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:13,046 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:13,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 11:03:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:13,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:14,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527956217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:14,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:14,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:14,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981259773] [2021-08-21 11:03:14,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:14,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:14,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:14,370 INFO L87 Difference]: Start difference. First operand 3581 states and 9806 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) [2021-08-21 11:03:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:14,516 INFO L93 Difference]: Finished difference Result 5043 states and 13229 transitions. [2021-08-21 11:03:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 11:03:14,517 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 [2021-08-21 11:03:14,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:14,523 INFO L225 Difference]: With dead ends: 5043 [2021-08-21 11:03:14,523 INFO L226 Difference]: Without dead ends: 4891 [2021-08-21 11:03:14,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-08-21 11:03:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-08-21 11:03:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-08-21 11:03:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-08-21 11:03:14,564 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-08-21 11:03:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:14,564 INFO L470 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-08-21 11:03:14,564 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) [2021-08-21 11:03:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-08-21 11:03:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:14,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:14,567 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] [2021-08-21 11:03:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:14,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 11:03:14,786 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash 126877688, now seen corresponding path program 14 times [2021-08-21 11:03:14,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:14,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105488666] [2021-08-21 11:03:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:14,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:14,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:14,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105488666] [2021-08-21 11:03:14,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105488666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:14,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959785231] [2021-08-21 11:03:14,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:14,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:14,873 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:14,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 11:03:15,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:15,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:16,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959785231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:16,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:16,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:16,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988366674] [2021-08-21 11:03:16,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:16,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:16,261 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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) [2021-08-21 11:03:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:16,479 INFO L93 Difference]: Finished difference Result 5339 states and 13821 transitions. [2021-08-21 11:03:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:03:16,479 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 [2021-08-21 11:03:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:16,486 INFO L225 Difference]: With dead ends: 5339 [2021-08-21 11:03:16,486 INFO L226 Difference]: Without dead ends: 5187 [2021-08-21 11:03:16,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-08-21 11:03:16,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-08-21 11:03:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3606. [2021-08-21 11:03:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.735367545076283) internal successors, (9861), 3605 states have internal predecessors, (9861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9861 transitions. [2021-08-21 11:03:16,528 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9861 transitions. Word has length 57 [2021-08-21 11:03:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:16,528 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 9861 transitions. [2021-08-21 11:03:16,528 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) [2021-08-21 11:03:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9861 transitions. [2021-08-21 11:03:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:16,531 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:16,531 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] [2021-08-21 11:03:16,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:16,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:16,750 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:16,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1734255636, now seen corresponding path program 11 times [2021-08-21 11:03:16,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:16,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903279661] [2021-08-21 11:03:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:16,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:16,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:16,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903279661] [2021-08-21 11:03:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903279661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:16,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686435566] [2021-08-21 11:03:16,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:16,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:16,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:16,838 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:16,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 11:03:17,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:03:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:18,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686435566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:18,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:18,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:18,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192407751] [2021-08-21 11:03:18,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:18,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:18,265 INFO L87 Difference]: Start difference. First operand 3606 states and 9861 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) [2021-08-21 11:03:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:18,564 INFO L93 Difference]: Finished difference Result 5859 states and 14989 transitions. [2021-08-21 11:03:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:03:18,565 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 [2021-08-21 11:03:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:18,572 INFO L225 Difference]: With dead ends: 5859 [2021-08-21 11:03:18,572 INFO L226 Difference]: Without dead ends: 5467 [2021-08-21 11:03:18,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:03:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-08-21 11:03:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3631. [2021-08-21 11:03:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.73168044077135) internal successors, (9916), 3630 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9916 transitions. [2021-08-21 11:03:18,616 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9916 transitions. Word has length 57 [2021-08-21 11:03:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:18,616 INFO L470 AbstractCegarLoop]: Abstraction has 3631 states and 9916 transitions. [2021-08-21 11:03:18,616 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) [2021-08-21 11:03:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9916 transitions. [2021-08-21 11:03:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:18,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:18,619 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] [2021-08-21 11:03:18,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:18,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:18,841 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1260927418, now seen corresponding path program 12 times [2021-08-21 11:03:18,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:18,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530057572] [2021-08-21 11:03:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:18,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:18,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:18,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530057572] [2021-08-21 11:03:18,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530057572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:18,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472802835] [2021-08-21 11:03:18,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:18,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:18,982 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:18,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 11:03:20,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:20,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:20,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472802835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:20,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774013560] [2021-08-21 11:03:20,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:20,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:20,492 INFO L87 Difference]: Start difference. First operand 3631 states and 9916 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) [2021-08-21 11:03:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:20,772 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-08-21 11:03:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 11:03:20,772 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 [2021-08-21 11:03:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:20,779 INFO L225 Difference]: With dead ends: 5219 [2021-08-21 11:03:20,779 INFO L226 Difference]: Without dead ends: 5067 [2021-08-21 11:03:20,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:03:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-08-21 11:03:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3556. [2021-08-21 11:03:20,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-08-21 11:03:20,824 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-08-21 11:03:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:20,825 INFO L470 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-08-21 11:03:20,825 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) [2021-08-21 11:03:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-08-21 11:03:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:20,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:20,828 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] [2021-08-21 11:03:20,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-21 11:03:21,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:21,042 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:21,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash -480984296, now seen corresponding path program 15 times [2021-08-21 11:03:21,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:21,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645742001] [2021-08-21 11:03:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:21,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:21,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:21,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645742001] [2021-08-21 11:03:21,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645742001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:21,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449165854] [2021-08-21 11:03:21,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:21,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:21,143 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:21,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 11:03:22,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:03:22,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:22,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449165854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:22,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:22,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:22,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088042896] [2021-08-21 11:03:22,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:22,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:22,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:22,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:22,554 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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) [2021-08-21 11:03:22,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:22,730 INFO L93 Difference]: Finished difference Result 5128 states and 13414 transitions. [2021-08-21 11:03:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:03:22,730 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 [2021-08-21 11:03:22,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:22,737 INFO L225 Difference]: With dead ends: 5128 [2021-08-21 11:03:22,737 INFO L226 Difference]: Without dead ends: 4976 [2021-08-21 11:03:22,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-08-21 11:03:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-08-21 11:03:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3531. [2021-08-21 11:03:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-08-21 11:03:22,782 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-08-21 11:03:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:22,782 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-08-21 11:03:22,782 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) [2021-08-21 11:03:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-08-21 11:03:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:22,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:22,785 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] [2021-08-21 11:03:22,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:23,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 11:03:23,004 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1369684396, now seen corresponding path program 16 times [2021-08-21 11:03:23,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:23,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782459483] [2021-08-21 11:03:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:23,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:23,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:23,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782459483] [2021-08-21 11:03:23,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782459483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:23,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208383082] [2021-08-21 11:03:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:23,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:23,092 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:23,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 11:03:24,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:03:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:24,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208383082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:24,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:24,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:24,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530065760] [2021-08-21 11:03:24,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:24,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:24,518 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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) [2021-08-21 11:03:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:24,766 INFO L93 Difference]: Finished difference Result 5384 states and 13926 transitions. [2021-08-21 11:03:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 11:03:24,766 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 [2021-08-21 11:03:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:24,774 INFO L225 Difference]: With dead ends: 5384 [2021-08-21 11:03:24,774 INFO L226 Difference]: Without dead ends: 5232 [2021-08-21 11:03:24,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-08-21 11:03:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-08-21 11:03:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 3556. [2021-08-21 11:03:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-08-21 11:03:24,826 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-08-21 11:03:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:24,826 INFO L470 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-08-21 11:03:24,826 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) [2021-08-21 11:03:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-08-21 11:03:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:24,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:24,829 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] [2021-08-21 11:03:24,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 11:03:25,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 11:03:25,045 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash -669464348, now seen corresponding path program 17 times [2021-08-21 11:03:25,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:25,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797496037] [2021-08-21 11:03:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:25,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:25,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:25,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797496037] [2021-08-21 11:03:25,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797496037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:25,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577028637] [2021-08-21 11:03:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:25,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:25,153 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:25,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 11:03:26,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:03:26,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:26,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577028637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:26,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:26,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:26,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431397261] [2021-08-21 11:03:26,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:26,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:26,671 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 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) [2021-08-21 11:03:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:26,862 INFO L93 Difference]: Finished difference Result 5113 states and 13389 transitions. [2021-08-21 11:03:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 11:03:26,862 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 [2021-08-21 11:03:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:26,870 INFO L225 Difference]: With dead ends: 5113 [2021-08-21 11:03:26,870 INFO L226 Difference]: Without dead ends: 4961 [2021-08-21 11:03:26,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-08-21 11:03:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-08-21 11:03:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3531. [2021-08-21 11:03:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-08-21 11:03:26,919 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-08-21 11:03:26,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:26,919 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-08-21 11:03:26,919 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) [2021-08-21 11:03:26,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-08-21 11:03:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:26,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:26,923 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] [2021-08-21 11:03:26,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 11:03:27,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 11:03:27,124 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1228455760, now seen corresponding path program 18 times [2021-08-21 11:03:27,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:27,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099760527] [2021-08-21 11:03:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:27,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:27,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:27,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099760527] [2021-08-21 11:03:27,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099760527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:27,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362114114] [2021-08-21 11:03:27,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:27,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:27,257 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:27,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 11:03:28,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:28,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:28,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:28,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362114114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:28,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:28,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:28,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319187877] [2021-08-21 11:03:28,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:28,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:28,897 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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) [2021-08-21 11:03:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:29,319 INFO L93 Difference]: Finished difference Result 6967 states and 18576 transitions. [2021-08-21 11:03:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:03:29,319 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 [2021-08-21 11:03:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:29,329 INFO L225 Difference]: With dead ends: 6967 [2021-08-21 11:03:29,329 INFO L226 Difference]: Without dead ends: 6585 [2021-08-21 11:03:29,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:03:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6585 states. [2021-08-21 11:03:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6585 to 3531. [2021-08-21 11:03:29,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-08-21 11:03:29,385 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-08-21 11:03:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-08-21 11:03:29,386 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) [2021-08-21 11:03:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-08-21 11:03:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:29,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:29,389 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] [2021-08-21 11:03:29,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 11:03:29,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 11:03:29,602 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -351873896, now seen corresponding path program 19 times [2021-08-21 11:03:29,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:29,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017614996] [2021-08-21 11:03:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:29,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:29,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:29,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017614996] [2021-08-21 11:03:29,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017614996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:29,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990720563] [2021-08-21 11:03:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:29,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:29,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:29,702 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:29,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 11:03:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:31,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990720563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:31,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:31,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:31,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697017301] [2021-08-21 11:03:31,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:31,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:31,353 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 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) [2021-08-21 11:03:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:31,689 INFO L93 Difference]: Finished difference Result 6346 states and 16792 transitions. [2021-08-21 11:03:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:03:31,690 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 [2021-08-21 11:03:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:31,699 INFO L225 Difference]: With dead ends: 6346 [2021-08-21 11:03:31,699 INFO L226 Difference]: Without dead ends: 6194 [2021-08-21 11:03:31,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:03:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6194 states. [2021-08-21 11:03:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6194 to 3846. [2021-08-21 11:03:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3845 states have (on average 2.7830949284785436) internal successors, (10701), 3845 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 10701 transitions. [2021-08-21 11:03:31,759 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 10701 transitions. Word has length 57 [2021-08-21 11:03:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:31,759 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 10701 transitions. [2021-08-21 11:03:31,759 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) [2021-08-21 11:03:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 10701 transitions. [2021-08-21 11:03:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:31,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:31,763 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] [2021-08-21 11:03:31,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:31,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:31,974 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 307698844, now seen corresponding path program 20 times [2021-08-21 11:03:31,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:31,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369103332] [2021-08-21 11:03:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:31,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:32,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:32,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369103332] [2021-08-21 11:03:32,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369103332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:32,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383769997] [2021-08-21 11:03:32,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:32,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:32,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:32,072 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:32,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 11:03:33,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:33,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:33,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383769997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:33,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:33,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 11:03:33,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996807653] [2021-08-21 11:03:33,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 11:03:33,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 11:03:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-21 11:03:33,724 INFO L87 Difference]: Start difference. First operand 3846 states and 10701 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) [2021-08-21 11:03:34,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:34,297 INFO L93 Difference]: Finished difference Result 8060 states and 21678 transitions. [2021-08-21 11:03:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:03:34,297 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 [2021-08-21 11:03:34,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:34,357 INFO L225 Difference]: With dead ends: 8060 [2021-08-21 11:03:34,357 INFO L226 Difference]: Without dead ends: 7499 [2021-08-21 11:03:34,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=503, Invalid=1567, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:03:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7499 states. [2021-08-21 11:03:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7499 to 3626. [2021-08-21 11:03:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 2.763034482758621) internal successors, (10016), 3625 states have internal predecessors, (10016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 10016 transitions. [2021-08-21 11:03:34,408 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 10016 transitions. Word has length 57 [2021-08-21 11:03:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:34,409 INFO L470 AbstractCegarLoop]: Abstraction has 3626 states and 10016 transitions. [2021-08-21 11:03:34,409 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) [2021-08-21 11:03:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 10016 transitions. [2021-08-21 11:03:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:34,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:34,412 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] [2021-08-21 11:03:34,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:34,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 11:03:34,623 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1086378274, now seen corresponding path program 13 times [2021-08-21 11:03:34,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:34,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467495185] [2021-08-21 11:03:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:34,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:34,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:34,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467495185] [2021-08-21 11:03:34,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467495185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:34,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878298953] [2021-08-21 11:03:34,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:34,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:34,733 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:34,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 11:03:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:36,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878298953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:36,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:36,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:36,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403684415] [2021-08-21 11:03:36,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:36,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:36,403 INFO L87 Difference]: Start difference. First operand 3626 states and 10016 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) [2021-08-21 11:03:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:36,794 INFO L93 Difference]: Finished difference Result 6310 states and 16423 transitions. [2021-08-21 11:03:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:03:36,795 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 [2021-08-21 11:03:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:36,802 INFO L225 Difference]: With dead ends: 6310 [2021-08-21 11:03:36,803 INFO L226 Difference]: Without dead ends: 6158 [2021-08-21 11:03:36,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:03:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-08-21 11:03:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 3991. [2021-08-21 11:03:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3991 states, 3990 states have (on average 2.7897243107769425) internal successors, (11131), 3990 states have internal predecessors, (11131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 11131 transitions. [2021-08-21 11:03:36,851 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 11131 transitions. Word has length 57 [2021-08-21 11:03:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:36,852 INFO L470 AbstractCegarLoop]: Abstraction has 3991 states and 11131 transitions. [2021-08-21 11:03:36,852 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) [2021-08-21 11:03:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 11131 transitions. [2021-08-21 11:03:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:36,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:36,855 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] [2021-08-21 11:03:36,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:37,075 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2082535204, now seen corresponding path program 14 times [2021-08-21 11:03:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:37,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210798668] [2021-08-21 11:03:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:37,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:37,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:37,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:37,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210798668] [2021-08-21 11:03:37,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210798668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:37,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255980335] [2021-08-21 11:03:37,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:37,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:37,161 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 11:03:38,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:38,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:38,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255980335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:38,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:38,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205647899] [2021-08-21 11:03:38,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:38,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:38,858 INFO L87 Difference]: Start difference. First operand 3991 states and 11131 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) [2021-08-21 11:03:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:39,269 INFO L93 Difference]: Finished difference Result 6547 states and 17487 transitions. [2021-08-21 11:03:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:03:39,270 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 [2021-08-21 11:03:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:39,278 INFO L225 Difference]: With dead ends: 6547 [2021-08-21 11:03:39,278 INFO L226 Difference]: Without dead ends: 6395 [2021-08-21 11:03:39,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:03:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2021-08-21 11:03:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 4136. [2021-08-21 11:03:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4136 states, 4135 states have (on average 2.8176541717049575) internal successors, (11651), 4135 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4136 states to 4136 states and 11651 transitions. [2021-08-21 11:03:39,331 INFO L78 Accepts]: Start accepts. Automaton has 4136 states and 11651 transitions. Word has length 57 [2021-08-21 11:03:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:39,331 INFO L470 AbstractCegarLoop]: Abstraction has 4136 states and 11651 transitions. [2021-08-21 11:03:39,332 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) [2021-08-21 11:03:39,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4136 states and 11651 transitions. [2021-08-21 11:03:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:39,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:39,335 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] [2021-08-21 11:03:39,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:39,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:39,553 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1552859352, now seen corresponding path program 15 times [2021-08-21 11:03:39,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:39,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865067354] [2021-08-21 11:03:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:39,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:39,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:39,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865067354] [2021-08-21 11:03:39,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865067354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:39,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859313551] [2021-08-21 11:03:39,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:39,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:39,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:39,641 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:39,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 11:03:41,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:03:41,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:41,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:41,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859313551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:41,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:41,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:41,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379649281] [2021-08-21 11:03:41,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:41,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:41,363 INFO L87 Difference]: Start difference. First operand 4136 states and 11651 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) [2021-08-21 11:03:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:42,108 INFO L93 Difference]: Finished difference Result 8535 states and 22890 transitions. [2021-08-21 11:03:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:03:42,108 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 [2021-08-21 11:03:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:42,119 INFO L225 Difference]: With dead ends: 8535 [2021-08-21 11:03:42,119 INFO L226 Difference]: Without dead ends: 7977 [2021-08-21 11:03:42,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 651.0ms TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 11:03:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-08-21 11:03:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 3871. [2021-08-21 11:03:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.77312661498708) internal successors, (10732), 3870 states have internal predecessors, (10732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 10732 transitions. [2021-08-21 11:03:42,196 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 10732 transitions. Word has length 57 [2021-08-21 11:03:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:42,196 INFO L470 AbstractCegarLoop]: Abstraction has 3871 states and 10732 transitions. [2021-08-21 11:03:42,196 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) [2021-08-21 11:03:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 10732 transitions. [2021-08-21 11:03:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:42,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:42,199 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] [2021-08-21 11:03:42,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:42,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 11:03:42,417 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1882805754, now seen corresponding path program 16 times [2021-08-21 11:03:42,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:42,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870195845] [2021-08-21 11:03:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:42,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:42,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:42,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870195845] [2021-08-21 11:03:42,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870195845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:42,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068087289] [2021-08-21 11:03:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:42,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:42,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:42,509 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:42,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 11:03:43,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:03:43,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:43,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:43,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:44,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068087289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:44,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:44,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:44,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565548064] [2021-08-21 11:03:44,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:44,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:44,334 INFO L87 Difference]: Start difference. First operand 3871 states and 10732 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) [2021-08-21 11:03:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:44,762 INFO L93 Difference]: Finished difference Result 6592 states and 17051 transitions. [2021-08-21 11:03:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 11:03:44,762 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 [2021-08-21 11:03:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:44,771 INFO L225 Difference]: With dead ends: 6592 [2021-08-21 11:03:44,771 INFO L226 Difference]: Without dead ends: 6440 [2021-08-21 11:03:44,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:03:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6440 states. [2021-08-21 11:03:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6440 to 4091. [2021-08-21 11:03:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4091 states, 4090 states have (on average 2.7863080684596575) internal successors, (11396), 4090 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4091 states to 4091 states and 11396 transitions. [2021-08-21 11:03:44,821 INFO L78 Accepts]: Start accepts. Automaton has 4091 states and 11396 transitions. Word has length 57 [2021-08-21 11:03:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:44,821 INFO L470 AbstractCegarLoop]: Abstraction has 4091 states and 11396 transitions. [2021-08-21 11:03:44,821 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) [2021-08-21 11:03:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 4091 states and 11396 transitions. [2021-08-21 11:03:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:44,824 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:44,824 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] [2021-08-21 11:03:44,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 11:03:45,044 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1507105260, now seen corresponding path program 17 times [2021-08-21 11:03:45,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:45,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554636783] [2021-08-21 11:03:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:45,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:45,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:45,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554636783] [2021-08-21 11:03:45,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554636783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:45,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648545965] [2021-08-21 11:03:45,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:03:45,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:45,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:45,142 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:45,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 11:03:46,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:03:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:46,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:47,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648545965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:47,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:47,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:47,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068146384] [2021-08-21 11:03:47,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:47,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:47,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:47,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:47,022 INFO L87 Difference]: Start difference. First operand 4091 states and 11396 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) [2021-08-21 11:03:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:47,531 INFO L93 Difference]: Finished difference Result 6782 states and 17421 transitions. [2021-08-21 11:03:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 11:03:47,532 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 [2021-08-21 11:03:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:47,542 INFO L225 Difference]: With dead ends: 6782 [2021-08-21 11:03:47,542 INFO L226 Difference]: Without dead ends: 6630 [2021-08-21 11:03:47,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:03:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6630 states. [2021-08-21 11:03:47,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6630 to 4144. [2021-08-21 11:03:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 2.7859039343470915) internal successors, (11542), 4143 states have internal predecessors, (11542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 11542 transitions. [2021-08-21 11:03:47,609 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 11542 transitions. Word has length 57 [2021-08-21 11:03:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:47,609 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 11542 transitions. [2021-08-21 11:03:47,609 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) [2021-08-21 11:03:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 11542 transitions. [2021-08-21 11:03:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:47,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:47,614 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] [2021-08-21 11:03:47,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:47,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 11:03:47,834 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1039088686, now seen corresponding path program 18 times [2021-08-21 11:03:47,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:47,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783169481] [2021-08-21 11:03:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:47,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:47,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:47,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783169481] [2021-08-21 11:03:47,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783169481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:47,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658132330] [2021-08-21 11:03:47,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:03:47,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:47,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:47,925 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:47,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 11:03:49,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:03:49,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:49,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658132330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:49,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:49,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:49,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238290558] [2021-08-21 11:03:49,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:49,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:49,823 INFO L87 Difference]: Start difference. First operand 4144 states and 11542 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) [2021-08-21 11:03:50,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:50,365 INFO L93 Difference]: Finished difference Result 6741 states and 17647 transitions. [2021-08-21 11:03:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 11:03:50,365 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 [2021-08-21 11:03:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:50,375 INFO L225 Difference]: With dead ends: 6741 [2021-08-21 11:03:50,375 INFO L226 Difference]: Without dead ends: 6589 [2021-08-21 11:03:50,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:03:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2021-08-21 11:03:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 4249. [2021-08-21 11:03:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 2.803201506591337) internal successors, (11908), 4248 states have internal predecessors, (11908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 11908 transitions. [2021-08-21 11:03:50,440 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 11908 transitions. Word has length 57 [2021-08-21 11:03:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:50,441 INFO L470 AbstractCegarLoop]: Abstraction has 4249 states and 11908 transitions. [2021-08-21 11:03:50,441 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) [2021-08-21 11:03:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 11908 transitions. [2021-08-21 11:03:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:50,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:50,445 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] [2021-08-21 11:03:50,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:50,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 11:03:50,657 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:50,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:50,668 INFO L82 PathProgramCache]: Analyzing trace with hash 2129824792, now seen corresponding path program 19 times [2021-08-21 11:03:50,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:50,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124918177] [2021-08-21 11:03:50,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:50,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:50,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:50,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124918177] [2021-08-21 11:03:50,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124918177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:50,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269624200] [2021-08-21 11:03:50,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:03:50,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:50,785 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:50,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 11:03:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:52,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269624200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:52,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:52,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:52,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584581460] [2021-08-21 11:03:52,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:52,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:52,735 INFO L87 Difference]: Start difference. First operand 4249 states and 11908 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) [2021-08-21 11:03:53,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:53,221 INFO L93 Difference]: Finished difference Result 7064 states and 18951 transitions. [2021-08-21 11:03:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:03:53,222 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 [2021-08-21 11:03:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:53,233 INFO L225 Difference]: With dead ends: 7064 [2021-08-21 11:03:53,233 INFO L226 Difference]: Without dead ends: 6912 [2021-08-21 11:03:53,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=410, Invalid=1312, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:03:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6912 states. [2021-08-21 11:03:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6912 to 4369. [2021-08-21 11:03:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 2.8120421245421245) internal successors, (12283), 4368 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 12283 transitions. [2021-08-21 11:03:53,305 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 12283 transitions. Word has length 57 [2021-08-21 11:03:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:53,305 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 12283 transitions. [2021-08-21 11:03:53,305 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) [2021-08-21 11:03:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 12283 transitions. [2021-08-21 11:03:53,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:53,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:53,310 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] [2021-08-21 11:03:53,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 11:03:53,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:53,525 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1505569764, now seen corresponding path program 20 times [2021-08-21 11:03:53,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:53,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827712736] [2021-08-21 11:03:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:53,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:53,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:53,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827712736] [2021-08-21 11:03:53,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827712736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:53,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956730183] [2021-08-21 11:03:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:03:53,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:53,622 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:03:53,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 11:03:55,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:03:55,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:55,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:55,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956730183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:55,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:55,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:55,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856134578] [2021-08-21 11:03:55,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:55,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:55,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:55,628 INFO L87 Difference]: Start difference. First operand 4369 states and 12283 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) [2021-08-21 11:03:56,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:56,551 INFO L93 Difference]: Finished difference Result 9343 states and 25074 transitions. [2021-08-21 11:03:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 11:03:56,552 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 [2021-08-21 11:03:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:56,564 INFO L225 Difference]: With dead ends: 9343 [2021-08-21 11:03:56,564 INFO L226 Difference]: Without dead ends: 8737 [2021-08-21 11:03:56,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=739, Invalid=2683, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 11:03:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8737 states. [2021-08-21 11:03:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8737 to 4286. [2021-08-21 11:03:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4285 states have (on average 2.779229871645274) internal successors, (11909), 4285 states have internal predecessors, (11909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 11909 transitions. [2021-08-21 11:03:56,638 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 11909 transitions. Word has length 57 [2021-08-21 11:03:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 4286 states and 11909 transitions. [2021-08-21 11:03:56,639 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) [2021-08-21 11:03:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 11909 transitions. [2021-08-21 11:03:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:56,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:56,643 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] [2021-08-21 11:03:56,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 11:03:56,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 11:03:56,857 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -926955930, now seen corresponding path program 21 times [2021-08-21 11:03:56,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:56,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115384357] [2021-08-21 11:03:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:56,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:56,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:56,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115384357] [2021-08-21 11:03:56,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115384357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:56,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331729885] [2021-08-21 11:03:56,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:03:56,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:56,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:56,947 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) [2021-08-21 11:03:56,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 11:03:58,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:03:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:03:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:03:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:03:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:58,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331729885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:58,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:03:58,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:03:58,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147183352] [2021-08-21 11:03:58,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:03:58,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:03:58,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:03:58,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:03:58,894 INFO L87 Difference]: Start difference. First operand 4286 states and 11909 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) [2021-08-21 11:03:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:03:59,515 INFO L93 Difference]: Finished difference Result 7772 states and 20736 transitions. [2021-08-21 11:03:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 11:03:59,515 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 [2021-08-21 11:03:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:03:59,526 INFO L225 Difference]: With dead ends: 7772 [2021-08-21 11:03:59,526 INFO L226 Difference]: Without dead ends: 7620 [2021-08-21 11:03:59,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:03:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2021-08-21 11:03:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 4601. [2021-08-21 11:03:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.807391304347826) internal successors, (12914), 4600 states have internal predecessors, (12914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:03:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 12914 transitions. [2021-08-21 11:03:59,596 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 12914 transitions. Word has length 57 [2021-08-21 11:03:59,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:03:59,596 INFO L470 AbstractCegarLoop]: Abstraction has 4601 states and 12914 transitions. [2021-08-21 11:03:59,596 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) [2021-08-21 11:03:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 12914 transitions. [2021-08-21 11:03:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 11:03:59,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:03:59,600 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] [2021-08-21 11:03:59,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 11:03:59,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:59,817 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:03:59,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:03:59,817 INFO L82 PathProgramCache]: Analyzing trace with hash -267383190, now seen corresponding path program 22 times [2021-08-21 11:03:59,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:03:59,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218397178] [2021-08-21 11:03:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:03:59,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:03:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:03:59,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:03:59,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:03:59,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218397178] [2021-08-21 11:03:59,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218397178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:03:59,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607278157] [2021-08-21 11:03:59,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:03:59,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:03:59,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:03:59,904 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) [2021-08-21 11:03:59,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 11:04:01,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:04:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 11:04:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:01,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607278157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:01,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:01,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 11:04:01,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547429962] [2021-08-21 11:04:01,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 11:04:01,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 11:04:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-08-21 11:04:01,992 INFO L87 Difference]: Start difference. First operand 4601 states and 12914 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) [2021-08-21 11:04:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:03,196 INFO L93 Difference]: Finished difference Result 9919 states and 26549 transitions. [2021-08-21 11:04:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:04:03,196 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 [2021-08-21 11:04:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:03,210 INFO L225 Difference]: With dead ends: 9919 [2021-08-21 11:04:03,210 INFO L226 Difference]: Without dead ends: 9209 [2021-08-21 11:04:03,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 1008.6ms TimeCoverageRelationStatistics Valid=864, Invalid=3168, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:04:03,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2021-08-21 11:04:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 4416. [2021-08-21 11:04:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4416 states, 4415 states have (on average 2.7807474518686295) internal successors, (12277), 4415 states have internal predecessors, (12277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4416 states to 4416 states and 12277 transitions. [2021-08-21 11:04:03,288 INFO L78 Accepts]: Start accepts. Automaton has 4416 states and 12277 transitions. Word has length 57 [2021-08-21 11:04:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:03,289 INFO L470 AbstractCegarLoop]: Abstraction has 4416 states and 12277 transitions. [2021-08-21 11:04:03,289 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) [2021-08-21 11:04:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4416 states and 12277 transitions. [2021-08-21 11:04:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:03,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:03,293 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] [2021-08-21 11:04:03,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:03,514 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,SelfDestructingSolverStorable51 [2021-08-21 11:04:03,515 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:03,515 INFO L82 PathProgramCache]: Analyzing trace with hash -85522207, now seen corresponding path program 23 times [2021-08-21 11:04:03,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:03,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920883097] [2021-08-21 11:04:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:03,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:03,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:03,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920883097] [2021-08-21 11:04:03,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920883097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:03,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498438224] [2021-08-21 11:04:03,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:04:03,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:03,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:03,656 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) [2021-08-21 11:04:03,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 11:04:05,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:04:05,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:05,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498438224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:05,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:05,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:05,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224009456] [2021-08-21 11:04:05,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:05,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:05,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:05,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:05,899 INFO L87 Difference]: Start difference. First operand 4416 states and 12277 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) [2021-08-21 11:04:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:06,243 INFO L93 Difference]: Finished difference Result 6063 states and 15993 transitions. [2021-08-21 11:04:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 11:04:06,243 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 [2021-08-21 11:04:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:06,252 INFO L225 Difference]: With dead ends: 6063 [2021-08-21 11:04:06,252 INFO L226 Difference]: Without dead ends: 5911 [2021-08-21 11:04:06,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-08-21 11:04:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-08-21 11:04:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4491. [2021-08-21 11:04:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 2.771046770601336) internal successors, (12442), 4490 states have internal predecessors, (12442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 12442 transitions. [2021-08-21 11:04:06,408 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 12442 transitions. Word has length 62 [2021-08-21 11:04:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 4491 states and 12442 transitions. [2021-08-21 11:04:06,408 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) [2021-08-21 11:04:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 12442 transitions. [2021-08-21 11:04:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:06,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:06,413 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] [2021-08-21 11:04:06,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 11:04:06,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:06,629 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:06,629 INFO L82 PathProgramCache]: Analyzing trace with hash 846879351, now seen corresponding path program 24 times [2021-08-21 11:04:06,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:06,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266399478] [2021-08-21 11:04:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:06,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:06,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:06,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266399478] [2021-08-21 11:04:06,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266399478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:06,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134853588] [2021-08-21 11:04:06,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:04:06,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:06,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:06,749 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) [2021-08-21 11:04:06,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 11:04:08,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:04:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:08,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:09,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134853588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:09,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:09,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:09,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481018645] [2021-08-21 11:04:09,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:09,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:09,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:09,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:09,037 INFO L87 Difference]: Start difference. First operand 4491 states and 12442 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) [2021-08-21 11:04:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:09,349 INFO L93 Difference]: Finished difference Result 6288 states and 16440 transitions. [2021-08-21 11:04:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 11:04:09,349 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 [2021-08-21 11:04:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:09,357 INFO L225 Difference]: With dead ends: 6288 [2021-08-21 11:04:09,358 INFO L226 Difference]: Without dead ends: 6136 [2021-08-21 11:04:09,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 345.6ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:04:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-08-21 11:04:09,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4506. [2021-08-21 11:04:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 2.7691453940066593) internal successors, (12475), 4505 states have internal predecessors, (12475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:09,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 12475 transitions. [2021-08-21 11:04:09,414 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 12475 transitions. Word has length 62 [2021-08-21 11:04:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:09,414 INFO L470 AbstractCegarLoop]: Abstraction has 4506 states and 12475 transitions. [2021-08-21 11:04:09,414 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) [2021-08-21 11:04:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 12475 transitions. [2021-08-21 11:04:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:09,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:09,418 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] [2021-08-21 11:04:09,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:09,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:09,639 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:09,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1922541821, now seen corresponding path program 25 times [2021-08-21 11:04:09,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:09,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073057144] [2021-08-21 11:04:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:09,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:09,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:09,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073057144] [2021-08-21 11:04:09,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073057144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:09,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119372331] [2021-08-21 11:04:09,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:04:09,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:09,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:09,745 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) [2021-08-21 11:04:09,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 11:04:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:11,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:12,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119372331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:12,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:12,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:12,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054011217] [2021-08-21 11:04:12,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:12,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:12,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:12,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:12,033 INFO L87 Difference]: Start difference. First operand 4506 states and 12475 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) [2021-08-21 11:04:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:12,396 INFO L93 Difference]: Finished difference Result 6357 states and 16571 transitions. [2021-08-21 11:04:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:04:12,396 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 [2021-08-21 11:04:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:12,404 INFO L225 Difference]: With dead ends: 6357 [2021-08-21 11:04:12,404 INFO L226 Difference]: Without dead ends: 6205 [2021-08-21 11:04:12,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 11:04:12,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6205 states. [2021-08-21 11:04:12,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6205 to 4631. [2021-08-21 11:04:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 2.75377969762419) internal successors, (12750), 4630 states have internal predecessors, (12750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 12750 transitions. [2021-08-21 11:04:12,460 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 12750 transitions. Word has length 62 [2021-08-21 11:04:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:12,460 INFO L470 AbstractCegarLoop]: Abstraction has 4631 states and 12750 transitions. [2021-08-21 11:04:12,460 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) [2021-08-21 11:04:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 12750 transitions. [2021-08-21 11:04:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:12,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:12,464 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] [2021-08-21 11:04:12,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:12,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 11:04:12,685 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1996724981, now seen corresponding path program 26 times [2021-08-21 11:04:12,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:12,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307419830] [2021-08-21 11:04:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:12,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:12,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:12,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307419830] [2021-08-21 11:04:12,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307419830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:12,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830608347] [2021-08-21 11:04:12,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:04:12,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:12,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:12,790 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) [2021-08-21 11:04:12,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 11:04:14,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:04:14,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:14,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:14,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830608347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:15,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:15,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:15,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655813343] [2021-08-21 11:04:15,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:15,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:15,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:15,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:15,234 INFO L87 Difference]: Start difference. First operand 4631 states and 12750 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) [2021-08-21 11:04:15,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:15,774 INFO L93 Difference]: Finished difference Result 6752 states and 17504 transitions. [2021-08-21 11:04:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:04:15,775 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 [2021-08-21 11:04:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:15,785 INFO L225 Difference]: With dead ends: 6752 [2021-08-21 11:04:15,785 INFO L226 Difference]: Without dead ends: 6360 [2021-08-21 11:04:15,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=377, Invalid=1183, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:04:15,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-08-21 11:04:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 4671. [2021-08-21 11:04:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.747323340471092) internal successors, (12830), 4670 states have internal predecessors, (12830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 12830 transitions. [2021-08-21 11:04:15,847 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 12830 transitions. Word has length 62 [2021-08-21 11:04:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 4671 states and 12830 transitions. [2021-08-21 11:04:15,847 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) [2021-08-21 11:04:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 12830 transitions. [2021-08-21 11:04:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:15,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:15,852 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] [2021-08-21 11:04:15,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:16,072 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,SelfDestructingSolverStorable55 [2021-08-21 11:04:16,073 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1538326815, now seen corresponding path program 27 times [2021-08-21 11:04:16,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:16,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619317869] [2021-08-21 11:04:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:16,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:16,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:16,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619317869] [2021-08-21 11:04:16,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619317869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:16,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666127334] [2021-08-21 11:04:16,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:16,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:16,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:16,251 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) [2021-08-21 11:04:16,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 11:04:18,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:04:18,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:18,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:18,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666127334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:18,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:18,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:18,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981899768] [2021-08-21 11:04:18,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:18,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:18,961 INFO L87 Difference]: Start difference. First operand 4671 states and 12830 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) [2021-08-21 11:04:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:19,355 INFO L93 Difference]: Finished difference Result 6458 states and 16790 transitions. [2021-08-21 11:04:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:04:19,355 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 [2021-08-21 11:04:19,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:19,364 INFO L225 Difference]: With dead ends: 6458 [2021-08-21 11:04:19,365 INFO L226 Difference]: Without dead ends: 6306 [2021-08-21 11:04:19,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:04:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6306 states. [2021-08-21 11:04:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6306 to 4646. [2021-08-21 11:04:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 2.7502691065662) internal successors, (12775), 4645 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 12775 transitions. [2021-08-21 11:04:19,428 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 12775 transitions. Word has length 62 [2021-08-21 11:04:19,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:19,428 INFO L470 AbstractCegarLoop]: Abstraction has 4646 states and 12775 transitions. [2021-08-21 11:04:19,428 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) [2021-08-21 11:04:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 12775 transitions. [2021-08-21 11:04:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:19,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:19,433 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] [2021-08-21 11:04:19,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:19,637 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,SelfDestructingSolverStorable56 [2021-08-21 11:04:19,637 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:19,638 INFO L82 PathProgramCache]: Analyzing trace with hash -222408201, now seen corresponding path program 28 times [2021-08-21 11:04:19,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:19,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199375942] [2021-08-21 11:04:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:19,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:19,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:19,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199375942] [2021-08-21 11:04:19,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199375942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:19,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547991647] [2021-08-21 11:04:19,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:04:19,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:19,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:19,789 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) [2021-08-21 11:04:19,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 11:04:21,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:04:21,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:22,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547991647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:22,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:22,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:22,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393948133] [2021-08-21 11:04:22,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:22,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:22,226 INFO L87 Difference]: Start difference. First operand 4646 states and 12775 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) [2021-08-21 11:04:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:22,657 INFO L93 Difference]: Finished difference Result 6415 states and 16697 transitions. [2021-08-21 11:04:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:04:22,658 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 [2021-08-21 11:04:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:22,665 INFO L225 Difference]: With dead ends: 6415 [2021-08-21 11:04:22,665 INFO L226 Difference]: Without dead ends: 6263 [2021-08-21 11:04:22,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:04:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6263 states. [2021-08-21 11:04:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6263 to 4776. [2021-08-21 11:04:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4776 states, 4775 states have (on average 2.735287958115183) internal successors, (13061), 4775 states have internal predecessors, (13061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4776 states to 4776 states and 13061 transitions. [2021-08-21 11:04:22,736 INFO L78 Accepts]: Start accepts. Automaton has 4776 states and 13061 transitions. Word has length 62 [2021-08-21 11:04:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 4776 states and 13061 transitions. [2021-08-21 11:04:22,736 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) [2021-08-21 11:04:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4776 states and 13061 transitions. [2021-08-21 11:04:22,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:22,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:22,742 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] [2021-08-21 11:04:22,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 11:04:22,943 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,SelfDestructingSolverStorable57 [2021-08-21 11:04:22,943 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash -598108695, now seen corresponding path program 29 times [2021-08-21 11:04:22,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:22,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206427007] [2021-08-21 11:04:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:22,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:23,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:23,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206427007] [2021-08-21 11:04:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206427007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:23,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690595551] [2021-08-21 11:04:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:04:23,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:23,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:23,103 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) [2021-08-21 11:04:23,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 11:04:25,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:04:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:25,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690595551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:25,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:25,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:25,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981926173] [2021-08-21 11:04:25,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:25,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:25,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:25,637 INFO L87 Difference]: Start difference. First operand 4776 states and 13061 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) [2021-08-21 11:04:26,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:26,065 INFO L93 Difference]: Finished difference Result 6688 states and 17240 transitions. [2021-08-21 11:04:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:04:26,065 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 [2021-08-21 11:04:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:26,074 INFO L225 Difference]: With dead ends: 6688 [2021-08-21 11:04:26,074 INFO L226 Difference]: Without dead ends: 6536 [2021-08-21 11:04:26,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:04:26,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6536 states. [2021-08-21 11:04:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6536 to 4801. [2021-08-21 11:04:26,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 2.7325) internal successors, (13116), 4800 states have internal predecessors, (13116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 13116 transitions. [2021-08-21 11:04:26,128 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 13116 transitions. Word has length 62 [2021-08-21 11:04:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:26,129 INFO L470 AbstractCegarLoop]: Abstraction has 4801 states and 13116 transitions. [2021-08-21 11:04:26,129 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) [2021-08-21 11:04:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 13116 transitions. [2021-08-21 11:04:26,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:26,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:26,133 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] [2021-08-21 11:04:26,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 11:04:26,353 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,SelfDestructingSolverStorable58 [2021-08-21 11:04:26,353 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:26,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash -187277073, now seen corresponding path program 21 times [2021-08-21 11:04:26,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:26,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442663233] [2021-08-21 11:04:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:26,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:26,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:26,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442663233] [2021-08-21 11:04:26,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442663233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:26,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801475903] [2021-08-21 11:04:26,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:26,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:26,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:26,473 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) [2021-08-21 11:04:26,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 11:04:28,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:04:28,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:28,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:29,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801475903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:29,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:29,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:29,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626996190] [2021-08-21 11:04:29,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:29,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:29,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:29,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:29,094 INFO L87 Difference]: Start difference. First operand 4801 states and 13116 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) [2021-08-21 11:04:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:29,544 INFO L93 Difference]: Finished difference Result 6623 states and 17241 transitions. [2021-08-21 11:04:29,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:04:29,544 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 [2021-08-21 11:04:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:29,553 INFO L225 Difference]: With dead ends: 6623 [2021-08-21 11:04:29,553 INFO L226 Difference]: Without dead ends: 6231 [2021-08-21 11:04:29,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:04:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-08-21 11:04:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 4825. [2021-08-21 11:04:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4825 states, 4824 states have (on average 2.727197346600332) internal successors, (13156), 4824 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4825 states to 4825 states and 13156 transitions. [2021-08-21 11:04:29,619 INFO L78 Accepts]: Start accepts. Automaton has 4825 states and 13156 transitions. Word has length 62 [2021-08-21 11:04:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:29,619 INFO L470 AbstractCegarLoop]: Abstraction has 4825 states and 13156 transitions. [2021-08-21 11:04:29,619 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) [2021-08-21 11:04:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4825 states and 13156 transitions. [2021-08-21 11:04:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:29,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:29,623 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] [2021-08-21 11:04:29,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:29,844 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,SelfDestructingSolverStorable59 [2021-08-21 11:04:29,844 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:29,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1408613833, now seen corresponding path program 30 times [2021-08-21 11:04:29,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:29,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780857801] [2021-08-21 11:04:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:29,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:30,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:30,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780857801] [2021-08-21 11:04:30,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780857801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:30,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816024259] [2021-08-21 11:04:30,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:04:30,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:30,002 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) [2021-08-21 11:04:30,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 11:04:31,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:04:31,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:31,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816024259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:32,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:32,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:32,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923439605] [2021-08-21 11:04:32,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:32,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:32,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:32,429 INFO L87 Difference]: Start difference. First operand 4825 states and 13156 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) [2021-08-21 11:04:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:32,838 INFO L93 Difference]: Finished difference Result 6324 states and 16500 transitions. [2021-08-21 11:04:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:04:32,838 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 [2021-08-21 11:04:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:32,847 INFO L225 Difference]: With dead ends: 6324 [2021-08-21 11:04:32,848 INFO L226 Difference]: Without dead ends: 6172 [2021-08-21 11:04:32,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 429.5ms TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:04:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2021-08-21 11:04:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 4760. [2021-08-21 11:04:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4760 states, 4759 states have (on average 2.7343979827694893) internal successors, (13013), 4759 states have internal predecessors, (13013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4760 states to 4760 states and 13013 transitions. [2021-08-21 11:04:32,910 INFO L78 Accepts]: Start accepts. Automaton has 4760 states and 13013 transitions. Word has length 62 [2021-08-21 11:04:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:32,910 INFO L470 AbstractCegarLoop]: Abstraction has 4760 states and 13013 transitions. [2021-08-21 11:04:32,910 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) [2021-08-21 11:04:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4760 states and 13013 transitions. [2021-08-21 11:04:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:32,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:32,915 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] [2021-08-21 11:04:32,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:33,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:33,133 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1572644747, now seen corresponding path program 31 times [2021-08-21 11:04:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:33,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764065238] [2021-08-21 11:04:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:33,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:33,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:33,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764065238] [2021-08-21 11:04:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764065238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:33,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967183854] [2021-08-21 11:04:33,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:04:33,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:33,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:33,241 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) [2021-08-21 11:04:33,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 11:04:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:35,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967183854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:35,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:35,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:35,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642870243] [2021-08-21 11:04:35,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:35,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:35,916 INFO L87 Difference]: Start difference. First operand 4760 states and 13013 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) [2021-08-21 11:04:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:36,164 INFO L93 Difference]: Finished difference Result 6607 states and 17089 transitions. [2021-08-21 11:04:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:04:36,164 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 [2021-08-21 11:04:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:36,173 INFO L225 Difference]: With dead ends: 6607 [2021-08-21 11:04:36,174 INFO L226 Difference]: Without dead ends: 6455 [2021-08-21 11:04:36,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-08-21 11:04:36,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6455 states. [2021-08-21 11:04:36,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6455 to 4810. [2021-08-21 11:04:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 2.7288417550426285) internal successors, (13123), 4809 states have internal predecessors, (13123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 13123 transitions. [2021-08-21 11:04:36,237 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 13123 transitions. Word has length 62 [2021-08-21 11:04:36,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:36,237 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 13123 transitions. [2021-08-21 11:04:36,237 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) [2021-08-21 11:04:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 13123 transitions. [2021-08-21 11:04:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:36,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:36,242 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] [2021-08-21 11:04:36,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:36,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:36,464 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:36,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:36,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1789920991, now seen corresponding path program 32 times [2021-08-21 11:04:36,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:36,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792283515] [2021-08-21 11:04:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:36,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:36,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:36,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792283515] [2021-08-21 11:04:36,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792283515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:36,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604474338] [2021-08-21 11:04:36,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:04:36,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:36,569 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) [2021-08-21 11:04:36,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 11:04:38,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:04:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:39,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604474338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:39,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:39,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:39,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068689669] [2021-08-21 11:04:39,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:39,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:39,319 INFO L87 Difference]: Start difference. First operand 4810 states and 13123 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) [2021-08-21 11:04:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:39,653 INFO L93 Difference]: Finished difference Result 6937 states and 17751 transitions. [2021-08-21 11:04:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:04:39,654 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 [2021-08-21 11:04:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:39,665 INFO L225 Difference]: With dead ends: 6937 [2021-08-21 11:04:39,665 INFO L226 Difference]: Without dead ends: 6785 [2021-08-21 11:04:39,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:04:39,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6785 states. [2021-08-21 11:04:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6785 to 4810. [2021-08-21 11:04:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4809 states have (on average 2.7288417550426285) internal successors, (13123), 4809 states have internal predecessors, (13123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 13123 transitions. [2021-08-21 11:04:39,736 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 13123 transitions. Word has length 62 [2021-08-21 11:04:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:39,737 INFO L470 AbstractCegarLoop]: Abstraction has 4810 states and 13123 transitions. [2021-08-21 11:04:39,737 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) [2021-08-21 11:04:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 13123 transitions. [2021-08-21 11:04:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:39,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:39,742 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] [2021-08-21 11:04:39,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:39,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:39,951 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash -264374867, now seen corresponding path program 33 times [2021-08-21 11:04:39,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:39,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672060351] [2021-08-21 11:04:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:39,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:40,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:40,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672060351] [2021-08-21 11:04:40,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672060351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:40,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977575660] [2021-08-21 11:04:40,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:04:40,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:40,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:40,052 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) [2021-08-21 11:04:40,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 11:04:42,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 11:04:42,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:42,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:42,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977575660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:42,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:42,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:42,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521657464] [2021-08-21 11:04:42,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:42,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:42,454 INFO L87 Difference]: Start difference. First operand 4810 states and 13123 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) [2021-08-21 11:04:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:42,909 INFO L93 Difference]: Finished difference Result 6998 states and 17858 transitions. [2021-08-21 11:04:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:04:42,910 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 [2021-08-21 11:04:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:42,919 INFO L225 Difference]: With dead ends: 6998 [2021-08-21 11:04:42,919 INFO L226 Difference]: Without dead ends: 6846 [2021-08-21 11:04:42,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=413, Invalid=1227, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:04:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-08-21 11:04:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 4885. [2021-08-21 11:04:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4885 states, 4884 states have (on average 2.720720720720721) internal successors, (13288), 4884 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:42,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4885 states to 4885 states and 13288 transitions. [2021-08-21 11:04:42,979 INFO L78 Accepts]: Start accepts. Automaton has 4885 states and 13288 transitions. Word has length 62 [2021-08-21 11:04:42,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:42,980 INFO L470 AbstractCegarLoop]: Abstraction has 4885 states and 13288 transitions. [2021-08-21 11:04:42,980 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) [2021-08-21 11:04:42,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4885 states and 13288 transitions. [2021-08-21 11:04:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:42,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:42,984 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] [2021-08-21 11:04:43,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:43,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:43,206 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash -640075361, now seen corresponding path program 34 times [2021-08-21 11:04:43,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:43,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057974192] [2021-08-21 11:04:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:43,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:43,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:43,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057974192] [2021-08-21 11:04:43,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057974192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:43,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733893290] [2021-08-21 11:04:43,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:04:43,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:43,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:43,341 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) [2021-08-21 11:04:43,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 11:04:45,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:04:45,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733893290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:46,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:46,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:46,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294427591] [2021-08-21 11:04:46,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:46,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:46,139 INFO L87 Difference]: Start difference. First operand 4885 states and 13288 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) [2021-08-21 11:04:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:46,698 INFO L93 Difference]: Finished difference Result 7333 states and 18651 transitions. [2021-08-21 11:04:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:04:46,698 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 [2021-08-21 11:04:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:46,708 INFO L225 Difference]: With dead ends: 7333 [2021-08-21 11:04:46,708 INFO L226 Difference]: Without dead ends: 6941 [2021-08-21 11:04:46,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 523.5ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:04:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6941 states. [2021-08-21 11:04:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6941 to 4910. [2021-08-21 11:04:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 2.7180688531269097) internal successors, (13343), 4909 states have internal predecessors, (13343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 13343 transitions. [2021-08-21 11:04:46,775 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 13343 transitions. Word has length 62 [2021-08-21 11:04:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:46,775 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 13343 transitions. [2021-08-21 11:04:46,775 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) [2021-08-21 11:04:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 13343 transitions. [2021-08-21 11:04:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:46,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:46,780 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] [2021-08-21 11:04:46,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:47,000 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,SelfDestructingSolverStorable64 [2021-08-21 11:04:47,001 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:47,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:47,001 INFO L82 PathProgramCache]: Analyzing trace with hash 119840139, now seen corresponding path program 35 times [2021-08-21 11:04:47,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:47,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865627938] [2021-08-21 11:04:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:47,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:47,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:47,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865627938] [2021-08-21 11:04:47,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865627938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:47,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783471888] [2021-08-21 11:04:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:04:47,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:47,102 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) [2021-08-21 11:04:47,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 11:04:49,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:04:49,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:49,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783471888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:49,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:49,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:49,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247442866] [2021-08-21 11:04:49,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:49,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:49,907 INFO L87 Difference]: Start difference. First operand 4910 states and 13343 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) [2021-08-21 11:04:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:50,397 INFO L93 Difference]: Finished difference Result 6988 states and 17828 transitions. [2021-08-21 11:04:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:04:50,398 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 [2021-08-21 11:04:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:50,408 INFO L225 Difference]: With dead ends: 6988 [2021-08-21 11:04:50,409 INFO L226 Difference]: Without dead ends: 6836 [2021-08-21 11:04:50,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:04:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2021-08-21 11:04:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 4860. [2021-08-21 11:04:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.723399876517802) internal successors, (13233), 4859 states have internal predecessors, (13233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 13233 transitions. [2021-08-21 11:04:50,479 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 13233 transitions. Word has length 62 [2021-08-21 11:04:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:50,479 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 13233 transitions. [2021-08-21 11:04:50,479 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) [2021-08-21 11:04:50,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 13233 transitions. [2021-08-21 11:04:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:50,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:50,484 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] [2021-08-21 11:04:50,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:50,700 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,SelfDestructingSolverStorable65 [2021-08-21 11:04:50,701 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1262280279, now seen corresponding path program 36 times [2021-08-21 11:04:50,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:50,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318337232] [2021-08-21 11:04:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:50,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:50,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:50,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318337232] [2021-08-21 11:04:50,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318337232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:50,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464197491] [2021-08-21 11:04:50,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:04:50,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:50,805 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) [2021-08-21 11:04:50,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 11:04:53,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:04:53,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:04:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:53,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464197491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:53,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:53,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:53,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931659177] [2021-08-21 11:04:53,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:53,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:53,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:53,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:53,725 INFO L87 Difference]: Start difference. First operand 4860 states and 13233 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) [2021-08-21 11:04:54,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:54,012 INFO L93 Difference]: Finished difference Result 6822 states and 17514 transitions. [2021-08-21 11:04:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:04:54,012 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 [2021-08-21 11:04:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:54,021 INFO L225 Difference]: With dead ends: 6822 [2021-08-21 11:04:54,021 INFO L226 Difference]: Without dead ends: 6670 [2021-08-21 11:04:54,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 11:04:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-08-21 11:04:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4885. [2021-08-21 11:04:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4885 states, 4884 states have (on average 2.720720720720721) internal successors, (13288), 4884 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4885 states to 4885 states and 13288 transitions. [2021-08-21 11:04:54,080 INFO L78 Accepts]: Start accepts. Automaton has 4885 states and 13288 transitions. Word has length 62 [2021-08-21 11:04:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:54,080 INFO L470 AbstractCegarLoop]: Abstraction has 4885 states and 13288 transitions. [2021-08-21 11:04:54,080 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) [2021-08-21 11:04:54,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4885 states and 13288 transitions. [2021-08-21 11:04:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:54,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:54,084 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] [2021-08-21 11:04:54,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:54,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:54,307 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:54,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:54,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2100285459, now seen corresponding path program 37 times [2021-08-21 11:04:54,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:54,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035970589] [2021-08-21 11:04:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:54,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:54,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:54,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035970589] [2021-08-21 11:04:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035970589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:54,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34436877] [2021-08-21 11:04:54,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:04:54,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:54,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:54,407 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) [2021-08-21 11:04:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 11:04:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:04:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:04:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:57,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34436877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:57,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:04:57,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:04:57,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618114630] [2021-08-21 11:04:57,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:04:57,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:04:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:04:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:04:57,418 INFO L87 Difference]: Start difference. First operand 4885 states and 13288 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) [2021-08-21 11:04:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:04:57,815 INFO L93 Difference]: Finished difference Result 7127 states and 18121 transitions. [2021-08-21 11:04:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:04:57,815 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 [2021-08-21 11:04:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:04:57,824 INFO L225 Difference]: With dead ends: 7127 [2021-08-21 11:04:57,824 INFO L226 Difference]: Without dead ends: 6975 [2021-08-21 11:04:57,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:04:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6975 states. [2021-08-21 11:04:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6975 to 4885. [2021-08-21 11:04:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4885 states, 4884 states have (on average 2.720720720720721) internal successors, (13288), 4884 states have internal predecessors, (13288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:04:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4885 states to 4885 states and 13288 transitions. [2021-08-21 11:04:57,883 INFO L78 Accepts]: Start accepts. Automaton has 4885 states and 13288 transitions. Word has length 62 [2021-08-21 11:04:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:04:57,883 INFO L470 AbstractCegarLoop]: Abstraction has 4885 states and 13288 transitions. [2021-08-21 11:04:57,884 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) [2021-08-21 11:04:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 4885 states and 13288 transitions. [2021-08-21 11:04:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:04:57,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:04:57,888 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] [2021-08-21 11:04:57,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 11:04:58,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:58,102 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:04:58,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:04:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1789880309, now seen corresponding path program 38 times [2021-08-21 11:04:58,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:04:58,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473925116] [2021-08-21 11:04:58,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:04:58,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:04:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:04:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:04:58,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:04:58,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473925116] [2021-08-21 11:04:58,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473925116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:04:58,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342268412] [2021-08-21 11:04:58,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:04:58,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:04:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:04:58,201 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) [2021-08-21 11:04:58,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 11:05:00,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:05:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:00,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:00,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:01,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342268412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:01,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:01,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:01,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434357720] [2021-08-21 11:05:01,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:01,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:01,189 INFO L87 Difference]: Start difference. First operand 4885 states and 13288 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) [2021-08-21 11:05:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:01,487 INFO L93 Difference]: Finished difference Result 6852 states and 17594 transitions. [2021-08-21 11:05:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:05:01,488 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 [2021-08-21 11:05:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:01,497 INFO L225 Difference]: With dead ends: 6852 [2021-08-21 11:05:01,498 INFO L226 Difference]: Without dead ends: 6700 [2021-08-21 11:05:01,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=296, Invalid=826, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 11:05:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6700 states. [2021-08-21 11:05:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6700 to 4860. [2021-08-21 11:05:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 4859 states have (on average 2.723399876517802) internal successors, (13233), 4859 states have internal predecessors, (13233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 13233 transitions. [2021-08-21 11:05:01,560 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 13233 transitions. Word has length 62 [2021-08-21 11:05:01,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:01,561 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 13233 transitions. [2021-08-21 11:05:01,561 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) [2021-08-21 11:05:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 13233 transitions. [2021-08-21 11:05:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:01,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:01,565 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] [2021-08-21 11:05:01,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:01,788 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,SelfDestructingSolverStorable68 [2021-08-21 11:05:01,789 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:01,789 INFO L82 PathProgramCache]: Analyzing trace with hash 640887987, now seen corresponding path program 39 times [2021-08-21 11:05:01,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:01,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51391447] [2021-08-21 11:05:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:01,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:01,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:01,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51391447] [2021-08-21 11:05:01,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51391447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:01,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366166352] [2021-08-21 11:05:01,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:05:01,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:01,889 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) [2021-08-21 11:05:01,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 11:05:04,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:05:04,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:04,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:04,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:04,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366166352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:04,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:04,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:04,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062303811] [2021-08-21 11:05:04,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:04,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:04,959 INFO L87 Difference]: Start difference. First operand 4860 states and 13233 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) [2021-08-21 11:05:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:05:05,298 INFO L93 Difference]: Finished difference Result 7191 states and 18507 transitions. [2021-08-21 11:05:05,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 11:05:05,299 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 [2021-08-21 11:05:05,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:05:05,308 INFO L225 Difference]: With dead ends: 7191 [2021-08-21 11:05:05,309 INFO L226 Difference]: Without dead ends: 7039 [2021-08-21 11:05:05,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=307, Invalid=953, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 11:05:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7039 states. [2021-08-21 11:05:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7039 to 4935. [2021-08-21 11:05:05,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4935 states, 4934 states have (on average 2.7336846372111876) internal successors, (13488), 4934 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:05:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4935 states to 4935 states and 13488 transitions. [2021-08-21 11:05:05,373 INFO L78 Accepts]: Start accepts. Automaton has 4935 states and 13488 transitions. Word has length 62 [2021-08-21 11:05:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:05:05,373 INFO L470 AbstractCegarLoop]: Abstraction has 4935 states and 13488 transitions. [2021-08-21 11:05:05,373 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) [2021-08-21 11:05:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 4935 states and 13488 transitions. [2021-08-21 11:05:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:05:05,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:05:05,377 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] [2021-08-21 11:05:05,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 11:05:05,592 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,SelfDestructingSolverStorable69 [2021-08-21 11:05:05,592 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:05:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:05:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash -758566401, now seen corresponding path program 40 times [2021-08-21 11:05:05,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:05:05,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913476925] [2021-08-21 11:05:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:05:05,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:05:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:05:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:05,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:05:05,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913476925] [2021-08-21 11:05:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913476925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:05,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374517225] [2021-08-21 11:05:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:05:05,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:05:05,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:05:05,690 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) [2021-08-21 11:05:05,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 11:05:08,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:05:08,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:05:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:05:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:05:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:05:08,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374517225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:05:08,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:05:08,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:05:08,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29575190] [2021-08-21 11:05:08,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:05:08,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:05:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:05:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:05:08,750 INFO L87 Difference]: Start difference. First operand 4935 states and 13488 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) [2021-08-21 11:06:43,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:43,957 INFO L93 Difference]: Finished difference Result 10406 states and 27140 transitions. [2021-08-21 11:06:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 11:06:43,957 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 [2021-08-21 11:06:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:43,970 INFO L225 Difference]: With dead ends: 10406 [2021-08-21 11:06:43,971 INFO L226 Difference]: Without dead ends: 9848 [2021-08-21 11:06:43,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 34071.3ms TimeCoverageRelationStatistics Valid=601, Invalid=2043, Unknown=8, NotChecked=0, Total=2652 [2021-08-21 11:06:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2021-08-21 11:06:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 4835. [2021-08-21 11:06:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 4834 states have (on average 2.7261067438973936) internal successors, (13178), 4834 states have internal predecessors, (13178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 13178 transitions. [2021-08-21 11:06:44,045 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 13178 transitions. Word has length 62 [2021-08-21 11:06:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:44,045 INFO L470 AbstractCegarLoop]: Abstraction has 4835 states and 13178 transitions. [2021-08-21 11:06:44,045 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) [2021-08-21 11:06:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 13178 transitions. [2021-08-21 11:06:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:44,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:44,049 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] [2021-08-21 11:06:44,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:44,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:44,265 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1452408097, now seen corresponding path program 41 times [2021-08-21 11:06:44,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:44,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539506338] [2021-08-21 11:06:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:44,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:44,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:44,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539506338] [2021-08-21 11:06:44,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539506338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:44,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378322925] [2021-08-21 11:06:44,368 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:06:44,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:44,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:44,369 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) [2021-08-21 11:06:44,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 11:06:46,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:06:46,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:47,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:47,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378322925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:47,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:47,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:47,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587165584] [2021-08-21 11:06:47,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:47,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:47,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:47,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:47,424 INFO L87 Difference]: Start difference. First operand 4835 states and 13178 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) [2021-08-21 11:06:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:48,021 INFO L93 Difference]: Finished difference Result 8517 states and 21660 transitions. [2021-08-21 11:06:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:06:48,022 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 [2021-08-21 11:06:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:48,033 INFO L225 Difference]: With dead ends: 8517 [2021-08-21 11:06:48,033 INFO L226 Difference]: Without dead ends: 8365 [2021-08-21 11:06:48,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:06:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8365 states. [2021-08-21 11:06:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8365 to 4910. [2021-08-21 11:06:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 2.736402525972703) internal successors, (13433), 4909 states have internal predecessors, (13433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 13433 transitions. [2021-08-21 11:06:48,103 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 13433 transitions. Word has length 62 [2021-08-21 11:06:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:48,103 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 13433 transitions. [2021-08-21 11:06:48,103 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) [2021-08-21 11:06:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 13433 transitions. [2021-08-21 11:06:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:48,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:48,107 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] [2021-08-21 11:06:48,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:48,320 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,SelfDestructingSolverStorable71 [2021-08-21 11:06:48,321 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:48,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:48,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1716505381, now seen corresponding path program 42 times [2021-08-21 11:06:48,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:48,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573596494] [2021-08-21 11:06:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:48,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:48,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:48,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573596494] [2021-08-21 11:06:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573596494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:48,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377355118] [2021-08-21 11:06:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:06:48,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:48,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:48,453 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) [2021-08-21 11:06:48,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 11:06:51,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:06:51,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:06:51,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:51,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377355118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:51,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:51,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:51,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335600976] [2021-08-21 11:06:51,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:51,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:51,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:51,607 INFO L87 Difference]: Start difference. First operand 4910 states and 13433 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) [2021-08-21 11:06:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:52,181 INFO L93 Difference]: Finished difference Result 8913 states and 23305 transitions. [2021-08-21 11:06:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:06:52,181 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 [2021-08-21 11:06:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:52,193 INFO L225 Difference]: With dead ends: 8913 [2021-08-21 11:06:52,194 INFO L226 Difference]: Without dead ends: 8761 [2021-08-21 11:06:52,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:06:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8761 states. [2021-08-21 11:06:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8761 to 5150. [2021-08-21 11:06:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5150 states, 5149 states have (on average 2.7498543406486697) internal successors, (14159), 5149 states have internal predecessors, (14159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5150 states to 5150 states and 14159 transitions. [2021-08-21 11:06:52,276 INFO L78 Accepts]: Start accepts. Automaton has 5150 states and 14159 transitions. Word has length 62 [2021-08-21 11:06:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:52,276 INFO L470 AbstractCegarLoop]: Abstraction has 5150 states and 14159 transitions. [2021-08-21 11:06:52,277 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) [2021-08-21 11:06:52,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5150 states and 14159 transitions. [2021-08-21 11:06:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:52,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:52,281 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] [2021-08-21 11:06:52,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:52,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:52,501 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1918889175, now seen corresponding path program 43 times [2021-08-21 11:06:52,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:52,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30405345] [2021-08-21 11:06:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:52,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:52,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30405345] [2021-08-21 11:06:52,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30405345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:52,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61317908] [2021-08-21 11:06:52,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:06:52,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:52,599 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) [2021-08-21 11:06:52,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 11:06:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:06:55,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:06:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:55,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61317908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:55,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:06:55,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:06:55,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067564471] [2021-08-21 11:06:55,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:06:55,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:06:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:06:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:06:55,903 INFO L87 Difference]: Start difference. First operand 5150 states and 14159 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) [2021-08-21 11:06:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:06:56,889 INFO L93 Difference]: Finished difference Result 11273 states and 29578 transitions. [2021-08-21 11:06:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 11:06:56,889 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 [2021-08-21 11:06:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:06:56,904 INFO L225 Difference]: With dead ends: 11273 [2021-08-21 11:06:56,904 INFO L226 Difference]: Without dead ends: 10715 [2021-08-21 11:06:56,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 11:06:56,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10715 states. [2021-08-21 11:06:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10715 to 4640. [2021-08-21 11:06:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4639 states have (on average 2.699719767191205) internal successors, (12524), 4639 states have internal predecessors, (12524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:06:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 12524 transitions. [2021-08-21 11:06:56,994 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 12524 transitions. Word has length 62 [2021-08-21 11:06:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:06:56,994 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 12524 transitions. [2021-08-21 11:06:56,994 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) [2021-08-21 11:06:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 12524 transitions. [2021-08-21 11:06:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:06:56,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:06:56,998 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] [2021-08-21 11:06:57,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 11:06:57,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:57,204 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:06:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:06:57,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1516775931, now seen corresponding path program 44 times [2021-08-21 11:06:57,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:06:57,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024424151] [2021-08-21 11:06:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:06:57,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:06:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:06:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:06:57,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:06:57,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024424151] [2021-08-21 11:06:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024424151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:06:57,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917712844] [2021-08-21 11:06:57,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:06:57,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:06:57,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:06:57,311 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) [2021-08-21 11:06:57,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 11:07:00,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:07:00,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:00,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:00,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:00,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917712844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:00,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:00,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:00,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134958149] [2021-08-21 11:07:00,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:00,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:00,594 INFO L87 Difference]: Start difference. First operand 4640 states and 12524 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) [2021-08-21 11:07:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:01,258 INFO L93 Difference]: Finished difference Result 8308 states and 20838 transitions. [2021-08-21 11:07:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 11:07:01,258 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 [2021-08-21 11:07:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:01,269 INFO L225 Difference]: With dead ends: 8308 [2021-08-21 11:07:01,269 INFO L226 Difference]: Without dead ends: 8156 [2021-08-21 11:07:01,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=479, Invalid=1591, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:07:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-08-21 11:07:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 4940. [2021-08-21 11:07:01,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4940 states, 4939 states have (on average 2.7240332051022476) internal successors, (13454), 4939 states have internal predecessors, (13454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4940 states to 4940 states and 13454 transitions. [2021-08-21 11:07:01,333 INFO L78 Accepts]: Start accepts. Automaton has 4940 states and 13454 transitions. Word has length 62 [2021-08-21 11:07:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:01,333 INFO L470 AbstractCegarLoop]: Abstraction has 4940 states and 13454 transitions. [2021-08-21 11:07:01,333 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) [2021-08-21 11:07:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4940 states and 13454 transitions. [2021-08-21 11:07:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:01,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:01,337 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] [2021-08-21 11:07:01,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:01,561 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,SelfDestructingSolverStorable74 [2021-08-21 11:07:01,562 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:01,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:01,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1141075437, now seen corresponding path program 45 times [2021-08-21 11:07:01,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:01,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693709010] [2021-08-21 11:07:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:01,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:01,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693709010] [2021-08-21 11:07:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693709010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315253073] [2021-08-21 11:07:01,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:07:01,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:01,678 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) [2021-08-21 11:07:01,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 11:07:04,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:07:04,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:04,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:05,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315253073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:05,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:05,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:05,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130979803] [2021-08-21 11:07:05,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:05,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:05,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:05,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:05,043 INFO L87 Difference]: Start difference. First operand 4940 states and 13454 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) [2021-08-21 11:07:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:05,728 INFO L93 Difference]: Finished difference Result 8796 states and 21942 transitions. [2021-08-21 11:07:05,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 11:07:05,729 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 [2021-08-21 11:07:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:05,741 INFO L225 Difference]: With dead ends: 8796 [2021-08-21 11:07:05,741 INFO L226 Difference]: Without dead ends: 8404 [2021-08-21 11:07:05,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=560, Invalid=1990, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 11:07:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2021-08-21 11:07:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 5080. [2021-08-21 11:07:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5080 states, 5079 states have (on average 2.735577869659382) internal successors, (13894), 5079 states have internal predecessors, (13894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5080 states to 5080 states and 13894 transitions. [2021-08-21 11:07:05,852 INFO L78 Accepts]: Start accepts. Automaton has 5080 states and 13894 transitions. Word has length 62 [2021-08-21 11:07:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:05,852 INFO L470 AbstractCegarLoop]: Abstraction has 5080 states and 13894 transitions. [2021-08-21 11:07:05,852 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) [2021-08-21 11:07:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5080 states and 13894 transitions. [2021-08-21 11:07:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:05,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:05,857 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] [2021-08-21 11:07:05,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:06,081 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:06,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:06,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1405118509, now seen corresponding path program 46 times [2021-08-21 11:07:06,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:06,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324996826] [2021-08-21 11:07:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:06,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:06,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:06,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324996826] [2021-08-21 11:07:06,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324996826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:06,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074290008] [2021-08-21 11:07:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:07:06,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:06,191 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) [2021-08-21 11:07:06,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 11:07:09,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:07:09,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:09,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074290008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:09,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:09,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:09,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063266556] [2021-08-21 11:07:09,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:09,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:09,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:09,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:09,550 INFO L87 Difference]: Start difference. First operand 5080 states and 13894 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) [2021-08-21 11:07:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:10,225 INFO L93 Difference]: Finished difference Result 8618 states and 22015 transitions. [2021-08-21 11:07:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:07:10,225 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 [2021-08-21 11:07:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:10,236 INFO L225 Difference]: With dead ends: 8618 [2021-08-21 11:07:10,236 INFO L226 Difference]: Without dead ends: 8466 [2021-08-21 11:07:10,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=565, Invalid=1787, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:07:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-08-21 11:07:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 5230. [2021-08-21 11:07:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5230 states, 5229 states have (on average 2.754637598011092) internal successors, (14404), 5229 states have internal predecessors, (14404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5230 states to 5230 states and 14404 transitions. [2021-08-21 11:07:10,311 INFO L78 Accepts]: Start accepts. Automaton has 5230 states and 14404 transitions. Word has length 62 [2021-08-21 11:07:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:10,311 INFO L470 AbstractCegarLoop]: Abstraction has 5230 states and 14404 transitions. [2021-08-21 11:07:10,311 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) [2021-08-21 11:07:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5230 states and 14404 transitions. [2021-08-21 11:07:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:10,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:10,316 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] [2021-08-21 11:07:10,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:10,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:10,540 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:10,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1763794969, now seen corresponding path program 47 times [2021-08-21 11:07:10,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:10,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112120154] [2021-08-21 11:07:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:10,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:10,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:10,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112120154] [2021-08-21 11:07:10,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112120154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:10,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304506105] [2021-08-21 11:07:10,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:07:10,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:10,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:10,650 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) [2021-08-21 11:07:10,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 11:07:13,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 11:07:13,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:13,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:14,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304506105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:14,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:14,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:14,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391291835] [2021-08-21 11:07:14,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:14,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:14,115 INFO L87 Difference]: Start difference. First operand 5230 states and 14404 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) [2021-08-21 11:07:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:14,793 INFO L93 Difference]: Finished difference Result 9221 states and 24114 transitions. [2021-08-21 11:07:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 11:07:14,793 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 [2021-08-21 11:07:14,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:14,805 INFO L225 Difference]: With dead ends: 9221 [2021-08-21 11:07:14,805 INFO L226 Difference]: Without dead ends: 9069 [2021-08-21 11:07:14,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=538, Invalid=1718, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:07:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9069 states. [2021-08-21 11:07:14,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9069 to 5350. [2021-08-21 11:07:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5350 states, 5349 states have (on average 2.762946345111236) internal successors, (14779), 5349 states have internal predecessors, (14779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5350 states to 5350 states and 14779 transitions. [2021-08-21 11:07:14,893 INFO L78 Accepts]: Start accepts. Automaton has 5350 states and 14779 transitions. Word has length 62 [2021-08-21 11:07:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:14,893 INFO L470 AbstractCegarLoop]: Abstraction has 5350 states and 14779 transitions. [2021-08-21 11:07:14,893 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) [2021-08-21 11:07:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 5350 states and 14779 transitions. [2021-08-21 11:07:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:14,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:14,898 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] [2021-08-21 11:07:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:15,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:15,122 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:15,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:15,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1871599587, now seen corresponding path program 48 times [2021-08-21 11:07:15,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:15,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88624852] [2021-08-21 11:07:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:15,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:15,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:15,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88624852] [2021-08-21 11:07:15,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88624852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:15,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194884817] [2021-08-21 11:07:15,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:07:15,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:15,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:15,234 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) [2021-08-21 11:07:15,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 11:07:18,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 11:07:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:18,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:18,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194884817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:18,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:18,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831979135] [2021-08-21 11:07:18,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:18,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:18,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:18,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:18,734 INFO L87 Difference]: Start difference. First operand 5350 states and 14779 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) [2021-08-21 11:07:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:19,894 INFO L93 Difference]: Finished difference Result 12096 states and 31776 transitions. [2021-08-21 11:07:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 11:07:19,895 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 [2021-08-21 11:07:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:19,911 INFO L225 Difference]: With dead ends: 12096 [2021-08-21 11:07:19,911 INFO L226 Difference]: Without dead ends: 11271 [2021-08-21 11:07:19,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 1006.3ms TimeCoverageRelationStatistics Valid=950, Invalid=3606, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 11:07:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11271 states. [2021-08-21 11:07:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11271 to 5197. [2021-08-21 11:07:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5197 states, 5196 states have (on average 2.736913010007698) internal successors, (14221), 5196 states have internal predecessors, (14221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5197 states to 5197 states and 14221 transitions. [2021-08-21 11:07:20,029 INFO L78 Accepts]: Start accepts. Automaton has 5197 states and 14221 transitions. Word has length 62 [2021-08-21 11:07:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:20,029 INFO L470 AbstractCegarLoop]: Abstraction has 5197 states and 14221 transitions. [2021-08-21 11:07:20,030 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) [2021-08-21 11:07:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 5197 states and 14221 transitions. [2021-08-21 11:07:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:20,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:20,035 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] [2021-08-21 11:07:20,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:20,264 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,SelfDestructingSolverStorable78 [2021-08-21 11:07:20,265 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:20,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1292985753, now seen corresponding path program 49 times [2021-08-21 11:07:20,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:20,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756380206] [2021-08-21 11:07:20,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:20,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:20,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:20,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756380206] [2021-08-21 11:07:20,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756380206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:20,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884065760] [2021-08-21 11:07:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:07:20,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:20,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:20,378 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) [2021-08-21 11:07:20,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 11:07:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:23,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884065760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:23,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:23,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:23,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875218242] [2021-08-21 11:07:23,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:23,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:23,918 INFO L87 Difference]: Start difference. First operand 5197 states and 14221 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) [2021-08-21 11:07:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:24,710 INFO L93 Difference]: Finished difference Result 9033 states and 23745 transitions. [2021-08-21 11:07:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:07:24,710 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 [2021-08-21 11:07:24,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:24,723 INFO L225 Difference]: With dead ends: 9033 [2021-08-21 11:07:24,723 INFO L226 Difference]: Without dead ends: 8881 [2021-08-21 11:07:24,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=637, Invalid=2015, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:07:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8881 states. [2021-08-21 11:07:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8881 to 5437. [2021-08-21 11:07:24,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 2.754047093451067) internal successors, (14971), 5436 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 14971 transitions. [2021-08-21 11:07:24,815 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 14971 transitions. Word has length 62 [2021-08-21 11:07:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:24,815 INFO L470 AbstractCegarLoop]: Abstraction has 5437 states and 14971 transitions. [2021-08-21 11:07:24,815 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) [2021-08-21 11:07:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 14971 transitions. [2021-08-21 11:07:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:24,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:24,820 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] [2021-08-21 11:07:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:25,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:25,045 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash -633413013, now seen corresponding path program 50 times [2021-08-21 11:07:25,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:25,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609753450] [2021-08-21 11:07:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:25,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:25,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:25,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:25,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609753450] [2021-08-21 11:07:25,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609753450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:25,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889645631] [2021-08-21 11:07:25,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:07:25,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:25,157 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) [2021-08-21 11:07:25,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 11:07:28,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:07:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:28,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889645631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:28,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:28,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:28,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397214136] [2021-08-21 11:07:28,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:28,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:28,716 INFO L87 Difference]: Start difference. First operand 5437 states and 14971 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) [2021-08-21 11:07:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:29,914 INFO L93 Difference]: Finished difference Result 11233 states and 29715 transitions. [2021-08-21 11:07:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:07:29,915 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 [2021-08-21 11:07:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:29,930 INFO L225 Difference]: With dead ends: 11233 [2021-08-21 11:07:29,931 INFO L226 Difference]: Without dead ends: 10675 [2021-08-21 11:07:29,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1068.9ms TimeCoverageRelationStatistics Valid=972, Invalid=3318, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 11:07:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-08-21 11:07:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 5024. [2021-08-21 11:07:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5024 states, 5023 states have (on average 2.731634481385626) internal successors, (13721), 5023 states have internal predecessors, (13721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 13721 transitions. [2021-08-21 11:07:30,026 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 13721 transitions. Word has length 62 [2021-08-21 11:07:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:30,026 INFO L470 AbstractCegarLoop]: Abstraction has 5024 states and 13721 transitions. [2021-08-21 11:07:30,026 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) [2021-08-21 11:07:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 13721 transitions. [2021-08-21 11:07:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:30,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:30,031 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] [2021-08-21 11:07:30,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:30,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:30,255 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1391689779, now seen corresponding path program 51 times [2021-08-21 11:07:30,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:30,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621479189] [2021-08-21 11:07:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:30,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:30,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:30,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621479189] [2021-08-21 11:07:30,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621479189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:30,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7804400] [2021-08-21 11:07:30,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:07:30,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:30,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:30,366 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) [2021-08-21 11:07:30,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 11:07:33,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:07:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:33,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7804400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:33,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:33,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:33,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168500264] [2021-08-21 11:07:33,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:33,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:33,942 INFO L87 Difference]: Start difference. First operand 5024 states and 13721 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) [2021-08-21 11:07:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:34,424 INFO L93 Difference]: Finished difference Result 7423 states and 18933 transitions. [2021-08-21 11:07:34,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:07:34,424 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 [2021-08-21 11:07:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:34,434 INFO L225 Difference]: With dead ends: 7423 [2021-08-21 11:07:34,434 INFO L226 Difference]: Without dead ends: 7271 [2021-08-21 11:07:34,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:07:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7271 states. [2021-08-21 11:07:34,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7271 to 4999. [2021-08-21 11:07:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 4998 states have (on average 2.734293717486995) internal successors, (13666), 4998 states have internal predecessors, (13666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 13666 transitions. [2021-08-21 11:07:34,501 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 13666 transitions. Word has length 62 [2021-08-21 11:07:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:34,502 INFO L470 AbstractCegarLoop]: Abstraction has 4999 states and 13666 transitions. [2021-08-21 11:07:34,502 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) [2021-08-21 11:07:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 13666 transitions. [2021-08-21 11:07:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:34,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:34,506 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 11:07:34,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:34,720 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,SelfDestructingSolverStorable81 [2021-08-21 11:07:34,721 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:34,721 INFO L82 PathProgramCache]: Analyzing trace with hash 896489133, now seen corresponding path program 52 times [2021-08-21 11:07:34,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:34,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122928864] [2021-08-21 11:07:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:34,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:34,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:34,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122928864] [2021-08-21 11:07:34,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122928864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:34,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369572486] [2021-08-21 11:07:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:07:34,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:34,834 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) [2021-08-21 11:07:34,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 11:07:37,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:07:37,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:37,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:37,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:38,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369572486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:38,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:38,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:38,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852557684] [2021-08-21 11:07:38,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:38,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:38,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:38,387 INFO L87 Difference]: Start difference. First operand 4999 states and 13666 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) [2021-08-21 11:07:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:39,087 INFO L93 Difference]: Finished difference Result 8308 states and 21356 transitions. [2021-08-21 11:07:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:07:39,087 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 [2021-08-21 11:07:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:39,098 INFO L225 Difference]: With dead ends: 8308 [2021-08-21 11:07:39,098 INFO L226 Difference]: Without dead ends: 8156 [2021-08-21 11:07:39,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=456, Invalid=1524, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 11:07:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-08-21 11:07:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 5024. [2021-08-21 11:07:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5024 states, 5023 states have (on average 2.7495520605216006) internal successors, (13811), 5023 states have internal predecessors, (13811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5024 states to 5024 states and 13811 transitions. [2021-08-21 11:07:39,171 INFO L78 Accepts]: Start accepts. Automaton has 5024 states and 13811 transitions. Word has length 62 [2021-08-21 11:07:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:39,171 INFO L470 AbstractCegarLoop]: Abstraction has 5024 states and 13811 transitions. [2021-08-21 11:07:39,171 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) [2021-08-21 11:07:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5024 states and 13811 transitions. [2021-08-21 11:07:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:39,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:39,175 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] [2021-08-21 11:07:39,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:39,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:39,389 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:39,389 INFO L82 PathProgramCache]: Analyzing trace with hash -229564685, now seen corresponding path program 53 times [2021-08-21 11:07:39,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:39,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15622784] [2021-08-21 11:07:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:39,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:39,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:39,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15622784] [2021-08-21 11:07:39,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15622784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:39,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738165963] [2021-08-21 11:07:39,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:07:39,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:39,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:39,502 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) [2021-08-21 11:07:39,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 11:07:42,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:07:42,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:42,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:42,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:43,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738165963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:43,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:43,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:43,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285561279] [2021-08-21 11:07:43,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:43,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:43,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:43,124 INFO L87 Difference]: Start difference. First operand 5024 states and 13811 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) [2021-08-21 11:07:43,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:43,862 INFO L93 Difference]: Finished difference Result 8971 states and 23702 transitions. [2021-08-21 11:07:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 11:07:43,863 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 [2021-08-21 11:07:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:43,874 INFO L225 Difference]: With dead ends: 8971 [2021-08-21 11:07:43,875 INFO L226 Difference]: Without dead ends: 8819 [2021-08-21 11:07:43,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 667.7ms TimeCoverageRelationStatistics Valid=548, Invalid=1804, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:07:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-08-21 11:07:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 5234. [2021-08-21 11:07:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 2.756736097840627) internal successors, (14426), 5233 states have internal predecessors, (14426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 14426 transitions. [2021-08-21 11:07:43,948 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 14426 transitions. Word has length 62 [2021-08-21 11:07:43,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:43,948 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 14426 transitions. [2021-08-21 11:07:43,948 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) [2021-08-21 11:07:43,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 14426 transitions. [2021-08-21 11:07:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:43,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:43,952 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] [2021-08-21 11:07:43,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:44,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:44,177 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:44,178 INFO L82 PathProgramCache]: Analyzing trace with hash 430008055, now seen corresponding path program 54 times [2021-08-21 11:07:44,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:44,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707369466] [2021-08-21 11:07:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:44,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:44,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:44,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707369466] [2021-08-21 11:07:44,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707369466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:44,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543503786] [2021-08-21 11:07:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:07:44,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:44,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:44,289 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) [2021-08-21 11:07:44,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 11:07:47,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:07:47,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543503786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:47,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:47,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:47,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952144829] [2021-08-21 11:07:47,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:47,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:47,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:47,993 INFO L87 Difference]: Start difference. First operand 5234 states and 14426 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) [2021-08-21 11:07:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:49,021 INFO L93 Difference]: Finished difference Result 11160 states and 29630 transitions. [2021-08-21 11:07:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:07:49,021 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 [2021-08-21 11:07:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:49,077 INFO L225 Difference]: With dead ends: 11160 [2021-08-21 11:07:49,077 INFO L226 Difference]: Without dead ends: 10602 [2021-08-21 11:07:49,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=861, Invalid=3171, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:07:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10602 states. [2021-08-21 11:07:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10602 to 4829. [2021-08-21 11:07:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4829 states, 4828 states have (on average 2.715824357912179) internal successors, (13112), 4828 states have internal predecessors, (13112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4829 states to 4829 states and 13112 transitions. [2021-08-21 11:07:49,161 INFO L78 Accepts]: Start accepts. Automaton has 4829 states and 13112 transitions. Word has length 62 [2021-08-21 11:07:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:49,161 INFO L470 AbstractCegarLoop]: Abstraction has 4829 states and 13112 transitions. [2021-08-21 11:07:49,162 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) [2021-08-21 11:07:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4829 states and 13112 transitions. [2021-08-21 11:07:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:49,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:49,167 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] [2021-08-21 11:07:49,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 11:07:49,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:49,369 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash -227142561, now seen corresponding path program 55 times [2021-08-21 11:07:49,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:49,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859209642] [2021-08-21 11:07:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:49,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:49,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:49,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859209642] [2021-08-21 11:07:49,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859209642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:49,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495183495] [2021-08-21 11:07:49,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:07:49,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:49,473 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) [2021-08-21 11:07:49,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 11:07:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:52,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:53,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495183495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:53,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:53,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:53,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686768196] [2021-08-21 11:07:53,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:53,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:53,158 INFO L87 Difference]: Start difference. First operand 4829 states and 13112 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) [2021-08-21 11:07:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:53,753 INFO L93 Difference]: Finished difference Result 8130 states and 20461 transitions. [2021-08-21 11:07:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:07:53,754 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 [2021-08-21 11:07:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:53,764 INFO L225 Difference]: With dead ends: 8130 [2021-08-21 11:07:53,765 INFO L226 Difference]: Without dead ends: 7978 [2021-08-21 11:07:53,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 521.3ms TimeCoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:07:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2021-08-21 11:07:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 5059. [2021-08-21 11:07:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5059 states, 5058 states have (on average 2.727955713720838) internal successors, (13798), 5058 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 13798 transitions. [2021-08-21 11:07:53,839 INFO L78 Accepts]: Start accepts. Automaton has 5059 states and 13798 transitions. Word has length 62 [2021-08-21 11:07:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:53,839 INFO L470 AbstractCegarLoop]: Abstraction has 5059 states and 13798 transitions. [2021-08-21 11:07:53,839 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) [2021-08-21 11:07:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5059 states and 13798 transitions. [2021-08-21 11:07:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:53,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:53,844 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] [2021-08-21 11:07:53,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:54,068 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,SelfDestructingSolverStorable85 [2021-08-21 11:07:54,069 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash -602843055, now seen corresponding path program 56 times [2021-08-21 11:07:54,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:54,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877965653] [2021-08-21 11:07:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:54,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:54,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877965653] [2021-08-21 11:07:54,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877965653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:54,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042727083] [2021-08-21 11:07:54,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:07:54,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:54,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:54,233 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) [2021-08-21 11:07:54,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 11:07:57,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:07:57,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:07:57,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:07:57,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:07:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:58,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042727083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:58,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:07:58,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:07:58,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055462492] [2021-08-21 11:07:58,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:07:58,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:07:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:07:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:07:58,134 INFO L87 Difference]: Start difference. First operand 5059 states and 13798 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) [2021-08-21 11:07:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:07:58,805 INFO L93 Difference]: Finished difference Result 8144 states and 20511 transitions. [2021-08-21 11:07:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 11:07:58,806 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 [2021-08-21 11:07:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:07:58,816 INFO L225 Difference]: With dead ends: 8144 [2021-08-21 11:07:58,816 INFO L226 Difference]: Without dead ends: 7992 [2021-08-21 11:07:58,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:07:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2021-08-21 11:07:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 5124. [2021-08-21 11:07:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5124 states, 5123 states have (on average 2.721257075932071) internal successors, (13941), 5123 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:07:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5124 states to 5124 states and 13941 transitions. [2021-08-21 11:07:58,886 INFO L78 Accepts]: Start accepts. Automaton has 5124 states and 13941 transitions. Word has length 62 [2021-08-21 11:07:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:07:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 5124 states and 13941 transitions. [2021-08-21 11:07:58,886 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) [2021-08-21 11:07:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5124 states and 13941 transitions. [2021-08-21 11:07:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:07:58,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:07:58,891 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] [2021-08-21 11:07:58,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 11:07:59,097 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,SelfDestructingSolverStorable86 [2021-08-21 11:07:59,098 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:07:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:07:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1613656697, now seen corresponding path program 57 times [2021-08-21 11:07:59,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:07:59,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966965358] [2021-08-21 11:07:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:07:59,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:07:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:07:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:07:59,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:07:59,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966965358] [2021-08-21 11:07:59,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966965358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:07:59,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892028221] [2021-08-21 11:07:59,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:07:59,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:07:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:07:59,208 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) [2021-08-21 11:07:59,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 11:08:02,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:08:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:02,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:02,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892028221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:02,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:02,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:02,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556217426] [2021-08-21 11:08:02,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:02,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:02,996 INFO L87 Difference]: Start difference. First operand 5124 states and 13941 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) [2021-08-21 11:08:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:03,752 INFO L93 Difference]: Finished difference Result 8629 states and 21892 transitions. [2021-08-21 11:08:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 11:08:03,753 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 [2021-08-21 11:08:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:03,763 INFO L225 Difference]: With dead ends: 8629 [2021-08-21 11:08:03,763 INFO L226 Difference]: Without dead ends: 8477 [2021-08-21 11:08:03,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 709.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:08:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2021-08-21 11:08:03,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 5254. [2021-08-21 11:08:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 5253 states have (on average 2.7340567294879117) internal successors, (14362), 5253 states have internal predecessors, (14362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 14362 transitions. [2021-08-21 11:08:03,835 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 14362 transitions. Word has length 62 [2021-08-21 11:08:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:03,835 INFO L470 AbstractCegarLoop]: Abstraction has 5254 states and 14362 transitions. [2021-08-21 11:08:03,836 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) [2021-08-21 11:08:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 14362 transitions. [2021-08-21 11:08:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:03,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:03,840 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] [2021-08-21 11:08:03,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:04,052 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,SelfDestructingSolverStorable87 [2021-08-21 11:08:04,053 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1989357191, now seen corresponding path program 58 times [2021-08-21 11:08:04,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:04,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302953757] [2021-08-21 11:08:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:04,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:04,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:04,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302953757] [2021-08-21 11:08:04,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302953757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:04,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567937253] [2021-08-21 11:08:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:08:04,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:04,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:04,172 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) [2021-08-21 11:08:04,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 11:08:07,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:08:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:08,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567937253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:08,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:08,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:08,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064393150] [2021-08-21 11:08:08,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:08,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:08,070 INFO L87 Difference]: Start difference. First operand 5254 states and 14362 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) [2021-08-21 11:08:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:08,662 INFO L93 Difference]: Finished difference Result 9029 states and 22804 transitions. [2021-08-21 11:08:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:08:08,662 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 [2021-08-21 11:08:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:08,674 INFO L225 Difference]: With dead ends: 9029 [2021-08-21 11:08:08,674 INFO L226 Difference]: Without dead ends: 8877 [2021-08-21 11:08:08,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:08:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8877 states. [2021-08-21 11:08:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8877 to 5349. [2021-08-21 11:08:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.7453253552729993) internal successors, (14682), 5348 states have internal predecessors, (14682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 14682 transitions. [2021-08-21 11:08:08,754 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 14682 transitions. Word has length 62 [2021-08-21 11:08:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:08,754 INFO L470 AbstractCegarLoop]: Abstraction has 5349 states and 14682 transitions. [2021-08-21 11:08:08,754 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) [2021-08-21 11:08:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 14682 transitions. [2021-08-21 11:08:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:08,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:08,759 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] [2021-08-21 11:08:08,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:08,984 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,SelfDestructingSolverStorable88 [2021-08-21 11:08:08,985 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash -240583841, now seen corresponding path program 59 times [2021-08-21 11:08:08,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:08,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917342039] [2021-08-21 11:08:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:08,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:09,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:09,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917342039] [2021-08-21 11:08:09,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917342039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:09,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805864228] [2021-08-21 11:08:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:08:09,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:09,098 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) [2021-08-21 11:08:09,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 11:08:12,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:08:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:13,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805864228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:13,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:13,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:13,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289804879] [2021-08-21 11:08:13,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:13,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:13,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:13,019 INFO L87 Difference]: Start difference. First operand 5349 states and 14682 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) [2021-08-21 11:08:13,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:13,761 INFO L93 Difference]: Finished difference Result 9178 states and 23728 transitions. [2021-08-21 11:08:13,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 11:08:13,761 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 [2021-08-21 11:08:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:13,773 INFO L225 Difference]: With dead ends: 9178 [2021-08-21 11:08:13,773 INFO L226 Difference]: Without dead ends: 9026 [2021-08-21 11:08:13,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 680.3ms TimeCoverageRelationStatistics Valid=604, Invalid=2048, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:08:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9026 states. [2021-08-21 11:08:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9026 to 5454. [2021-08-21 11:08:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.759581881533101) internal successors, (15048), 5453 states have internal predecessors, (15048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 15048 transitions. [2021-08-21 11:08:13,853 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 15048 transitions. Word has length 62 [2021-08-21 11:08:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:13,853 INFO L470 AbstractCegarLoop]: Abstraction has 5454 states and 15048 transitions. [2021-08-21 11:08:13,853 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) [2021-08-21 11:08:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 15048 transitions. [2021-08-21 11:08:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:13,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:13,858 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] [2021-08-21 11:08:13,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:14,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:14,084 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1366637659, now seen corresponding path program 60 times [2021-08-21 11:08:14,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:14,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735647125] [2021-08-21 11:08:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:14,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:14,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:14,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735647125] [2021-08-21 11:08:14,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735647125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:14,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176452926] [2021-08-21 11:08:14,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:08:14,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:14,201 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) [2021-08-21 11:08:14,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 11:08:17,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:08:17,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:17,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:18,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176452926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:18,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:18,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:18,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745795951] [2021-08-21 11:08:18,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:18,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:18,046 INFO L87 Difference]: Start difference. First operand 5454 states and 15048 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) [2021-08-21 11:08:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:18,803 INFO L93 Difference]: Finished difference Result 9616 states and 25422 transitions. [2021-08-21 11:08:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:08:18,804 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 [2021-08-21 11:08:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:18,817 INFO L225 Difference]: With dead ends: 9616 [2021-08-21 11:08:18,817 INFO L226 Difference]: Without dead ends: 9464 [2021-08-21 11:08:18,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:08:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9464 states. [2021-08-21 11:08:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9464 to 5574. [2021-08-21 11:08:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5574 states, 5573 states have (on average 2.7674502063520547) internal successors, (15423), 5573 states have internal predecessors, (15423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 15423 transitions. [2021-08-21 11:08:18,904 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 15423 transitions. Word has length 62 [2021-08-21 11:08:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:18,904 INFO L470 AbstractCegarLoop]: Abstraction has 5574 states and 15423 transitions. [2021-08-21 11:08:18,904 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) [2021-08-21 11:08:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 15423 transitions. [2021-08-21 11:08:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:18,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:18,909 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] [2021-08-21 11:08:18,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:19,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:19,133 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash -707064919, now seen corresponding path program 61 times [2021-08-21 11:08:19,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:19,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060224611] [2021-08-21 11:08:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:19,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:19,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:19,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:19,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060224611] [2021-08-21 11:08:19,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060224611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:19,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566906039] [2021-08-21 11:08:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:08:19,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:19,247 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) [2021-08-21 11:08:19,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 11:08:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:22,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:23,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566906039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:23,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:23,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:23,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947012434] [2021-08-21 11:08:23,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:23,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:23,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:23,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:23,280 INFO L87 Difference]: Start difference. First operand 5574 states and 15423 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) [2021-08-21 11:08:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:24,238 INFO L93 Difference]: Finished difference Result 12140 states and 32165 transitions. [2021-08-21 11:08:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:08:24,238 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 [2021-08-21 11:08:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:24,255 INFO L225 Difference]: With dead ends: 12140 [2021-08-21 11:08:24,255 INFO L226 Difference]: Without dead ends: 11534 [2021-08-21 11:08:24,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=887, Invalid=3273, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 11:08:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11534 states. [2021-08-21 11:08:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11534 to 5506. [2021-08-21 11:08:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5506 states, 5505 states have (on average 2.7396911898274294) internal successors, (15082), 5505 states have internal predecessors, (15082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5506 states to 5506 states and 15082 transitions. [2021-08-21 11:08:24,353 INFO L78 Accepts]: Start accepts. Automaton has 5506 states and 15082 transitions. Word has length 62 [2021-08-21 11:08:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:24,353 INFO L470 AbstractCegarLoop]: Abstraction has 5506 states and 15082 transitions. [2021-08-21 11:08:24,353 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) [2021-08-21 11:08:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5506 states and 15082 transitions. [2021-08-21 11:08:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:24,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:24,358 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] [2021-08-21 11:08:24,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:24,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:24,560 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:24,560 INFO L82 PathProgramCache]: Analyzing trace with hash -128451085, now seen corresponding path program 62 times [2021-08-21 11:08:24,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:24,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831220396] [2021-08-21 11:08:24,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:24,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:24,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:24,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:24,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831220396] [2021-08-21 11:08:24,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831220396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:24,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124206349] [2021-08-21 11:08:24,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:08:24,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:24,691 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) [2021-08-21 11:08:24,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 11:08:28,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:08:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:28,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:28,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124206349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:28,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:28,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:28,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835308369] [2021-08-21 11:08:28,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:28,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:28,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:28,646 INFO L87 Difference]: Start difference. First operand 5506 states and 15082 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) [2021-08-21 11:08:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:29,492 INFO L93 Difference]: Finished difference Result 10108 states and 26667 transitions. [2021-08-21 11:08:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 11:08:29,492 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 [2021-08-21 11:08:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:29,505 INFO L225 Difference]: With dead ends: 10108 [2021-08-21 11:08:29,505 INFO L226 Difference]: Without dead ends: 9956 [2021-08-21 11:08:29,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 729.7ms TimeCoverageRelationStatistics Valid=855, Invalid=2805, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 11:08:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9956 states. [2021-08-21 11:08:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9956 to 5821. [2021-08-21 11:08:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.7640893470790378) internal successors, (16087), 5820 states have internal predecessors, (16087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 16087 transitions. [2021-08-21 11:08:29,587 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 16087 transitions. Word has length 62 [2021-08-21 11:08:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:29,587 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 16087 transitions. [2021-08-21 11:08:29,587 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) [2021-08-21 11:08:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 16087 transitions. [2021-08-21 11:08:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:29,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:29,593 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] [2021-08-21 11:08:29,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:29,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:29,799 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:29,799 INFO L82 PathProgramCache]: Analyzing trace with hash 531121655, now seen corresponding path program 63 times [2021-08-21 11:08:29,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:29,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737416711] [2021-08-21 11:08:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:29,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:29,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:29,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737416711] [2021-08-21 11:08:29,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737416711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:29,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493519382] [2021-08-21 11:08:29,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:08:29,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:29,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:29,916 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) [2021-08-21 11:08:29,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 11:08:33,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:08:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:33,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:33,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493519382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:33,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:33,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:33,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035562118] [2021-08-21 11:08:33,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:33,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:33,958 INFO L87 Difference]: Start difference. First operand 5821 states and 16087 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) [2021-08-21 11:08:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:35,199 INFO L93 Difference]: Finished difference Result 12098 states and 32187 transitions. [2021-08-21 11:08:35,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 11:08:35,199 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 [2021-08-21 11:08:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:35,217 INFO L225 Difference]: With dead ends: 12098 [2021-08-21 11:08:35,217 INFO L226 Difference]: Without dead ends: 11540 [2021-08-21 11:08:35,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1105.6ms TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 11:08:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11540 states. [2021-08-21 11:08:35,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11540 to 5436. [2021-08-21 11:08:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5436 states, 5435 states have (on average 2.742778288868445) internal successors, (14907), 5435 states have internal predecessors, (14907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5436 states to 5436 states and 14907 transitions. [2021-08-21 11:08:35,315 INFO L78 Accepts]: Start accepts. Automaton has 5436 states and 14907 transitions. Word has length 62 [2021-08-21 11:08:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:35,315 INFO L470 AbstractCegarLoop]: Abstraction has 5436 states and 14907 transitions. [2021-08-21 11:08:35,315 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) [2021-08-21 11:08:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 5436 states and 14907 transitions. [2021-08-21 11:08:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:35,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:35,320 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] [2021-08-21 11:08:35,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 11:08:35,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:35,537 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1042940369, now seen corresponding path program 64 times [2021-08-21 11:08:35,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:35,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044781309] [2021-08-21 11:08:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:35,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:35,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:35,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044781309] [2021-08-21 11:08:35,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044781309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:35,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180231019] [2021-08-21 11:08:35,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:08:35,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:35,661 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) [2021-08-21 11:08:35,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 11:08:39,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:08:39,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:39,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180231019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:39,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:39,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:39,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133453381] [2021-08-21 11:08:39,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:39,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:39,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:39,760 INFO L87 Difference]: Start difference. First operand 5436 states and 14907 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) [2021-08-21 11:08:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:40,770 INFO L93 Difference]: Finished difference Result 10288 states and 26372 transitions. [2021-08-21 11:08:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:08:40,770 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 [2021-08-21 11:08:40,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:40,784 INFO L225 Difference]: With dead ends: 10288 [2021-08-21 11:08:40,785 INFO L226 Difference]: Without dead ends: 10136 [2021-08-21 11:08:40,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 907.1ms TimeCoverageRelationStatistics Valid=884, Invalid=2776, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 11:08:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-08-21 11:08:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 5486. [2021-08-21 11:08:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5485 states have (on average 2.754238833181404) internal successors, (15107), 5485 states have internal predecessors, (15107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 15107 transitions. [2021-08-21 11:08:40,878 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 15107 transitions. Word has length 62 [2021-08-21 11:08:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:40,878 INFO L470 AbstractCegarLoop]: Abstraction has 5486 states and 15107 transitions. [2021-08-21 11:08:40,878 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) [2021-08-21 11:08:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 15107 transitions. [2021-08-21 11:08:40,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:40,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:40,883 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] [2021-08-21 11:08:40,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 11:08:41,104 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,SelfDestructingSolverStorable94 [2021-08-21 11:08:41,104 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:41,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:41,104 INFO L82 PathProgramCache]: Analyzing trace with hash -83113449, now seen corresponding path program 65 times [2021-08-21 11:08:41,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:41,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721334968] [2021-08-21 11:08:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:41,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:41,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:41,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721334968] [2021-08-21 11:08:41,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721334968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:41,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423471755] [2021-08-21 11:08:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:08:41,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:41,234 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) [2021-08-21 11:08:41,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 11:08:44,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:08:44,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:44,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423471755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:45,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:45,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:45,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979892267] [2021-08-21 11:08:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:45,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:45,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:45,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:45,297 INFO L87 Difference]: Start difference. First operand 5486 states and 15107 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) [2021-08-21 11:08:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:46,284 INFO L93 Difference]: Finished difference Result 10380 states and 27399 transitions. [2021-08-21 11:08:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:08:46,285 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 [2021-08-21 11:08:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:46,300 INFO L225 Difference]: With dead ends: 10380 [2021-08-21 11:08:46,301 INFO L226 Difference]: Without dead ends: 10228 [2021-08-21 11:08:46,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 901.9ms TimeCoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 11:08:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10228 states. [2021-08-21 11:08:46,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10228 to 5606. [2021-08-21 11:08:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5606 states, 5605 states have (on average 2.7621766280107045) internal successors, (15482), 5605 states have internal predecessors, (15482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5606 states to 5606 states and 15482 transitions. [2021-08-21 11:08:46,393 INFO L78 Accepts]: Start accepts. Automaton has 5606 states and 15482 transitions. Word has length 62 [2021-08-21 11:08:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 5606 states and 15482 transitions. [2021-08-21 11:08:46,394 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) [2021-08-21 11:08:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5606 states and 15482 transitions. [2021-08-21 11:08:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:46,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:46,398 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] [2021-08-21 11:08:46,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 11:08:46,621 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,SelfDestructingSolverStorable95 [2021-08-21 11:08:46,622 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:46,622 INFO L82 PathProgramCache]: Analyzing trace with hash 576459291, now seen corresponding path program 66 times [2021-08-21 11:08:46,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:46,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643461414] [2021-08-21 11:08:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:46,622 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:46,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:46,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643461414] [2021-08-21 11:08:46,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643461414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:46,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535163435] [2021-08-21 11:08:46,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:08:46,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:46,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:46,738 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) [2021-08-21 11:08:46,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 11:08:50,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:08:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:08:50,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:50,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535163435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:50,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:50,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:50,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204463504] [2021-08-21 11:08:50,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:50,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:50,632 INFO L87 Difference]: Start difference. First operand 5606 states and 15482 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) [2021-08-21 11:08:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:52,015 INFO L93 Difference]: Finished difference Result 12640 states and 33584 transitions. [2021-08-21 11:08:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 11:08:52,015 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 [2021-08-21 11:08:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:52,033 INFO L225 Difference]: With dead ends: 12640 [2021-08-21 11:08:52,033 INFO L226 Difference]: Without dead ends: 12082 [2021-08-21 11:08:52,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1255.4ms TimeCoverageRelationStatistics Valid=1196, Invalid=4206, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 11:08:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12082 states. [2021-08-21 11:08:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12082 to 5506. [2021-08-21 11:08:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5506 states, 5505 states have (on average 2.7440508628519527) internal successors, (15106), 5505 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:52,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5506 states to 5506 states and 15106 transitions. [2021-08-21 11:08:52,142 INFO L78 Accepts]: Start accepts. Automaton has 5506 states and 15106 transitions. Word has length 62 [2021-08-21 11:08:52,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:52,142 INFO L470 AbstractCegarLoop]: Abstraction has 5506 states and 15106 transitions. [2021-08-21 11:08:52,142 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) [2021-08-21 11:08:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5506 states and 15106 transitions. [2021-08-21 11:08:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:52,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:52,148 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] [2021-08-21 11:08:52,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 11:08:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:52,361 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:52,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2145924133, now seen corresponding path program 67 times [2021-08-21 11:08:52,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:52,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007871551] [2021-08-21 11:08:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:52,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:52,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:52,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007871551] [2021-08-21 11:08:52,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007871551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:52,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307933943] [2021-08-21 11:08:52,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:08:52,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:52,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:52,505 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) [2021-08-21 11:08:52,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 11:08:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:56,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:08:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:08:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:56,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307933943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:56,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:08:56,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:08:56,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054985788] [2021-08-21 11:08:56,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:08:56,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:08:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:08:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:08:56,853 INFO L87 Difference]: Start difference. First operand 5506 states and 15106 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) [2021-08-21 11:08:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:08:58,213 INFO L93 Difference]: Finished difference Result 12650 states and 33460 transitions. [2021-08-21 11:08:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 11:08:58,213 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 [2021-08-21 11:08:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:08:58,230 INFO L225 Difference]: With dead ends: 12650 [2021-08-21 11:08:58,230 INFO L226 Difference]: Without dead ends: 11798 [2021-08-21 11:08:58,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1218.2ms TimeCoverageRelationStatistics Valid=1140, Invalid=4262, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 11:08:58,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11798 states. [2021-08-21 11:08:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11798 to 5406. [2021-08-21 11:08:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5406 states, 5405 states have (on average 2.7796484736355227) internal successors, (15024), 5405 states have internal predecessors, (15024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:08:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 15024 transitions. [2021-08-21 11:08:58,324 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 15024 transitions. Word has length 62 [2021-08-21 11:08:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:08:58,324 INFO L470 AbstractCegarLoop]: Abstraction has 5406 states and 15024 transitions. [2021-08-21 11:08:58,324 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) [2021-08-21 11:08:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 15024 transitions. [2021-08-21 11:08:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:08:58,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:08:58,329 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] [2021-08-21 11:08:58,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 11:08:58,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:58,555 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:08:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:08:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1060539167, now seen corresponding path program 68 times [2021-08-21 11:08:58,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:08:58,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474945883] [2021-08-21 11:08:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:08:58,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:08:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:08:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:08:58,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:08:58,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474945883] [2021-08-21 11:08:58,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474945883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:08:58,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35939289] [2021-08-21 11:08:58,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:08:58,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:08:58,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:08:58,691 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) [2021-08-21 11:08:58,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 11:09:02,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:09:02,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:09:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:03,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35939289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:03,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:03,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:09:03,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256894125] [2021-08-21 11:09:03,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:09:03,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:03,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:09:03,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:09:03,281 INFO L87 Difference]: Start difference. First operand 5406 states and 15024 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) [2021-08-21 11:09:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:03,717 INFO L93 Difference]: Finished difference Result 8068 states and 21021 transitions. [2021-08-21 11:09:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:09:03,717 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 [2021-08-21 11:09:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:03,727 INFO L225 Difference]: With dead ends: 8068 [2021-08-21 11:09:03,728 INFO L226 Difference]: Without dead ends: 7916 [2021-08-21 11:09:03,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=343, Invalid=1063, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:09:03,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-08-21 11:09:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 5381. [2021-08-21 11:09:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 5380 states have (on average 2.782342007434944) internal successors, (14969), 5380 states have internal predecessors, (14969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 14969 transitions. [2021-08-21 11:09:03,794 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 14969 transitions. Word has length 62 [2021-08-21 11:09:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:03,794 INFO L470 AbstractCegarLoop]: Abstraction has 5381 states and 14969 transitions. [2021-08-21 11:09:03,794 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) [2021-08-21 11:09:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 14969 transitions. [2021-08-21 11:09:03,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 11:09:03,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:03,799 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] [2021-08-21 11:09:03,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:04,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:04,017 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1134647527, now seen corresponding path program 69 times [2021-08-21 11:09:04,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:04,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968398249] [2021-08-21 11:09:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:04,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:04,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:04,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968398249] [2021-08-21 11:09:04,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968398249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:04,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908073405] [2021-08-21 11:09:04,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:09:04,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:04,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:04,159 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) [2021-08-21 11:09:04,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 11:09:08,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:09:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 11:09:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:08,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908073405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:08,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:08,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 11:09:08,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328859835] [2021-08-21 11:09:08,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 11:09:08,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:08,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 11:09:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 11:09:08,728 INFO L87 Difference]: Start difference. First operand 5381 states and 14969 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) [2021-08-21 11:09:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:09,989 INFO L93 Difference]: Finished difference Result 11639 states and 31175 transitions. [2021-08-21 11:09:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:09:09,989 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 [2021-08-21 11:09:09,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:10,005 INFO L225 Difference]: With dead ends: 11639 [2021-08-21 11:09:10,005 INFO L226 Difference]: Without dead ends: 11081 [2021-08-21 11:09:10,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1177.0ms TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 11:09:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11081 states. [2021-08-21 11:09:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11081 to 5401. [2021-08-21 11:09:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5401 states, 5400 states have (on average 2.7890740740740743) internal successors, (15061), 5400 states have internal predecessors, (15061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5401 states to 5401 states and 15061 transitions. [2021-08-21 11:09:10,091 INFO L78 Accepts]: Start accepts. Automaton has 5401 states and 15061 transitions. Word has length 62 [2021-08-21 11:09:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 5401 states and 15061 transitions. [2021-08-21 11:09:10,091 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) [2021-08-21 11:09:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 5401 states and 15061 transitions. [2021-08-21 11:09:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:10,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:10,098 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] [2021-08-21 11:09:10,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:10,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:10,325 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1097377418, now seen corresponding path program 70 times [2021-08-21 11:09:10,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:10,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808273431] [2021-08-21 11:09:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:10,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:10,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:10,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808273431] [2021-08-21 11:09:10,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808273431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:10,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398883157] [2021-08-21 11:09:10,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:09:10,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:10,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:10,509 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) [2021-08-21 11:09:10,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 11:09:14,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:09:14,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:14,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:14,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398883157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:15,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:15,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:15,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431119513] [2021-08-21 11:09:15,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:15,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:15,037 INFO L87 Difference]: Start difference. First operand 5401 states and 15061 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) [2021-08-21 11:09:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:15,416 INFO L93 Difference]: Finished difference Result 8026 states and 20991 transitions. [2021-08-21 11:09:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 11:09:15,416 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 [2021-08-21 11:09:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:15,427 INFO L225 Difference]: With dead ends: 8026 [2021-08-21 11:09:15,427 INFO L226 Difference]: Without dead ends: 7874 [2021-08-21 11:09:15,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=376, Invalid=956, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 11:09:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7874 states. [2021-08-21 11:09:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7874 to 5491. [2021-08-21 11:09:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5491 states, 5490 states have (on average 2.7794171220400727) internal successors, (15259), 5490 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5491 states to 5491 states and 15259 transitions. [2021-08-21 11:09:15,501 INFO L78 Accepts]: Start accepts. Automaton has 5491 states and 15259 transitions. Word has length 67 [2021-08-21 11:09:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:15,501 INFO L470 AbstractCegarLoop]: Abstraction has 5491 states and 15259 transitions. [2021-08-21 11:09:15,501 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) [2021-08-21 11:09:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5491 states and 15259 transitions. [2021-08-21 11:09:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:15,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:15,506 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] [2021-08-21 11:09:15,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:15,733 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,SelfDestructingSolverStorable100 [2021-08-21 11:09:15,733 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 428168706, now seen corresponding path program 71 times [2021-08-21 11:09:15,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:15,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113275048] [2021-08-21 11:09:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:15,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:15,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113275048] [2021-08-21 11:09:15,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113275048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:15,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889743444] [2021-08-21 11:09:15,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:09:15,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:15,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:15,970 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) [2021-08-21 11:09:16,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 11:09:19,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:09:19,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:20,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889743444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:20,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:20,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:20,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251667479] [2021-08-21 11:09:20,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:20,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:20,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:20,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:20,556 INFO L87 Difference]: Start difference. First operand 5491 states and 15259 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) [2021-08-21 11:09:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:21,025 INFO L93 Difference]: Finished difference Result 8082 states and 21111 transitions. [2021-08-21 11:09:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:09:21,025 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 [2021-08-21 11:09:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:21,037 INFO L225 Difference]: With dead ends: 8082 [2021-08-21 11:09:21,037 INFO L226 Difference]: Without dead ends: 7930 [2021-08-21 11:09:21,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:09:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7930 states. [2021-08-21 11:09:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7930 to 5566. [2021-08-21 11:09:21,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5566 states, 5565 states have (on average 2.7716082659478887) internal successors, (15424), 5565 states have internal predecessors, (15424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 15424 transitions. [2021-08-21 11:09:21,104 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 15424 transitions. Word has length 67 [2021-08-21 11:09:21,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:21,104 INFO L470 AbstractCegarLoop]: Abstraction has 5566 states and 15424 transitions. [2021-08-21 11:09:21,105 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) [2021-08-21 11:09:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 15424 transitions. [2021-08-21 11:09:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:21,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:21,110 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] [2021-08-21 11:09:21,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 11:09:21,331 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,SelfDestructingSolverStorable101 [2021-08-21 11:09:21,331 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:21,331 INFO L82 PathProgramCache]: Analyzing trace with hash 52468212, now seen corresponding path program 72 times [2021-08-21 11:09:21,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:21,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857358142] [2021-08-21 11:09:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:21,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:21,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:21,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857358142] [2021-08-21 11:09:21,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857358142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:21,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793455296] [2021-08-21 11:09:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:09:21,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:21,468 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) [2021-08-21 11:09:21,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 11:09:25,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:09:25,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:26,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793455296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:26,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:26,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:26,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397239982] [2021-08-21 11:09:26,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:26,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:26,108 INFO L87 Difference]: Start difference. First operand 5566 states and 15424 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) [2021-08-21 11:09:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:26,563 INFO L93 Difference]: Finished difference Result 8212 states and 21381 transitions. [2021-08-21 11:09:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 11:09:26,563 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 [2021-08-21 11:09:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:26,574 INFO L225 Difference]: With dead ends: 8212 [2021-08-21 11:09:26,575 INFO L226 Difference]: Without dead ends: 8060 [2021-08-21 11:09:26,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=430, Invalid=1130, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:09:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-08-21 11:09:26,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 5566. [2021-08-21 11:09:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5566 states, 5565 states have (on average 2.7716082659478887) internal successors, (15424), 5565 states have internal predecessors, (15424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 15424 transitions. [2021-08-21 11:09:26,650 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 15424 transitions. Word has length 67 [2021-08-21 11:09:26,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:26,650 INFO L470 AbstractCegarLoop]: Abstraction has 5566 states and 15424 transitions. [2021-08-21 11:09:26,650 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) [2021-08-21 11:09:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 15424 transitions. [2021-08-21 11:09:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:26,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:26,655 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] [2021-08-21 11:09:26,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:26,857 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,SelfDestructingSolverStorable102 [2021-08-21 11:09:26,857 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1437248536, now seen corresponding path program 73 times [2021-08-21 11:09:26,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:26,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332634149] [2021-08-21 11:09:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:26,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:27,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:27,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332634149] [2021-08-21 11:09:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332634149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:27,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193154449] [2021-08-21 11:09:27,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:09:27,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:27,083 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) [2021-08-21 11:09:27,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 11:09:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:31,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193154449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:31,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:31,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:31,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264982009] [2021-08-21 11:09:31,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:31,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:31,731 INFO L87 Difference]: Start difference. First operand 5566 states and 15424 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) [2021-08-21 11:09:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:32,168 INFO L93 Difference]: Finished difference Result 8136 states and 21241 transitions. [2021-08-21 11:09:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 11:09:32,168 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 [2021-08-21 11:09:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:32,179 INFO L225 Difference]: With dead ends: 8136 [2021-08-21 11:09:32,179 INFO L226 Difference]: Without dead ends: 7984 [2021-08-21 11:09:32,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 11:09:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7984 states. [2021-08-21 11:09:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7984 to 5566. [2021-08-21 11:09:32,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5566 states, 5565 states have (on average 2.7716082659478887) internal successors, (15424), 5565 states have internal predecessors, (15424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 15424 transitions. [2021-08-21 11:09:32,251 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 15424 transitions. Word has length 67 [2021-08-21 11:09:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:32,251 INFO L470 AbstractCegarLoop]: Abstraction has 5566 states and 15424 transitions. [2021-08-21 11:09:32,251 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) [2021-08-21 11:09:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 15424 transitions. [2021-08-21 11:09:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:32,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:32,256 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] [2021-08-21 11:09:32,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:32,464 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,SelfDestructingSolverStorable103 [2021-08-21 11:09:32,465 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2128302326, now seen corresponding path program 74 times [2021-08-21 11:09:32,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:32,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841417884] [2021-08-21 11:09:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:32,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:32,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:32,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841417884] [2021-08-21 11:09:32,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841417884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:32,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908815744] [2021-08-21 11:09:32,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:09:32,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:32,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:32,594 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) [2021-08-21 11:09:32,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 11:09:36,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:09:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:37,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908815744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:37,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:37,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:37,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242707304] [2021-08-21 11:09:37,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:37,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:37,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:37,312 INFO L87 Difference]: Start difference. First operand 5566 states and 15424 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) [2021-08-21 11:09:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:37,771 INFO L93 Difference]: Finished difference Result 8155 states and 21254 transitions. [2021-08-21 11:09:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:09:37,771 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 [2021-08-21 11:09:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:37,783 INFO L225 Difference]: With dead ends: 8155 [2021-08-21 11:09:37,783 INFO L226 Difference]: Without dead ends: 8003 [2021-08-21 11:09:37,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:09:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8003 states. [2021-08-21 11:09:37,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8003 to 5691. [2021-08-21 11:09:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 5690 states have (on average 2.7590509666080845) internal successors, (15699), 5690 states have internal predecessors, (15699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 15699 transitions. [2021-08-21 11:09:37,863 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 15699 transitions. Word has length 67 [2021-08-21 11:09:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:37,864 INFO L470 AbstractCegarLoop]: Abstraction has 5691 states and 15699 transitions. [2021-08-21 11:09:37,864 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) [2021-08-21 11:09:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 15699 transitions. [2021-08-21 11:09:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:37,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:37,869 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] [2021-08-21 11:09:37,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 11:09:38,074 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,SelfDestructingSolverStorable104 [2021-08-21 11:09:38,075 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1752601832, now seen corresponding path program 75 times [2021-08-21 11:09:38,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:38,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184084022] [2021-08-21 11:09:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:38,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:38,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:38,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184084022] [2021-08-21 11:09:38,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184084022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:38,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022881100] [2021-08-21 11:09:38,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:09:38,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:38,210 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) [2021-08-21 11:09:38,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 11:09:42,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:09:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:42,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022881100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:42,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:42,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:42,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501814979] [2021-08-21 11:09:42,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:42,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:42,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:42,874 INFO L87 Difference]: Start difference. First operand 5691 states and 15699 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) [2021-08-21 11:09:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:43,378 INFO L93 Difference]: Finished difference Result 8396 states and 21749 transitions. [2021-08-21 11:09:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:09:43,378 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 [2021-08-21 11:09:43,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:43,390 INFO L225 Difference]: With dead ends: 8396 [2021-08-21 11:09:43,391 INFO L226 Difference]: Without dead ends: 8244 [2021-08-21 11:09:43,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=501, Invalid=1391, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:09:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8244 states. [2021-08-21 11:09:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8244 to 5741. [2021-08-21 11:09:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5741 states, 5740 states have (on average 2.7541811846689894) internal successors, (15809), 5740 states have internal predecessors, (15809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5741 states to 5741 states and 15809 transitions. [2021-08-21 11:09:43,472 INFO L78 Accepts]: Start accepts. Automaton has 5741 states and 15809 transitions. Word has length 67 [2021-08-21 11:09:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 5741 states and 15809 transitions. [2021-08-21 11:09:43,472 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) [2021-08-21 11:09:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5741 states and 15809 transitions. [2021-08-21 11:09:43,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:43,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:43,477 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, 1, 1, 1, 1, 1] [2021-08-21 11:09:43,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:43,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:43,705 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2131533842, now seen corresponding path program 22 times [2021-08-21 11:09:43,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:43,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687841513] [2021-08-21 11:09:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:43,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:43,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:43,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687841513] [2021-08-21 11:09:43,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687841513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:43,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129219575] [2021-08-21 11:09:43,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:09:43,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:43,899 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) [2021-08-21 11:09:43,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 11:09:47,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:09:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:47,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129219575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:48,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:48,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:09:48,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927703955] [2021-08-21 11:09:48,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:09:48,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:09:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:09:48,474 INFO L87 Difference]: Start difference. First operand 5741 states and 15809 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:48,890 INFO L93 Difference]: Finished difference Result 8262 states and 21547 transitions. [2021-08-21 11:09:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:09:48,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:09:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:48,902 INFO L225 Difference]: With dead ends: 8262 [2021-08-21 11:09:48,902 INFO L226 Difference]: Without dead ends: 7958 [2021-08-21 11:09:48,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=462, Invalid=1344, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:09:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-08-21 11:09:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 5821. [2021-08-21 11:09:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.7446735395189004) internal successors, (15974), 5820 states have internal predecessors, (15974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 15974 transitions. [2021-08-21 11:09:48,982 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 15974 transitions. Word has length 67 [2021-08-21 11:09:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:48,982 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 15974 transitions. [2021-08-21 11:09:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 15974 transitions. [2021-08-21 11:09:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:48,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:48,988 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] [2021-08-21 11:09:49,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:49,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:49,199 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:49,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:49,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1509692112, now seen corresponding path program 76 times [2021-08-21 11:09:49,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:49,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51373516] [2021-08-21 11:09:49,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:49,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:49,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:49,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51373516] [2021-08-21 11:09:49,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51373516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:49,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341237831] [2021-08-21 11:09:49,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:09:49,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:49,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:49,352 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) [2021-08-21 11:09:49,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 11:09:53,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:09:53,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:53,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:09:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:54,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341237831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:54,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:09:54,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:09:54,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892692116] [2021-08-21 11:09:54,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:09:54,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:09:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:09:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:09:54,293 INFO L87 Difference]: Start difference. First operand 5821 states and 15974 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) [2021-08-21 11:09:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:09:54,784 INFO L93 Difference]: Finished difference Result 8290 states and 21559 transitions. [2021-08-21 11:09:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:09:54,784 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 [2021-08-21 11:09:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:09:54,796 INFO L225 Difference]: With dead ends: 8290 [2021-08-21 11:09:54,796 INFO L226 Difference]: Without dead ends: 8138 [2021-08-21 11:09:54,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 512.4ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:09:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8138 states. [2021-08-21 11:09:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8138 to 5821. [2021-08-21 11:09:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.7446735395189004) internal successors, (15974), 5820 states have internal predecessors, (15974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:09:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 15974 transitions. [2021-08-21 11:09:54,873 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 15974 transitions. Word has length 67 [2021-08-21 11:09:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:09:54,873 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 15974 transitions. [2021-08-21 11:09:54,873 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) [2021-08-21 11:09:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 15974 transitions. [2021-08-21 11:09:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:09:54,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:09:54,879 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] [2021-08-21 11:09:54,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 11:09:55,092 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,SelfDestructingSolverStorable107 [2021-08-21 11:09:55,093 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:09:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:09:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1133991618, now seen corresponding path program 77 times [2021-08-21 11:09:55,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:09:55,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25833817] [2021-08-21 11:09:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:09:55,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:09:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:09:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:09:55,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:09:55,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25833817] [2021-08-21 11:09:55,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25833817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:09:55,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086351109] [2021-08-21 11:09:55,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:09:55,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:09:55,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:09:55,259 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) [2021-08-21 11:09:55,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 11:09:59,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:09:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:09:59,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:09:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:00,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086351109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:00,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:00,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:00,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569945259] [2021-08-21 11:10:00,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:00,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:00,238 INFO L87 Difference]: Start difference. First operand 5821 states and 15974 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) [2021-08-21 11:10:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:00,718 INFO L93 Difference]: Finished difference Result 8241 states and 21456 transitions. [2021-08-21 11:10:00,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:10:00,718 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 [2021-08-21 11:10:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:00,731 INFO L225 Difference]: With dead ends: 8241 [2021-08-21 11:10:00,731 INFO L226 Difference]: Without dead ends: 8089 [2021-08-21 11:10:00,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:10:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8089 states. [2021-08-21 11:10:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8089 to 5821. [2021-08-21 11:10:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.7446735395189004) internal successors, (15974), 5820 states have internal predecessors, (15974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 15974 transitions. [2021-08-21 11:10:00,807 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 15974 transitions. Word has length 67 [2021-08-21 11:10:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:00,808 INFO L470 AbstractCegarLoop]: Abstraction has 5821 states and 15974 transitions. [2021-08-21 11:10:00,808 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) [2021-08-21 11:10:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 15974 transitions. [2021-08-21 11:10:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:00,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:00,813 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] [2021-08-21 11:10:00,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 11:10:01,041 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,SelfDestructingSolverStorable108 [2021-08-21 11:10:01,041 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:01,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1893907118, now seen corresponding path program 78 times [2021-08-21 11:10:01,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:01,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081354299] [2021-08-21 11:10:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:01,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:01,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:01,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081354299] [2021-08-21 11:10:01,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081354299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:01,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566004875] [2021-08-21 11:10:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:10:01,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:01,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:01,156 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) [2021-08-21 11:10:01,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 11:10:05,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:10:05,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:05,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:06,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566004875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:06,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:06,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:06,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500595214] [2021-08-21 11:10:06,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:06,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:06,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:06,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:06,256 INFO L87 Difference]: Start difference. First operand 5821 states and 15974 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) [2021-08-21 11:10:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:06,716 INFO L93 Difference]: Finished difference Result 8216 states and 21393 transitions. [2021-08-21 11:10:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:10:06,716 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 [2021-08-21 11:10:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:06,729 INFO L225 Difference]: With dead ends: 8216 [2021-08-21 11:10:06,729 INFO L226 Difference]: Without dead ends: 8064 [2021-08-21 11:10:06,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:10:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2021-08-21 11:10:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 5746. [2021-08-21 11:10:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5746 states, 5745 states have (on average 2.7517841601392514) internal successors, (15809), 5745 states have internal predecessors, (15809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5746 states to 5746 states and 15809 transitions. [2021-08-21 11:10:06,819 INFO L78 Accepts]: Start accepts. Automaton has 5746 states and 15809 transitions. Word has length 67 [2021-08-21 11:10:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 5746 states and 15809 transitions. [2021-08-21 11:10:06,819 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) [2021-08-21 11:10:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 5746 states and 15809 transitions. [2021-08-21 11:10:06,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:06,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:06,825 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] [2021-08-21 11:10:06,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:07,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:07,044 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1653608066, now seen corresponding path program 79 times [2021-08-21 11:10:07,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:07,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779450584] [2021-08-21 11:10:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:07,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:07,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:07,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779450584] [2021-08-21 11:10:07,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779450584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:07,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604651845] [2021-08-21 11:10:07,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:10:07,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:07,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:07,171 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) [2021-08-21 11:10:07,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 11:10:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:11,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:12,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604651845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:12,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:12,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:12,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207526750] [2021-08-21 11:10:12,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:12,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:12,121 INFO L87 Difference]: Start difference. First operand 5746 states and 15809 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) [2021-08-21 11:10:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:12,593 INFO L93 Difference]: Finished difference Result 8259 states and 21470 transitions. [2021-08-21 11:10:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:10:12,593 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 [2021-08-21 11:10:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:12,604 INFO L225 Difference]: With dead ends: 8259 [2021-08-21 11:10:12,604 INFO L226 Difference]: Without dead ends: 8107 [2021-08-21 11:10:12,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=491, Invalid=1401, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:10:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2021-08-21 11:10:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 5891. [2021-08-21 11:10:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 5890 states have (on average 2.7382003395585737) internal successors, (16128), 5890 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 16128 transitions. [2021-08-21 11:10:12,712 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 16128 transitions. Word has length 67 [2021-08-21 11:10:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:12,712 INFO L470 AbstractCegarLoop]: Abstraction has 5891 states and 16128 transitions. [2021-08-21 11:10:12,712 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) [2021-08-21 11:10:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 16128 transitions. [2021-08-21 11:10:12,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:12,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:12,718 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] [2021-08-21 11:10:12,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:12,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:12,949 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:12,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1277907572, now seen corresponding path program 80 times [2021-08-21 11:10:12,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:12,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49606270] [2021-08-21 11:10:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:12,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:13,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:13,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49606270] [2021-08-21 11:10:13,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49606270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:13,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952696646] [2021-08-21 11:10:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:10:13,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:13,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:13,060 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) [2021-08-21 11:10:13,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 11:10:17,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:10:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:18,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952696646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:18,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:18,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:18,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065101993] [2021-08-21 11:10:18,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:18,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:18,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:18,101 INFO L87 Difference]: Start difference. First operand 5891 states and 16128 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) [2021-08-21 11:10:18,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:18,726 INFO L93 Difference]: Finished difference Result 8492 states and 21941 transitions. [2021-08-21 11:10:18,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:10:18,726 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 [2021-08-21 11:10:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:18,739 INFO L225 Difference]: With dead ends: 8492 [2021-08-21 11:10:18,739 INFO L226 Difference]: Without dead ends: 8340 [2021-08-21 11:10:18,739 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 673.7ms TimeCoverageRelationStatistics Valid=541, Invalid=1529, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:10:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-08-21 11:10:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5911. [2021-08-21 11:10:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5911 states, 5910 states have (on average 2.736379018612521) internal successors, (16172), 5910 states have internal predecessors, (16172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5911 states to 5911 states and 16172 transitions. [2021-08-21 11:10:18,822 INFO L78 Accepts]: Start accepts. Automaton has 5911 states and 16172 transitions. Word has length 67 [2021-08-21 11:10:18,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:18,823 INFO L470 AbstractCegarLoop]: Abstraction has 5911 states and 16172 transitions. [2021-08-21 11:10:18,823 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) [2021-08-21 11:10:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5911 states and 16172 transitions. [2021-08-21 11:10:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:18,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:18,828 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] [2021-08-21 11:10:18,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:19,044 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,SelfDestructingSolverStorable111 [2021-08-21 11:10:19,045 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash 863728080, now seen corresponding path program 81 times [2021-08-21 11:10:19,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:19,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074313068] [2021-08-21 11:10:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:19,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:19,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:19,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074313068] [2021-08-21 11:10:19,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074313068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:19,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328350552] [2021-08-21 11:10:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:10:19,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:19,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:19,183 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) [2021-08-21 11:10:19,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 11:10:23,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:10:23,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:23,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328350552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:24,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:24,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:24,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098125612] [2021-08-21 11:10:24,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:24,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:24,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:24,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:24,332 INFO L87 Difference]: Start difference. First operand 5911 states and 16172 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) [2021-08-21 11:10:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:24,929 INFO L93 Difference]: Finished difference Result 8516 states and 21973 transitions. [2021-08-21 11:10:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:10:24,929 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 [2021-08-21 11:10:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:24,941 INFO L225 Difference]: With dead ends: 8516 [2021-08-21 11:10:24,942 INFO L226 Difference]: Without dead ends: 8364 [2021-08-21 11:10:24,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=598, Invalid=1658, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:10:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8364 states. [2021-08-21 11:10:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8364 to 5976. [2021-08-21 11:10:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5976 states, 5975 states have (on average 2.7305439330543932) internal successors, (16315), 5975 states have internal predecessors, (16315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5976 states to 5976 states and 16315 transitions. [2021-08-21 11:10:25,078 INFO L78 Accepts]: Start accepts. Automaton has 5976 states and 16315 transitions. Word has length 67 [2021-08-21 11:10:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:25,078 INFO L470 AbstractCegarLoop]: Abstraction has 5976 states and 16315 transitions. [2021-08-21 11:10:25,078 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) [2021-08-21 11:10:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5976 states and 16315 transitions. [2021-08-21 11:10:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:25,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:25,084 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] [2021-08-21 11:10:25,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:25,296 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,SelfDestructingSolverStorable112 [2021-08-21 11:10:25,297 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 488027586, now seen corresponding path program 82 times [2021-08-21 11:10:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:25,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269724004] [2021-08-21 11:10:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:25,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:25,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:25,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269724004] [2021-08-21 11:10:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269724004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:25,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731046370] [2021-08-21 11:10:25,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:10:25,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:25,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:25,447 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) [2021-08-21 11:10:25,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 11:10:30,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:10:30,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:30,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:30,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:30,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731046370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:30,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:30,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:30,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863440438] [2021-08-21 11:10:30,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:30,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:30,633 INFO L87 Difference]: Start difference. First operand 5976 states and 16315 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) [2021-08-21 11:10:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:31,271 INFO L93 Difference]: Finished difference Result 8567 states and 22066 transitions. [2021-08-21 11:10:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:10:31,271 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 [2021-08-21 11:10:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:31,282 INFO L225 Difference]: With dead ends: 8567 [2021-08-21 11:10:31,282 INFO L226 Difference]: Without dead ends: 8415 [2021-08-21 11:10:31,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:10:31,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8415 states. [2021-08-21 11:10:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8415 to 5951. [2021-08-21 11:10:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5951 states, 5950 states have (on average 2.7327731092436975) internal successors, (16260), 5950 states have internal predecessors, (16260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5951 states to 5951 states and 16260 transitions. [2021-08-21 11:10:31,392 INFO L78 Accepts]: Start accepts. Automaton has 5951 states and 16260 transitions. Word has length 67 [2021-08-21 11:10:31,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:31,392 INFO L470 AbstractCegarLoop]: Abstraction has 5951 states and 16260 transitions. [2021-08-21 11:10:31,392 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) [2021-08-21 11:10:31,392 INFO L276 IsEmpty]: Start isEmpty. Operand 5951 states and 16260 transitions. [2021-08-21 11:10:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:31,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:31,397 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] [2021-08-21 11:10:31,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:31,612 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,SelfDestructingSolverStorable113 [2021-08-21 11:10:31,613 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash -889204762, now seen corresponding path program 83 times [2021-08-21 11:10:31,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:31,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203282530] [2021-08-21 11:10:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:31,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:31,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:31,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203282530] [2021-08-21 11:10:31,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203282530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:31,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574383664] [2021-08-21 11:10:31,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:10:31,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:31,780 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) [2021-08-21 11:10:31,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 11:10:36,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:10:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:36,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:37,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574383664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:37,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:37,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:37,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062323476] [2021-08-21 11:10:37,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:37,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:37,087 INFO L87 Difference]: Start difference. First operand 5951 states and 16260 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) [2021-08-21 11:10:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:37,769 INFO L93 Difference]: Finished difference Result 8556 states and 22061 transitions. [2021-08-21 11:10:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:10:37,769 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 [2021-08-21 11:10:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:37,781 INFO L225 Difference]: With dead ends: 8556 [2021-08-21 11:10:37,781 INFO L226 Difference]: Without dead ends: 8404 [2021-08-21 11:10:37,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 672.3ms TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:10:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8404 states. [2021-08-21 11:10:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8404 to 5941. [2021-08-21 11:10:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5941 states, 5940 states have (on average 2.7336700336700335) internal successors, (16238), 5940 states have internal predecessors, (16238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5941 states to 5941 states and 16238 transitions. [2021-08-21 11:10:37,860 INFO L78 Accepts]: Start accepts. Automaton has 5941 states and 16238 transitions. Word has length 67 [2021-08-21 11:10:37,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:37,860 INFO L470 AbstractCegarLoop]: Abstraction has 5941 states and 16238 transitions. [2021-08-21 11:10:37,860 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) [2021-08-21 11:10:37,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5941 states and 16238 transitions. [2021-08-21 11:10:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:37,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:37,865 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] [2021-08-21 11:10:37,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:38,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:38,093 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash 946247994, now seen corresponding path program 84 times [2021-08-21 11:10:38,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:38,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534825505] [2021-08-21 11:10:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:38,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:38,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:38,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534825505] [2021-08-21 11:10:38,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534825505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:38,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633309827] [2021-08-21 11:10:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:10:38,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:38,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:38,239 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) [2021-08-21 11:10:38,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 11:10:42,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:10:42,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:43,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633309827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:43,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:43,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:43,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073104782] [2021-08-21 11:10:43,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:43,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:43,549 INFO L87 Difference]: Start difference. First operand 5941 states and 16238 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) [2021-08-21 11:10:44,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:44,231 INFO L93 Difference]: Finished difference Result 8481 states and 21896 transitions. [2021-08-21 11:10:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:10:44,232 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 [2021-08-21 11:10:44,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:44,243 INFO L225 Difference]: With dead ends: 8481 [2021-08-21 11:10:44,243 INFO L226 Difference]: Without dead ends: 8329 [2021-08-21 11:10:44,244 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 691.6ms TimeCoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 11:10:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8329 states. [2021-08-21 11:10:44,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8329 to 5900. [2021-08-21 11:10:44,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5900 states, 5899 states have (on average 2.7365655195795897) internal successors, (16143), 5899 states have internal predecessors, (16143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5900 states to 5900 states and 16143 transitions. [2021-08-21 11:10:44,325 INFO L78 Accepts]: Start accepts. Automaton has 5900 states and 16143 transitions. Word has length 67 [2021-08-21 11:10:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:44,325 INFO L470 AbstractCegarLoop]: Abstraction has 5900 states and 16143 transitions. [2021-08-21 11:10:44,325 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) [2021-08-21 11:10:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5900 states and 16143 transitions. [2021-08-21 11:10:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:44,331 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:44,331 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] [2021-08-21 11:10:44,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:44,549 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,SelfDestructingSolverStorable115 [2021-08-21 11:10:44,549 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -858321184, now seen corresponding path program 85 times [2021-08-21 11:10:44,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:44,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063173465] [2021-08-21 11:10:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:44,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:44,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:44,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063173465] [2021-08-21 11:10:44,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063173465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:44,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743321560] [2021-08-21 11:10:44,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:10:44,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:44,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:44,663 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) [2021-08-21 11:10:44,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 11:10:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:49,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:49,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:49,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743321560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:49,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:49,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:49,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403304842] [2021-08-21 11:10:49,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:49,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:49,992 INFO L87 Difference]: Start difference. First operand 5900 states and 16143 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) [2021-08-21 11:10:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:50,398 INFO L93 Difference]: Finished difference Result 8078 states and 21083 transitions. [2021-08-21 11:10:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:10:50,399 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 [2021-08-21 11:10:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:50,410 INFO L225 Difference]: With dead ends: 8078 [2021-08-21 11:10:50,410 INFO L226 Difference]: Without dead ends: 7926 [2021-08-21 11:10:50,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=441, Invalid=1281, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:10:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-08-21 11:10:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 5905. [2021-08-21 11:10:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5905 states, 5904 states have (on average 2.736111111111111) internal successors, (16154), 5904 states have internal predecessors, (16154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5905 states to 5905 states and 16154 transitions. [2021-08-21 11:10:50,490 INFO L78 Accepts]: Start accepts. Automaton has 5905 states and 16154 transitions. Word has length 67 [2021-08-21 11:10:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:50,490 INFO L470 AbstractCegarLoop]: Abstraction has 5905 states and 16154 transitions. [2021-08-21 11:10:50,490 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) [2021-08-21 11:10:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 5905 states and 16154 transitions. [2021-08-21 11:10:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:50,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:50,496 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] [2021-08-21 11:10:50,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:50,716 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,SelfDestructingSolverStorable116 [2021-08-21 11:10:50,717 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:50,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:50,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1648201170, now seen corresponding path program 86 times [2021-08-21 11:10:50,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:50,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424702740] [2021-08-21 11:10:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:50,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:50,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:50,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424702740] [2021-08-21 11:10:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424702740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:50,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040386653] [2021-08-21 11:10:50,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:10:50,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:50,908 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) [2021-08-21 11:10:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 11:10:55,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:10:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:10:55,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:10:55,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:10:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:56,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040386653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:56,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:10:56,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:10:56,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052458157] [2021-08-21 11:10:56,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:10:56,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:10:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:10:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:10:56,391 INFO L87 Difference]: Start difference. First operand 5905 states and 16154 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) [2021-08-21 11:10:56,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:10:56,901 INFO L93 Difference]: Finished difference Result 8111 states and 21146 transitions. [2021-08-21 11:10:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:10:56,901 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 [2021-08-21 11:10:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:10:56,912 INFO L225 Difference]: With dead ends: 8111 [2021-08-21 11:10:56,913 INFO L226 Difference]: Without dead ends: 7959 [2021-08-21 11:10:56,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:10:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7959 states. [2021-08-21 11:10:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7959 to 5870. [2021-08-21 11:10:56,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5870 states, 5869 states have (on average 2.739308229681377) internal successors, (16077), 5869 states have internal predecessors, (16077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:10:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5870 states to 5870 states and 16077 transitions. [2021-08-21 11:10:56,991 INFO L78 Accepts]: Start accepts. Automaton has 5870 states and 16077 transitions. Word has length 67 [2021-08-21 11:10:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:10:56,992 INFO L470 AbstractCegarLoop]: Abstraction has 5870 states and 16077 transitions. [2021-08-21 11:10:56,992 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) [2021-08-21 11:10:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5870 states and 16077 transitions. [2021-08-21 11:10:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:10:56,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:10:56,997 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] [2021-08-21 11:10:57,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 11:10:57,208 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,SelfDestructingSolverStorable117 [2021-08-21 11:10:57,208 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:10:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:10:57,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1982553662, now seen corresponding path program 87 times [2021-08-21 11:10:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:10:57,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902737784] [2021-08-21 11:10:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:10:57,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:10:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:10:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:10:57,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:10:57,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902737784] [2021-08-21 11:10:57,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902737784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:10:57,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468980327] [2021-08-21 11:10:57,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:10:57,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:10:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:10:57,359 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) [2021-08-21 11:10:57,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 11:11:02,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:11:02,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:02,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:02,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468980327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:02,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:02,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:02,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736943058] [2021-08-21 11:11:02,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:02,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:02,919 INFO L87 Difference]: Start difference. First operand 5870 states and 16077 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) [2021-08-21 11:11:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:03,384 INFO L93 Difference]: Finished difference Result 8052 states and 21021 transitions. [2021-08-21 11:11:03,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 11:11:03,385 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 [2021-08-21 11:11:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:03,395 INFO L225 Difference]: With dead ends: 8052 [2021-08-21 11:11:03,395 INFO L226 Difference]: Without dead ends: 7900 [2021-08-21 11:11:03,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:11:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2021-08-21 11:11:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 5810. [2021-08-21 11:11:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5810 states, 5809 states have (on average 2.744878636598382) internal successors, (15945), 5809 states have internal predecessors, (15945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5810 states to 5810 states and 15945 transitions. [2021-08-21 11:11:03,463 INFO L78 Accepts]: Start accepts. Automaton has 5810 states and 15945 transitions. Word has length 67 [2021-08-21 11:11:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:03,463 INFO L470 AbstractCegarLoop]: Abstraction has 5810 states and 15945 transitions. [2021-08-21 11:11:03,463 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) [2021-08-21 11:11:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5810 states and 15945 transitions. [2021-08-21 11:11:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:03,468 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:03,468 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] [2021-08-21 11:11:03,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:03,684 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,SelfDestructingSolverStorable118 [2021-08-21 11:11:03,685 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1733536500, now seen corresponding path program 88 times [2021-08-21 11:11:03,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:03,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3846234] [2021-08-21 11:11:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:03,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:03,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:03,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3846234] [2021-08-21 11:11:03,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3846234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:03,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905365276] [2021-08-21 11:11:03,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:11:03,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:03,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:03,820 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) [2021-08-21 11:11:03,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 11:11:09,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:11:09,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:09,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:09,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:09,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905365276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:09,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:09,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:09,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322720923] [2021-08-21 11:11:09,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:09,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:09,541 INFO L87 Difference]: Start difference. First operand 5810 states and 15945 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) [2021-08-21 11:11:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:09,975 INFO L93 Difference]: Finished difference Result 8730 states and 22455 transitions. [2021-08-21 11:11:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 11:11:09,976 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 [2021-08-21 11:11:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:09,988 INFO L225 Difference]: With dead ends: 8730 [2021-08-21 11:11:09,988 INFO L226 Difference]: Without dead ends: 8578 [2021-08-21 11:11:09,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=406, Invalid=1076, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 11:11:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-08-21 11:11:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 5860. [2021-08-21 11:11:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5860 states, 5859 states have (on average 2.7402287079706436) internal successors, (16055), 5859 states have internal predecessors, (16055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5860 states to 5860 states and 16055 transitions. [2021-08-21 11:11:10,074 INFO L78 Accepts]: Start accepts. Automaton has 5860 states and 16055 transitions. Word has length 67 [2021-08-21 11:11:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:10,074 INFO L470 AbstractCegarLoop]: Abstraction has 5860 states and 16055 transitions. [2021-08-21 11:11:10,074 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) [2021-08-21 11:11:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states and 16055 transitions. [2021-08-21 11:11:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:10,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:10,080 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] [2021-08-21 11:11:10,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:10,293 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash -207990376, now seen corresponding path program 89 times [2021-08-21 11:11:10,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:10,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51505711] [2021-08-21 11:11:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:10,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:10,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:10,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51505711] [2021-08-21 11:11:10,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51505711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:10,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372461248] [2021-08-21 11:11:10,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:11:10,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:10,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:10,416 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) [2021-08-21 11:11:10,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 11:11:15,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:11:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:15,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:16,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372461248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:16,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:16,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:16,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666921747] [2021-08-21 11:11:16,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:16,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:16,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:16,041 INFO L87 Difference]: Start difference. First operand 5860 states and 16055 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) [2021-08-21 11:11:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:16,616 INFO L93 Difference]: Finished difference Result 8941 states and 22844 transitions. [2021-08-21 11:11:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:11:16,617 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 [2021-08-21 11:11:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:16,629 INFO L225 Difference]: With dead ends: 8941 [2021-08-21 11:11:16,629 INFO L226 Difference]: Without dead ends: 8789 [2021-08-21 11:11:16,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=488, Invalid=1404, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:11:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8789 states. [2021-08-21 11:11:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8789 to 5935. [2021-08-21 11:11:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5935 states, 5934 states have (on average 2.7334007414897203) internal successors, (16220), 5934 states have internal predecessors, (16220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5935 states to 5935 states and 16220 transitions. [2021-08-21 11:11:16,714 INFO L78 Accepts]: Start accepts. Automaton has 5935 states and 16220 transitions. Word has length 67 [2021-08-21 11:11:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:16,714 INFO L470 AbstractCegarLoop]: Abstraction has 5935 states and 16220 transitions. [2021-08-21 11:11:16,714 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) [2021-08-21 11:11:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 5935 states and 16220 transitions. [2021-08-21 11:11:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:16,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:16,719 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] [2021-08-21 11:11:16,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:16,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:16,945 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash -583690870, now seen corresponding path program 90 times [2021-08-21 11:11:16,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:16,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222401416] [2021-08-21 11:11:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:16,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:17,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:17,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222401416] [2021-08-21 11:11:17,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222401416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:17,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466763954] [2021-08-21 11:11:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:11:17,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:17,079 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) [2021-08-21 11:11:17,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 11:11:21,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:11:21,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:21,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:21,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:22,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466763954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:22,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:22,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:22,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935602296] [2021-08-21 11:11:22,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:22,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:22,481 INFO L87 Difference]: Start difference. First operand 5935 states and 16220 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) [2021-08-21 11:11:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:23,046 INFO L93 Difference]: Finished difference Result 8956 states and 22877 transitions. [2021-08-21 11:11:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 11:11:23,046 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 [2021-08-21 11:11:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:23,059 INFO L225 Difference]: With dead ends: 8956 [2021-08-21 11:11:23,059 INFO L226 Difference]: Without dead ends: 8804 [2021-08-21 11:11:23,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:11:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8804 states. [2021-08-21 11:11:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8804 to 5935. [2021-08-21 11:11:23,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5935 states, 5934 states have (on average 2.7334007414897203) internal successors, (16220), 5934 states have internal predecessors, (16220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:23,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5935 states to 5935 states and 16220 transitions. [2021-08-21 11:11:23,141 INFO L78 Accepts]: Start accepts. Automaton has 5935 states and 16220 transitions. Word has length 67 [2021-08-21 11:11:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:23,142 INFO L470 AbstractCegarLoop]: Abstraction has 5935 states and 16220 transitions. [2021-08-21 11:11:23,142 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) [2021-08-21 11:11:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5935 states and 16220 transitions. [2021-08-21 11:11:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:23,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:23,148 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] [2021-08-21 11:11:23,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:23,349 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:23,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2073407618, now seen corresponding path program 91 times [2021-08-21 11:11:23,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:23,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927929229] [2021-08-21 11:11:23,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:23,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:23,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:23,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927929229] [2021-08-21 11:11:23,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927929229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:23,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891598361] [2021-08-21 11:11:23,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:11:23,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:23,472 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) [2021-08-21 11:11:23,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 11:11:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:28,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:28,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:29,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891598361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:29,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:29,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:29,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418765352] [2021-08-21 11:11:29,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:29,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:29,176 INFO L87 Difference]: Start difference. First operand 5935 states and 16220 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) [2021-08-21 11:11:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:29,613 INFO L93 Difference]: Finished difference Result 8875 states and 22742 transitions. [2021-08-21 11:11:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 11:11:29,613 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 [2021-08-21 11:11:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:29,626 INFO L225 Difference]: With dead ends: 8875 [2021-08-21 11:11:29,626 INFO L226 Difference]: Without dead ends: 8723 [2021-08-21 11:11:29,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 11:11:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8723 states. [2021-08-21 11:11:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8723 to 5910. [2021-08-21 11:11:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5910 states, 5909 states have (on average 2.73565747165341) internal successors, (16165), 5909 states have internal predecessors, (16165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5910 states to 5910 states and 16165 transitions. [2021-08-21 11:11:29,708 INFO L78 Accepts]: Start accepts. Automaton has 5910 states and 16165 transitions. Word has length 67 [2021-08-21 11:11:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:29,708 INFO L470 AbstractCegarLoop]: Abstraction has 5910 states and 16165 transitions. [2021-08-21 11:11:29,708 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) [2021-08-21 11:11:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 5910 states and 16165 transitions. [2021-08-21 11:11:29,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:29,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:29,714 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] [2021-08-21 11:11:29,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:29,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 11:11:29,937 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1492143244, now seen corresponding path program 92 times [2021-08-21 11:11:29,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:29,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759025497] [2021-08-21 11:11:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:29,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:30,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:30,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759025497] [2021-08-21 11:11:30,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759025497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:30,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847048111] [2021-08-21 11:11:30,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:11:30,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:30,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:30,039 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) [2021-08-21 11:11:30,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 11:11:35,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:11:35,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847048111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:35,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:35,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:35,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042834722] [2021-08-21 11:11:35,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:35,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:35,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:35,915 INFO L87 Difference]: Start difference. First operand 5910 states and 16165 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) [2021-08-21 11:11:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:36,538 INFO L93 Difference]: Finished difference Result 9047 states and 23026 transitions. [2021-08-21 11:11:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 11:11:36,539 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 [2021-08-21 11:11:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:36,551 INFO L225 Difference]: With dead ends: 9047 [2021-08-21 11:11:36,551 INFO L226 Difference]: Without dead ends: 8895 [2021-08-21 11:11:36,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 11:11:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8895 states. [2021-08-21 11:11:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8895 to 5985. [2021-08-21 11:11:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5985 states, 5984 states have (on average 2.7289438502673797) internal successors, (16330), 5984 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5985 states to 5985 states and 16330 transitions. [2021-08-21 11:11:36,658 INFO L78 Accepts]: Start accepts. Automaton has 5985 states and 16330 transitions. Word has length 67 [2021-08-21 11:11:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:36,658 INFO L470 AbstractCegarLoop]: Abstraction has 5985 states and 16330 transitions. [2021-08-21 11:11:36,658 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) [2021-08-21 11:11:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5985 states and 16330 transitions. [2021-08-21 11:11:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:36,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:36,663 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] [2021-08-21 11:11:36,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:36,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 11:11:36,889 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1116442750, now seen corresponding path program 93 times [2021-08-21 11:11:36,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:36,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513718992] [2021-08-21 11:11:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:36,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:37,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:37,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513718992] [2021-08-21 11:11:37,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513718992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:37,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458304341] [2021-08-21 11:11:37,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:11:37,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:37,020 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) [2021-08-21 11:11:37,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 11:11:41,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:11:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:41,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:42,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458304341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:42,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:42,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:42,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534597096] [2021-08-21 11:11:42,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:42,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:42,509 INFO L87 Difference]: Start difference. First operand 5985 states and 16330 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) [2021-08-21 11:11:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:43,131 INFO L93 Difference]: Finished difference Result 8986 states and 22919 transitions. [2021-08-21 11:11:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:11:43,132 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 [2021-08-21 11:11:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:43,144 INFO L225 Difference]: With dead ends: 8986 [2021-08-21 11:11:43,144 INFO L226 Difference]: Without dead ends: 8834 [2021-08-21 11:11:43,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=582, Invalid=1674, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:11:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8834 states. [2021-08-21 11:11:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8834 to 6035. [2021-08-21 11:11:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.724560822008618) internal successors, (16440), 6034 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 16440 transitions. [2021-08-21 11:11:43,224 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 16440 transitions. Word has length 67 [2021-08-21 11:11:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:43,225 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 16440 transitions. [2021-08-21 11:11:43,225 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) [2021-08-21 11:11:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 16440 transitions. [2021-08-21 11:11:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:43,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:43,231 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, 1, 1, 1, 1, 1] [2021-08-21 11:11:43,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:43,440 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,SelfDestructingSolverStorable124 [2021-08-21 11:11:43,441 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1527274372, now seen corresponding path program 23 times [2021-08-21 11:11:43,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:43,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865231709] [2021-08-21 11:11:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:43,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:43,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:43,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865231709] [2021-08-21 11:11:43,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865231709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:43,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430191421] [2021-08-21 11:11:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:11:43,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:43,566 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) [2021-08-21 11:11:43,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 11:11:48,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 11:11:48,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:48,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:48,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430191421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:48,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:48,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:11:48,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43339556] [2021-08-21 11:11:48,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:11:48,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:48,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:11:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:11:48,958 INFO L87 Difference]: Start difference. First operand 6035 states and 16440 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:49,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:49,462 INFO L93 Difference]: Finished difference Result 8903 states and 22810 transitions. [2021-08-21 11:11:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:11:49,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:11:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:49,474 INFO L225 Difference]: With dead ends: 8903 [2021-08-21 11:11:49,474 INFO L226 Difference]: Without dead ends: 8599 [2021-08-21 11:11:49,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 11:11:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8599 states. [2021-08-21 11:11:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8599 to 6035. [2021-08-21 11:11:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.724560822008618) internal successors, (16440), 6034 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 16440 transitions. [2021-08-21 11:11:49,559 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 16440 transitions. Word has length 67 [2021-08-21 11:11:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:49,559 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 16440 transitions. [2021-08-21 11:11:49,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 16440 transitions. [2021-08-21 11:11:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:49,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:49,565 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] [2021-08-21 11:11:49,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:49,792 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,SelfDestructingSolverStorable125 [2021-08-21 11:11:49,793 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 873533030, now seen corresponding path program 94 times [2021-08-21 11:11:49,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:49,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734166013] [2021-08-21 11:11:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:49,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:49,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:49,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734166013] [2021-08-21 11:11:49,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734166013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:49,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438862432] [2021-08-21 11:11:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:11:49,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:49,950 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) [2021-08-21 11:11:49,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 11:11:55,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:11:55,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:11:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:11:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:11:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:55,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438862432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:55,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:11:55,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:11:55,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133893430] [2021-08-21 11:11:55,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:11:55,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:11:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:11:55,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:11:55,902 INFO L87 Difference]: Start difference. First operand 6035 states and 16440 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) [2021-08-21 11:11:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:11:56,515 INFO L93 Difference]: Finished difference Result 8772 states and 22501 transitions. [2021-08-21 11:11:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:11:56,516 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 [2021-08-21 11:11:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:11:56,527 INFO L225 Difference]: With dead ends: 8772 [2021-08-21 11:11:56,527 INFO L226 Difference]: Without dead ends: 8620 [2021-08-21 11:11:56,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=508, Invalid=1562, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:11:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8620 states. [2021-08-21 11:11:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8620 to 6035. [2021-08-21 11:11:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.724560822008618) internal successors, (16440), 6034 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:11:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 16440 transitions. [2021-08-21 11:11:56,602 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 16440 transitions. Word has length 67 [2021-08-21 11:11:56,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:11:56,602 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 16440 transitions. [2021-08-21 11:11:56,602 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) [2021-08-21 11:11:56,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 16440 transitions. [2021-08-21 11:11:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:11:56,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:11:56,607 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] [2021-08-21 11:11:56,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 11:11:56,820 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,SelfDestructingSolverStorable126 [2021-08-21 11:11:56,821 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:11:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:11:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 497832536, now seen corresponding path program 95 times [2021-08-21 11:11:56,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:11:56,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135054947] [2021-08-21 11:11:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:11:56,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:11:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:11:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:11:57,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:11:57,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135054947] [2021-08-21 11:11:57,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135054947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:11:57,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561225644] [2021-08-21 11:11:57,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:11:57,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:11:57,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:11:57,027 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) [2021-08-21 11:11:57,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 11:12:02,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:12:02,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:03,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561225644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:03,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:03,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:03,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786161490] [2021-08-21 11:12:03,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:03,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:03,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:03,025 INFO L87 Difference]: Start difference. First operand 6035 states and 16440 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) [2021-08-21 11:12:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:03,750 INFO L93 Difference]: Finished difference Result 8816 states and 22569 transitions. [2021-08-21 11:12:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 11:12:03,751 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 [2021-08-21 11:12:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:03,763 INFO L225 Difference]: With dead ends: 8816 [2021-08-21 11:12:03,763 INFO L226 Difference]: Without dead ends: 8664 [2021-08-21 11:12:03,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 707.5ms TimeCoverageRelationStatistics Valid=600, Invalid=1850, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:12:03,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2021-08-21 11:12:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 6035. [2021-08-21 11:12:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.724560822008618) internal successors, (16440), 6034 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 16440 transitions. [2021-08-21 11:12:03,841 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 16440 transitions. Word has length 67 [2021-08-21 11:12:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:03,841 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 16440 transitions. [2021-08-21 11:12:03,841 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) [2021-08-21 11:12:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 16440 transitions. [2021-08-21 11:12:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:03,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:03,846 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] [2021-08-21 11:12:03,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-21 11:12:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:04,069 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1257748036, now seen corresponding path program 96 times [2021-08-21 11:12:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:04,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102405753] [2021-08-21 11:12:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:04,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:04,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:04,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102405753] [2021-08-21 11:12:04,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102405753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:04,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233672076] [2021-08-21 11:12:04,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:12:04,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:04,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:04,202 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:04,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 11:12:09,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 11:12:09,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:10,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233672076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:10,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:10,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:10,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446291254] [2021-08-21 11:12:10,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:10,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:10,256 INFO L87 Difference]: Start difference. First operand 6035 states and 16440 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) [2021-08-21 11:12:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:10,785 INFO L93 Difference]: Finished difference Result 8577 states and 22096 transitions. [2021-08-21 11:12:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:12:10,785 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 [2021-08-21 11:12:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:10,796 INFO L225 Difference]: With dead ends: 8577 [2021-08-21 11:12:10,796 INFO L226 Difference]: Without dead ends: 8425 [2021-08-21 11:12:10,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:12:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8425 states. [2021-08-21 11:12:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8425 to 5935. [2021-08-21 11:12:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5935 states, 5934 states have (on average 2.7334007414897203) internal successors, (16220), 5934 states have internal predecessors, (16220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5935 states to 5935 states and 16220 transitions. [2021-08-21 11:12:10,912 INFO L78 Accepts]: Start accepts. Automaton has 5935 states and 16220 transitions. Word has length 67 [2021-08-21 11:12:10,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:10,912 INFO L470 AbstractCegarLoop]: Abstraction has 5935 states and 16220 transitions. [2021-08-21 11:12:10,913 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) [2021-08-21 11:12:10,913 INFO L276 IsEmpty]: Start isEmpty. Operand 5935 states and 16220 transitions. [2021-08-21 11:12:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:10,917 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:10,918 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] [2021-08-21 11:12:10,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:11,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:11,145 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1661305408, now seen corresponding path program 97 times [2021-08-21 11:12:11,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:11,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952369908] [2021-08-21 11:12:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:11,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:11,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:11,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952369908] [2021-08-21 11:12:11,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952369908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:11,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575458314] [2021-08-21 11:12:11,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:12:11,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:11,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:11,276 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:11,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 11:12:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:17,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575458314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:17,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:17,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:17,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454713102] [2021-08-21 11:12:17,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:17,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:17,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:17,403 INFO L87 Difference]: Start difference. First operand 5935 states and 16220 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) [2021-08-21 11:12:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:17,846 INFO L93 Difference]: Finished difference Result 8880 states and 22735 transitions. [2021-08-21 11:12:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 11:12:17,847 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 [2021-08-21 11:12:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:17,858 INFO L225 Difference]: With dead ends: 8880 [2021-08-21 11:12:17,858 INFO L226 Difference]: Without dead ends: 8728 [2021-08-21 11:12:17,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=415, Invalid=1145, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 11:12:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8728 states. [2021-08-21 11:12:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8728 to 5960. [2021-08-21 11:12:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 2.731162946803155) internal successors, (16275), 5959 states have internal predecessors, (16275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 16275 transitions. [2021-08-21 11:12:17,933 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 16275 transitions. Word has length 67 [2021-08-21 11:12:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:17,933 INFO L470 AbstractCegarLoop]: Abstraction has 5960 states and 16275 transitions. [2021-08-21 11:12:17,933 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) [2021-08-21 11:12:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 16275 transitions. [2021-08-21 11:12:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:17,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:17,938 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] [2021-08-21 11:12:17,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:18,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 11:12:18,154 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -135759284, now seen corresponding path program 98 times [2021-08-21 11:12:18,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:18,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704388809] [2021-08-21 11:12:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:18,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:18,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:18,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704388809] [2021-08-21 11:12:18,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704388809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:18,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888141263] [2021-08-21 11:12:18,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:12:18,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:18,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:18,365 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:18,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 11:12:24,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:12:24,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:24,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:24,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:24,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888141263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:24,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:24,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:24,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464770923] [2021-08-21 11:12:24,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:24,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:24,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:24,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:24,567 INFO L87 Difference]: Start difference. First operand 5960 states and 16275 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) [2021-08-21 11:12:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:25,171 INFO L93 Difference]: Finished difference Result 9081 states and 23134 transitions. [2021-08-21 11:12:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 11:12:25,171 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 [2021-08-21 11:12:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:25,181 INFO L225 Difference]: With dead ends: 9081 [2021-08-21 11:12:25,181 INFO L226 Difference]: Without dead ends: 8929 [2021-08-21 11:12:25,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 561.6ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 11:12:25,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8929 states. [2021-08-21 11:12:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8929 to 6035. [2021-08-21 11:12:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.724560822008618) internal successors, (16440), 6034 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 16440 transitions. [2021-08-21 11:12:25,251 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 16440 transitions. Word has length 67 [2021-08-21 11:12:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:25,251 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 16440 transitions. [2021-08-21 11:12:25,251 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) [2021-08-21 11:12:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 16440 transitions. [2021-08-21 11:12:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:25,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:25,256 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] [2021-08-21 11:12:25,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:25,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:25,473 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -511459778, now seen corresponding path program 99 times [2021-08-21 11:12:25,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:25,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558258632] [2021-08-21 11:12:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:25,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:25,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:25,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558258632] [2021-08-21 11:12:25,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558258632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:25,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885512767] [2021-08-21 11:12:25,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:12:25,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:25,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:25,603 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:25,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 11:12:31,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:12:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:31,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885512767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:31,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:31,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:31,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123788118] [2021-08-21 11:12:31,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:31,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:31,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:31,930 INFO L87 Difference]: Start difference. First operand 6035 states and 16440 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) [2021-08-21 11:12:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:32,589 INFO L93 Difference]: Finished difference Result 9051 states and 23052 transitions. [2021-08-21 11:12:32,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:12:32,589 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 [2021-08-21 11:12:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:32,601 INFO L225 Difference]: With dead ends: 9051 [2021-08-21 11:12:32,601 INFO L226 Difference]: Without dead ends: 8899 [2021-08-21 11:12:32,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 11:12:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8899 states. [2021-08-21 11:12:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8899 to 6035. [2021-08-21 11:12:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 6034 states have (on average 2.724560822008618) internal successors, (16440), 6034 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 16440 transitions. [2021-08-21 11:12:32,678 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 16440 transitions. Word has length 67 [2021-08-21 11:12:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:32,678 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 16440 transitions. [2021-08-21 11:12:32,678 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) [2021-08-21 11:12:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 16440 transitions. [2021-08-21 11:12:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:32,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:32,683 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] [2021-08-21 11:12:32,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:32,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:32,913 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2001176526, now seen corresponding path program 100 times [2021-08-21 11:12:32,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:32,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032759924] [2021-08-21 11:12:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:32,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:33,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:33,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032759924] [2021-08-21 11:12:33,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032759924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:33,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369850988] [2021-08-21 11:12:33,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:12:33,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:33,043 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:33,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 11:12:38,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:12:38,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:38,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:39,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369850988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:39,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:39,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:39,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873104035] [2021-08-21 11:12:39,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:39,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:39,335 INFO L87 Difference]: Start difference. First operand 6035 states and 16440 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) [2021-08-21 11:12:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:39,897 INFO L93 Difference]: Finished difference Result 9090 states and 23157 transitions. [2021-08-21 11:12:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:12:39,898 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 [2021-08-21 11:12:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:39,910 INFO L225 Difference]: With dead ends: 9090 [2021-08-21 11:12:39,910 INFO L226 Difference]: Without dead ends: 8938 [2021-08-21 11:12:39,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 11:12:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8938 states. [2021-08-21 11:12:39,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8938 to 6010. [2021-08-21 11:12:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 2.726743218505575) internal successors, (16385), 6009 states have internal predecessors, (16385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 16385 transitions. [2021-08-21 11:12:39,990 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 16385 transitions. Word has length 67 [2021-08-21 11:12:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 16385 transitions. [2021-08-21 11:12:39,991 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) [2021-08-21 11:12:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 16385 transitions. [2021-08-21 11:12:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:39,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:39,996 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] [2021-08-21 11:12:40,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:40,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:40,221 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1971669876, now seen corresponding path program 101 times [2021-08-21 11:12:40,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:40,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956415757] [2021-08-21 11:12:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:40,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:40,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:40,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956415757] [2021-08-21 11:12:40,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956415757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:40,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870976495] [2021-08-21 11:12:40,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:12:40,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:40,349 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:40,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 11:12:46,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:12:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:46,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870976495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:46,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:46,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:46,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556856461] [2021-08-21 11:12:46,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:46,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:46,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:46,840 INFO L87 Difference]: Start difference. First operand 6010 states and 16385 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) [2021-08-21 11:12:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:47,342 INFO L93 Difference]: Finished difference Result 8865 states and 22710 transitions. [2021-08-21 11:12:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 11:12:47,342 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 [2021-08-21 11:12:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:47,354 INFO L225 Difference]: With dead ends: 8865 [2021-08-21 11:12:47,354 INFO L226 Difference]: Without dead ends: 8713 [2021-08-21 11:12:47,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=428, Invalid=1212, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 11:12:47,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8713 states. [2021-08-21 11:12:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8713 to 6010. [2021-08-21 11:12:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 6009 states have (on average 2.726743218505575) internal successors, (16385), 6009 states have internal predecessors, (16385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 16385 transitions. [2021-08-21 11:12:47,432 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 16385 transitions. Word has length 67 [2021-08-21 11:12:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:47,432 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 16385 transitions. [2021-08-21 11:12:47,433 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) [2021-08-21 11:12:47,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 16385 transitions. [2021-08-21 11:12:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:47,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:47,438 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] [2021-08-21 11:12:47,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:47,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:47,653 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1323792514, now seen corresponding path program 102 times [2021-08-21 11:12:47,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:47,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840071988] [2021-08-21 11:12:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:47,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:47,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840071988] [2021-08-21 11:12:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840071988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501516616] [2021-08-21 11:12:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:12:47,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:47,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:47,776 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:47,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 11:12:53,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:12:53,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:12:53,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:12:53,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:12:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:53,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501516616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:53,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:12:53,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:12:53,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564746010] [2021-08-21 11:12:53,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:12:53,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:12:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:12:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:12:53,887 INFO L87 Difference]: Start difference. First operand 6010 states and 16385 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) [2021-08-21 11:12:54,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:12:54,531 INFO L93 Difference]: Finished difference Result 10831 states and 27786 transitions. [2021-08-21 11:12:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 11:12:54,532 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 [2021-08-21 11:12:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:12:54,546 INFO L225 Difference]: With dead ends: 10831 [2021-08-21 11:12:54,547 INFO L226 Difference]: Without dead ends: 10679 [2021-08-21 11:12:54,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 11:12:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10679 states. [2021-08-21 11:12:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10679 to 6150. [2021-08-21 11:12:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 6149 states have (on average 2.736217271100992) internal successors, (16825), 6149 states have internal predecessors, (16825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:12:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 16825 transitions. [2021-08-21 11:12:54,644 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 16825 transitions. Word has length 67 [2021-08-21 11:12:54,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:12:54,644 INFO L470 AbstractCegarLoop]: Abstraction has 6150 states and 16825 transitions. [2021-08-21 11:12:54,644 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) [2021-08-21 11:12:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 16825 transitions. [2021-08-21 11:12:54,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:12:54,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:12:54,650 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] [2021-08-21 11:12:54,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 11:12:54,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 11:12:54,865 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:12:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:12:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1845120964, now seen corresponding path program 103 times [2021-08-21 11:12:54,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:12:54,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59583995] [2021-08-21 11:12:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:12:54,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:12:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:12:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:12:54,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:12:54,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59583995] [2021-08-21 11:12:54,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59583995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:12:54,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650468082] [2021-08-21 11:12:54,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:12:54,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:12:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:12:54,996 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:12:54,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 11:13:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:01,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650468082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:01,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:01,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:01,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319133293] [2021-08-21 11:13:01,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:01,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:01,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:01,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:01,259 INFO L87 Difference]: Start difference. First operand 6150 states and 16825 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) [2021-08-21 11:13:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:01,921 INFO L93 Difference]: Finished difference Result 11351 states and 29928 transitions. [2021-08-21 11:13:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:13:01,921 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 [2021-08-21 11:13:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:01,937 INFO L225 Difference]: With dead ends: 11351 [2021-08-21 11:13:01,937 INFO L226 Difference]: Without dead ends: 11199 [2021-08-21 11:13:01,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=587, Invalid=1765, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:13:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11199 states. [2021-08-21 11:13:02,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11199 to 6270. [2021-08-21 11:13:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6270 states, 6269 states have (on average 2.7436592758015634) internal successors, (17200), 6269 states have internal predecessors, (17200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6270 states to 6270 states and 17200 transitions. [2021-08-21 11:13:02,103 INFO L78 Accepts]: Start accepts. Automaton has 6270 states and 17200 transitions. Word has length 67 [2021-08-21 11:13:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:02,104 INFO L470 AbstractCegarLoop]: Abstraction has 6270 states and 17200 transitions. [2021-08-21 11:13:02,104 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) [2021-08-21 11:13:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6270 states and 17200 transitions. [2021-08-21 11:13:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:02,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:02,109 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] [2021-08-21 11:13:02,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:02,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 11:13:02,324 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1790273592, now seen corresponding path program 104 times [2021-08-21 11:13:02,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:02,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464764629] [2021-08-21 11:13:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:02,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:02,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:02,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464764629] [2021-08-21 11:13:02,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464764629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:02,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807355722] [2021-08-21 11:13:02,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:13:02,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:02,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:02,444 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:02,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 11:13:08,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:13:08,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:08,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:08,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807355722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:08,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:08,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:08,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586508742] [2021-08-21 11:13:08,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:08,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:08,512 INFO L87 Difference]: Start difference. First operand 6270 states and 17200 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:09,489 INFO L93 Difference]: Finished difference Result 13596 states and 36190 transitions. [2021-08-21 11:13:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 11:13:09,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:13:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:09,511 INFO L225 Difference]: With dead ends: 13596 [2021-08-21 11:13:09,511 INFO L226 Difference]: Without dead ends: 13214 [2021-08-21 11:13:09,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 858.0ms TimeCoverageRelationStatistics Valid=864, Invalid=2676, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 11:13:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13214 states. [2021-08-21 11:13:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13214 to 6210. [2021-08-21 11:13:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6210 states, 6209 states have (on average 2.7532613947495572) internal successors, (17095), 6209 states have internal predecessors, (17095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6210 states to 6210 states and 17095 transitions. [2021-08-21 11:13:09,633 INFO L78 Accepts]: Start accepts. Automaton has 6210 states and 17095 transitions. Word has length 67 [2021-08-21 11:13:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:09,633 INFO L470 AbstractCegarLoop]: Abstraction has 6210 states and 17095 transitions. [2021-08-21 11:13:09,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 6210 states and 17095 transitions. [2021-08-21 11:13:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:09,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:09,639 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] [2021-08-21 11:13:09,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:09,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 11:13:09,842 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1645391514, now seen corresponding path program 105 times [2021-08-21 11:13:09,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:09,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892521206] [2021-08-21 11:13:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:09,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:10,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:10,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892521206] [2021-08-21 11:13:10,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892521206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:10,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317334219] [2021-08-21 11:13:10,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:13:10,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:10,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:10,080 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:10,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 11:13:16,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:13:16,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:16,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:16,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:16,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317334219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:16,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:16,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:16,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368782938] [2021-08-21 11:13:16,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:16,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:16,605 INFO L87 Difference]: Start difference. First operand 6210 states and 17095 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) [2021-08-21 11:13:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:17,361 INFO L93 Difference]: Finished difference Result 10902 states and 27903 transitions. [2021-08-21 11:13:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 11:13:17,362 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 [2021-08-21 11:13:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:17,378 INFO L225 Difference]: With dead ends: 10902 [2021-08-21 11:13:17,378 INFO L226 Difference]: Without dead ends: 10750 [2021-08-21 11:13:17,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 695.6ms TimeCoverageRelationStatistics Valid=562, Invalid=1888, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 11:13:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10750 states. [2021-08-21 11:13:17,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10750 to 6335. [2021-08-21 11:13:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6335 states, 6334 states have (on average 2.7707609725292075) internal successors, (17550), 6334 states have internal predecessors, (17550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 17550 transitions. [2021-08-21 11:13:17,476 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 17550 transitions. Word has length 67 [2021-08-21 11:13:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:17,476 INFO L470 AbstractCegarLoop]: Abstraction has 6335 states and 17550 transitions. [2021-08-21 11:13:17,477 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) [2021-08-21 11:13:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 17550 transitions. [2021-08-21 11:13:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:17,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:17,482 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] [2021-08-21 11:13:17,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:17,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:17,703 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1269691020, now seen corresponding path program 106 times [2021-08-21 11:13:17,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:17,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267493209] [2021-08-21 11:13:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:17,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:17,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:17,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267493209] [2021-08-21 11:13:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267493209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:17,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348126995] [2021-08-21 11:13:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:13:17,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:17,837 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:17,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 11:13:24,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:13:24,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:24,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348126995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:24,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:24,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:24,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159927180] [2021-08-21 11:13:24,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:24,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:24,560 INFO L87 Difference]: Start difference. First operand 6335 states and 17550 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) [2021-08-21 11:13:25,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:25,356 INFO L93 Difference]: Finished difference Result 10803 states and 27663 transitions. [2021-08-21 11:13:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 11:13:25,356 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 [2021-08-21 11:13:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:25,372 INFO L225 Difference]: With dead ends: 10803 [2021-08-21 11:13:25,372 INFO L226 Difference]: Without dead ends: 10651 [2021-08-21 11:13:25,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 752.1ms TimeCoverageRelationStatistics Valid=630, Invalid=2022, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 11:13:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-08-21 11:13:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 6500. [2021-08-21 11:13:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 2.776581012463456) internal successors, (18045), 6499 states have internal predecessors, (18045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 18045 transitions. [2021-08-21 11:13:25,476 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 18045 transitions. Word has length 67 [2021-08-21 11:13:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:25,476 INFO L470 AbstractCegarLoop]: Abstraction has 6500 states and 18045 transitions. [2021-08-21 11:13:25,476 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) [2021-08-21 11:13:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 18045 transitions. [2021-08-21 11:13:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:25,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:25,483 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] [2021-08-21 11:13:25,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:25,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-21 11:13:25,697 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:25,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:25,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1276502926, now seen corresponding path program 107 times [2021-08-21 11:13:25,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:25,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201145187] [2021-08-21 11:13:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:25,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:25,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:25,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201145187] [2021-08-21 11:13:25,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201145187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:25,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510246072] [2021-08-21 11:13:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:13:25,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:25,913 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:25,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 11:13:32,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:13:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:32,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510246072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:32,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:32,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:32,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048296545] [2021-08-21 11:13:32,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:32,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:32,566 INFO L87 Difference]: Start difference. First operand 6500 states and 18045 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) [2021-08-21 11:13:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:33,525 INFO L93 Difference]: Finished difference Result 11271 states and 29241 transitions. [2021-08-21 11:13:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 11:13:33,525 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 [2021-08-21 11:13:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:33,541 INFO L225 Difference]: With dead ends: 11271 [2021-08-21 11:13:33,541 INFO L226 Difference]: Without dead ends: 11119 [2021-08-21 11:13:33,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:13:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-08-21 11:13:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 6575. [2021-08-21 11:13:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6575 states, 6574 states have (on average 2.783693337389717) internal successors, (18300), 6574 states have internal predecessors, (18300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6575 states to 6575 states and 18300 transitions. [2021-08-21 11:13:33,640 INFO L78 Accepts]: Start accepts. Automaton has 6575 states and 18300 transitions. Word has length 67 [2021-08-21 11:13:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 6575 states and 18300 transitions. [2021-08-21 11:13:33,640 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) [2021-08-21 11:13:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 6575 states and 18300 transitions. [2021-08-21 11:13:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:33,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:33,646 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] [2021-08-21 11:13:33,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:33,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-21 11:13:33,869 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:33,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1892410552, now seen corresponding path program 108 times [2021-08-21 11:13:33,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:33,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583133854] [2021-08-21 11:13:33,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:33,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:34,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:34,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583133854] [2021-08-21 11:13:34,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583133854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:34,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088919042] [2021-08-21 11:13:34,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:13:34,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:34,007 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:34,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 11:13:40,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:13:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:40,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:40,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088919042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:40,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:40,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:40,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136116960] [2021-08-21 11:13:40,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:40,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:40,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:40,695 INFO L87 Difference]: Start difference. First operand 6575 states and 18300 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) [2021-08-21 11:13:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:41,569 INFO L93 Difference]: Finished difference Result 12190 states and 32312 transitions. [2021-08-21 11:13:41,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 11:13:41,570 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 [2021-08-21 11:13:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:41,587 INFO L225 Difference]: With dead ends: 12190 [2021-08-21 11:13:41,587 INFO L226 Difference]: Without dead ends: 12038 [2021-08-21 11:13:41,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=704, Invalid=2266, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 11:13:41,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12038 states. [2021-08-21 11:13:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12038 to 6695. [2021-08-21 11:13:41,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 2.789811771735883) internal successors, (18675), 6694 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 18675 transitions. [2021-08-21 11:13:41,692 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 18675 transitions. Word has length 67 [2021-08-21 11:13:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:41,692 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 18675 transitions. [2021-08-21 11:13:41,692 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) [2021-08-21 11:13:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 18675 transitions. [2021-08-21 11:13:41,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:41,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:41,698 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] [2021-08-21 11:13:41,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:41,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:41,925 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1742984004, now seen corresponding path program 109 times [2021-08-21 11:13:41,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:41,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852476162] [2021-08-21 11:13:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:41,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:42,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:42,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852476162] [2021-08-21 11:13:42,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852476162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:42,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089716626] [2021-08-21 11:13:42,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:13:42,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:42,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:42,058 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:42,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-21 11:13:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:48,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:48,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089716626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:48,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:48,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:13:48,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817072496] [2021-08-21 11:13:48,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:13:48,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:13:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:13:48,877 INFO L87 Difference]: Start difference. First operand 6695 states and 18675 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:50,014 INFO L93 Difference]: Finished difference Result 14030 states and 37571 transitions. [2021-08-21 11:13:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:13:50,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:13:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:50,035 INFO L225 Difference]: With dead ends: 14030 [2021-08-21 11:13:50,035 INFO L226 Difference]: Without dead ends: 13648 [2021-08-21 11:13:50,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=913, Invalid=2993, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 11:13:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13648 states. [2021-08-21 11:13:50,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13648 to 6500. [2021-08-21 11:13:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6500 states, 6499 states have (on average 2.776581012463456) internal successors, (18045), 6499 states have internal predecessors, (18045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 18045 transitions. [2021-08-21 11:13:50,149 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 18045 transitions. Word has length 67 [2021-08-21 11:13:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:50,150 INFO L470 AbstractCegarLoop]: Abstraction has 6500 states and 18045 transitions. [2021-08-21 11:13:50,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 18045 transitions. [2021-08-21 11:13:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:50,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:50,155 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] [2021-08-21 11:13:50,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-21 11:13:50,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:50,381 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1164370170, now seen corresponding path program 110 times [2021-08-21 11:13:50,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:50,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275251895] [2021-08-21 11:13:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:50,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:50,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:50,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275251895] [2021-08-21 11:13:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275251895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:50,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545502172] [2021-08-21 11:13:50,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:13:50,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:50,514 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:50,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-21 11:13:56,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:13:56,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:13:56,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:13:56,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:13:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:57,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545502172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:57,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:13:57,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:13:57,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239611238] [2021-08-21 11:13:57,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:13:57,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:13:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:13:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:13:57,340 INFO L87 Difference]: Start difference. First operand 6500 states and 18045 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) [2021-08-21 11:13:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:13:58,305 INFO L93 Difference]: Finished difference Result 12486 states and 33283 transitions. [2021-08-21 11:13:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 11:13:58,305 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 [2021-08-21 11:13:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:13:58,323 INFO L225 Difference]: With dead ends: 12486 [2021-08-21 11:13:58,323 INFO L226 Difference]: Without dead ends: 12334 [2021-08-21 11:13:58,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 906.9ms TimeCoverageRelationStatistics Valid=750, Invalid=2330, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 11:13:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12334 states. [2021-08-21 11:13:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12334 to 6740. [2021-08-21 11:13:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6740 states, 6739 states have (on average 2.7889894643122126) internal successors, (18795), 6739 states have internal predecessors, (18795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:13:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6740 states to 6740 states and 18795 transitions. [2021-08-21 11:13:58,438 INFO L78 Accepts]: Start accepts. Automaton has 6740 states and 18795 transitions. Word has length 67 [2021-08-21 11:13:58,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:13:58,438 INFO L470 AbstractCegarLoop]: Abstraction has 6740 states and 18795 transitions. [2021-08-21 11:13:58,439 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) [2021-08-21 11:13:58,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6740 states and 18795 transitions. [2021-08-21 11:13:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:13:58,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:13:58,445 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] [2021-08-21 11:13:58,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-21 11:13:58,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:58,649 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:13:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:13:58,650 INFO L82 PathProgramCache]: Analyzing trace with hash -504797430, now seen corresponding path program 111 times [2021-08-21 11:13:58,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:13:58,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102000052] [2021-08-21 11:13:58,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:13:58,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:13:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:13:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:13:58,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:13:58,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102000052] [2021-08-21 11:13:58,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102000052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:13:58,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809644279] [2021-08-21 11:13:58,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:13:58,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:13:58,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:13:58,774 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:13:58,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-21 11:14:04,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 11:14:04,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:14:04,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:04,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:05,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809644279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:05,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:05,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:14:05,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894884227] [2021-08-21 11:14:05,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:14:05,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:05,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:14:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:14:05,456 INFO L87 Difference]: Start difference. First operand 6740 states and 18795 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:06,677 INFO L93 Difference]: Finished difference Result 14591 states and 39275 transitions. [2021-08-21 11:14:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:14:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:14:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:06,699 INFO L225 Difference]: With dead ends: 14591 [2021-08-21 11:14:06,700 INFO L226 Difference]: Without dead ends: 14209 [2021-08-21 11:14:06,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1082.6ms TimeCoverageRelationStatistics Valid=994, Invalid=3038, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:14:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14209 states. [2021-08-21 11:14:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14209 to 6410. [2021-08-21 11:14:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6410 states, 6409 states have (on average 2.7781245124044314) internal successors, (17805), 6409 states have internal predecessors, (17805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6410 states to 6410 states and 17805 transitions. [2021-08-21 11:14:06,821 INFO L78 Accepts]: Start accepts. Automaton has 6410 states and 17805 transitions. Word has length 67 [2021-08-21 11:14:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:06,821 INFO L470 AbstractCegarLoop]: Abstraction has 6410 states and 17805 transitions. [2021-08-21 11:14:06,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6410 states and 17805 transitions. [2021-08-21 11:14:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:06,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:06,827 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] [2021-08-21 11:14:06,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-21 11:14:07,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-21 11:14:07,034 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash -729326886, now seen corresponding path program 112 times [2021-08-21 11:14:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:07,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406849811] [2021-08-21 11:14:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:07,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:07,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:07,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406849811] [2021-08-21 11:14:07,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406849811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:07,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829603430] [2021-08-21 11:14:07,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:14:07,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:07,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:07,167 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:07,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-21 11:14:13,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:14:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:14:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:13,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:13,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829603430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:13,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:13,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:14:13,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488333327] [2021-08-21 11:14:13,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:14:13,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:14:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:14:13,833 INFO L87 Difference]: Start difference. First operand 6410 states and 17805 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) [2021-08-21 11:14:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:14,434 INFO L93 Difference]: Finished difference Result 10082 states and 25916 transitions. [2021-08-21 11:14:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 11:14:14,434 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 [2021-08-21 11:14:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:14,447 INFO L225 Difference]: With dead ends: 10082 [2021-08-21 11:14:14,448 INFO L226 Difference]: Without dead ends: 9930 [2021-08-21 11:14:14,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 574.7ms TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:14:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9930 states. [2021-08-21 11:14:14,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9930 to 6385. [2021-08-21 11:14:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6385 states, 6384 states have (on average 2.780388471177945) internal successors, (17750), 6384 states have internal predecessors, (17750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 17750 transitions. [2021-08-21 11:14:14,543 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 17750 transitions. Word has length 67 [2021-08-21 11:14:14,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:14,544 INFO L470 AbstractCegarLoop]: Abstraction has 6385 states and 17750 transitions. [2021-08-21 11:14:14,544 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) [2021-08-21 11:14:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 17750 transitions. [2021-08-21 11:14:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:14,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:14,550 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] [2021-08-21 11:14:14,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-21 11:14:14,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-21 11:14:14,765 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1025104716, now seen corresponding path program 113 times [2021-08-21 11:14:14,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:14,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492921485] [2021-08-21 11:14:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:14,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:14,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:14,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492921485] [2021-08-21 11:14:14,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492921485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:14,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318692008] [2021-08-21 11:14:14,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:14:14,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:14,905 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:14,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-21 11:14:21,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:14:21,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:14:21,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:21,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:21,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318692008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:21,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:21,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:14:21,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823633558] [2021-08-21 11:14:21,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:14:21,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:14:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:14:21,580 INFO L87 Difference]: Start difference. First operand 6385 states and 17750 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) [2021-08-21 11:14:22,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:22,351 INFO L93 Difference]: Finished difference Result 11229 states and 29096 transitions. [2021-08-21 11:14:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 11:14:22,352 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 [2021-08-21 11:14:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:22,369 INFO L225 Difference]: With dead ends: 11229 [2021-08-21 11:14:22,369 INFO L226 Difference]: Without dead ends: 11077 [2021-08-21 11:14:22,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 673.8ms TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 11:14:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11077 states. [2021-08-21 11:14:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11077 to 6525. [2021-08-21 11:14:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6525 states, 6524 states have (on average 2.788166768853464) internal successors, (18190), 6524 states have internal predecessors, (18190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6525 states to 6525 states and 18190 transitions. [2021-08-21 11:14:22,477 INFO L78 Accepts]: Start accepts. Automaton has 6525 states and 18190 transitions. Word has length 67 [2021-08-21 11:14:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:22,478 INFO L470 AbstractCegarLoop]: Abstraction has 6525 states and 18190 transitions. [2021-08-21 11:14:22,478 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) [2021-08-21 11:14:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 6525 states and 18190 transitions. [2021-08-21 11:14:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:22,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:22,485 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] [2021-08-21 11:14:22,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-21 11:14:22,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-21 11:14:22,709 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash -100949102, now seen corresponding path program 114 times [2021-08-21 11:14:22,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:22,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352486355] [2021-08-21 11:14:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:22,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:22,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:22,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352486355] [2021-08-21 11:14:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352486355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:22,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073234465] [2021-08-21 11:14:22,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:14:22,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:22,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:22,845 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:22,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-21 11:14:29,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:14:29,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:14:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:29,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073234465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:29,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:29,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:14:29,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388599919] [2021-08-21 11:14:29,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:14:29,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:14:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:14:29,701 INFO L87 Difference]: Start difference. First operand 6525 states and 18190 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) [2021-08-21 11:14:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:30,573 INFO L93 Difference]: Finished difference Result 12295 states and 32821 transitions. [2021-08-21 11:14:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 11:14:30,573 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 [2021-08-21 11:14:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:30,588 INFO L225 Difference]: With dead ends: 12295 [2021-08-21 11:14:30,588 INFO L226 Difference]: Without dead ends: 12143 [2021-08-21 11:14:30,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:14:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12143 states. [2021-08-21 11:14:30,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12143 to 6645. [2021-08-21 11:14:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6644 states have (on average 2.79425045153522) internal successors, (18565), 6644 states have internal predecessors, (18565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:30,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 18565 transitions. [2021-08-21 11:14:30,692 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 18565 transitions. Word has length 67 [2021-08-21 11:14:30,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:30,692 INFO L470 AbstractCegarLoop]: Abstraction has 6645 states and 18565 transitions. [2021-08-21 11:14:30,692 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) [2021-08-21 11:14:30,693 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 18565 transitions. [2021-08-21 11:14:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:30,698 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:30,699 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] [2021-08-21 11:14:30,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-21 11:14:30,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-21 11:14:30,921 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:30,921 INFO L82 PathProgramCache]: Analyzing trace with hash 558623638, now seen corresponding path program 115 times [2021-08-21 11:14:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:30,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525102154] [2021-08-21 11:14:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:30,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:31,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:31,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:31,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525102154] [2021-08-21 11:14:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525102154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:31,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854791867] [2021-08-21 11:14:31,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:14:31,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:31,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:31,135 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:31,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-21 11:14:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:38,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854791867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:38,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:38,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:14:38,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526261945] [2021-08-21 11:14:38,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:14:38,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:14:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:14:38,132 INFO L87 Difference]: Start difference. First operand 6645 states and 18565 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:39,188 INFO L93 Difference]: Finished difference Result 14471 states and 39126 transitions. [2021-08-21 11:14:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 11:14:39,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:14:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:39,210 INFO L225 Difference]: With dead ends: 14471 [2021-08-21 11:14:39,210 INFO L226 Difference]: Without dead ends: 14089 [2021-08-21 11:14:39,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:14:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14089 states. [2021-08-21 11:14:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14089 to 6285. [2021-08-21 11:14:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6285 states, 6284 states have (on average 2.7753023551877787) internal successors, (17440), 6284 states have internal predecessors, (17440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6285 states to 6285 states and 17440 transitions. [2021-08-21 11:14:39,326 INFO L78 Accepts]: Start accepts. Automaton has 6285 states and 17440 transitions. Word has length 67 [2021-08-21 11:14:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:39,326 INFO L470 AbstractCegarLoop]: Abstraction has 6285 states and 17440 transitions. [2021-08-21 11:14:39,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6285 states and 17440 transitions. [2021-08-21 11:14:39,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:39,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:39,332 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] [2021-08-21 11:14:39,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-21 11:14:39,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-21 11:14:39,548 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash -98526978, now seen corresponding path program 116 times [2021-08-21 11:14:39,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:39,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427001697] [2021-08-21 11:14:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:39,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:39,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:39,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427001697] [2021-08-21 11:14:39,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427001697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:39,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786138437] [2021-08-21 11:14:39,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:14:39,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:39,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:39,721 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:39,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-21 11:14:46,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:14:46,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:14:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:46,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786138437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:46,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:46,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:14:46,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907239636] [2021-08-21 11:14:46,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:14:46,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:46,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:14:46,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:14:46,843 INFO L87 Difference]: Start difference. First operand 6285 states and 17440 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) [2021-08-21 11:14:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:47,646 INFO L93 Difference]: Finished difference Result 10841 states and 27622 transitions. [2021-08-21 11:14:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 11:14:47,646 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 [2021-08-21 11:14:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:47,661 INFO L225 Difference]: With dead ends: 10841 [2021-08-21 11:14:47,661 INFO L226 Difference]: Without dead ends: 10689 [2021-08-21 11:14:47,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=681, Invalid=2399, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 11:14:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10689 states. [2021-08-21 11:14:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10689 to 6485. [2021-08-21 11:14:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 6484 states have (on average 2.785317705120296) internal successors, (18060), 6484 states have internal predecessors, (18060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 18060 transitions. [2021-08-21 11:14:47,811 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 18060 transitions. Word has length 67 [2021-08-21 11:14:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:47,811 INFO L470 AbstractCegarLoop]: Abstraction has 6485 states and 18060 transitions. [2021-08-21 11:14:47,811 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) [2021-08-21 11:14:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 18060 transitions. [2021-08-21 11:14:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:47,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:47,818 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] [2021-08-21 11:14:47,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-21 11:14:48,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-21 11:14:48,021 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:48,021 INFO L82 PathProgramCache]: Analyzing trace with hash -474227472, now seen corresponding path program 117 times [2021-08-21 11:14:48,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:48,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078431134] [2021-08-21 11:14:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:48,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:48,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:48,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078431134] [2021-08-21 11:14:48,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078431134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:48,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163527257] [2021-08-21 11:14:48,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:14:48,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:48,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:48,197 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:48,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-21 11:14:54,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:14:54,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:14:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:14:54,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:14:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:55,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163527257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:55,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:14:55,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:14:55,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350679697] [2021-08-21 11:14:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:14:55,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:14:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:14:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:14:55,273 INFO L87 Difference]: Start difference. First operand 6485 states and 18060 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) [2021-08-21 11:14:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:14:56,009 INFO L93 Difference]: Finished difference Result 10741 states and 27466 transitions. [2021-08-21 11:14:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 11:14:56,010 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 [2021-08-21 11:14:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:14:56,025 INFO L225 Difference]: With dead ends: 10741 [2021-08-21 11:14:56,025 INFO L226 Difference]: Without dead ends: 10589 [2021-08-21 11:14:56,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=631, Invalid=2125, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 11:14:56,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10589 states. [2021-08-21 11:14:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10589 to 6510. [2021-08-21 11:14:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6510 states, 6509 states have (on average 2.7830695959440774) internal successors, (18115), 6509 states have internal predecessors, (18115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:14:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6510 states to 6510 states and 18115 transitions. [2021-08-21 11:14:56,123 INFO L78 Accepts]: Start accepts. Automaton has 6510 states and 18115 transitions. Word has length 67 [2021-08-21 11:14:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:14:56,124 INFO L470 AbstractCegarLoop]: Abstraction has 6510 states and 18115 transitions. [2021-08-21 11:14:56,124 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) [2021-08-21 11:14:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6510 states and 18115 transitions. [2021-08-21 11:14:56,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:14:56,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:14:56,129 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] [2021-08-21 11:14:56,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-21 11:14:56,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-21 11:14:56,347 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:14:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:14:56,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1485041114, now seen corresponding path program 118 times [2021-08-21 11:14:56,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:14:56,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422233878] [2021-08-21 11:14:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:14:56,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:14:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:14:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:14:56,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:14:56,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422233878] [2021-08-21 11:14:56,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422233878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:14:56,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395592854] [2021-08-21 11:14:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:14:56,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:14:56,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:14:56,484 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:14:56,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-21 11:15:03,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:15:03,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:15:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:03,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395592854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:03,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:03,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:15:03,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676716750] [2021-08-21 11:15:03,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:15:03,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:03,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:15:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:15:03,589 INFO L87 Difference]: Start difference. First operand 6510 states and 18115 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) [2021-08-21 11:15:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:04,583 INFO L93 Difference]: Finished difference Result 11405 states and 29162 transitions. [2021-08-21 11:15:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:15:04,583 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 [2021-08-21 11:15:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:04,599 INFO L225 Difference]: With dead ends: 11405 [2021-08-21 11:15:04,599 INFO L226 Difference]: Without dead ends: 11253 [2021-08-21 11:15:04,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=846, Invalid=2814, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 11:15:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11253 states. [2021-08-21 11:15:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11253 to 6685. [2021-08-21 11:15:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6685 states, 6684 states have (on average 2.7947336923997605) internal successors, (18680), 6684 states have internal predecessors, (18680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6685 states to 6685 states and 18680 transitions. [2021-08-21 11:15:04,707 INFO L78 Accepts]: Start accepts. Automaton has 6685 states and 18680 transitions. Word has length 67 [2021-08-21 11:15:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:04,707 INFO L470 AbstractCegarLoop]: Abstraction has 6685 states and 18680 transitions. [2021-08-21 11:15:04,707 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) [2021-08-21 11:15:04,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6685 states and 18680 transitions. [2021-08-21 11:15:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:04,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:04,715 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] [2021-08-21 11:15:04,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-21 11:15:04,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-08-21 11:15:04,941 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1860741608, now seen corresponding path program 119 times [2021-08-21 11:15:04,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:04,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164181031] [2021-08-21 11:15:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:04,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:05,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:05,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164181031] [2021-08-21 11:15:05,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164181031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:05,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366037475] [2021-08-21 11:15:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:15:05,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:05,088 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:05,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-21 11:15:11,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:15:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:15:11,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:12,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366037475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:12,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:12,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:15:12,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555313383] [2021-08-21 11:15:12,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:15:12,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:15:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:15:12,133 INFO L87 Difference]: Start difference. First operand 6685 states and 18680 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) [2021-08-21 11:15:12,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:12,933 INFO L93 Difference]: Finished difference Result 11189 states and 28915 transitions. [2021-08-21 11:15:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 11:15:12,933 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 [2021-08-21 11:15:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:12,949 INFO L225 Difference]: With dead ends: 11189 [2021-08-21 11:15:12,949 INFO L226 Difference]: Without dead ends: 11037 [2021-08-21 11:15:12,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 733.6ms TimeCoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 11:15:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11037 states. [2021-08-21 11:15:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11037 to 6880. [2021-08-21 11:15:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6880 states, 6879 states have (on average 2.8070940543683673) internal successors, (19310), 6879 states have internal predecessors, (19310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6880 states to 6880 states and 19310 transitions. [2021-08-21 11:15:13,059 INFO L78 Accepts]: Start accepts. Automaton has 6880 states and 19310 transitions. Word has length 67 [2021-08-21 11:15:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:13,059 INFO L470 AbstractCegarLoop]: Abstraction has 6880 states and 19310 transitions. [2021-08-21 11:15:13,059 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) [2021-08-21 11:15:13,059 INFO L276 IsEmpty]: Start isEmpty. Operand 6880 states and 19310 transitions. [2021-08-21 11:15:13,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:13,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:13,066 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] [2021-08-21 11:15:13,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-21 11:15:13,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:13,270 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:13,270 INFO L82 PathProgramCache]: Analyzing trace with hash -111968258, now seen corresponding path program 120 times [2021-08-21 11:15:13,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:13,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959561748] [2021-08-21 11:15:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:13,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:13,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:13,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959561748] [2021-08-21 11:15:13,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959561748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:13,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317063160] [2021-08-21 11:15:13,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:15:13,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:13,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:13,441 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:13,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-21 11:15:20,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:15:20,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:15:20,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:20,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317063160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:20,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:20,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:15:20,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363545544] [2021-08-21 11:15:20,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:15:20,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:15:20,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:15:20,581 INFO L87 Difference]: Start difference. First operand 6880 states and 19310 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) [2021-08-21 11:15:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:21,564 INFO L93 Difference]: Finished difference Result 12442 states and 32336 transitions. [2021-08-21 11:15:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:15:21,565 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 [2021-08-21 11:15:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:21,582 INFO L225 Difference]: With dead ends: 12442 [2021-08-21 11:15:21,582 INFO L226 Difference]: Without dead ends: 12290 [2021-08-21 11:15:21,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 878.9ms TimeCoverageRelationStatistics Valid=887, Invalid=2895, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 11:15:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12290 states. [2021-08-21 11:15:21,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12290 to 7105. [2021-08-21 11:15:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 2.8258727477477477) internal successors, (20075), 7104 states have internal predecessors, (20075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 20075 transitions. [2021-08-21 11:15:21,705 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 20075 transitions. Word has length 67 [2021-08-21 11:15:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:21,705 INFO L470 AbstractCegarLoop]: Abstraction has 7105 states and 20075 transitions. [2021-08-21 11:15:21,705 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) [2021-08-21 11:15:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 20075 transitions. [2021-08-21 11:15:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:21,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:21,712 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] [2021-08-21 11:15:21,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-21 11:15:21,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:21,939 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:21,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1238022076, now seen corresponding path program 121 times [2021-08-21 11:15:21,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:21,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819234649] [2021-08-21 11:15:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:21,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:22,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:22,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819234649] [2021-08-21 11:15:22,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819234649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:22,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420530864] [2021-08-21 11:15:22,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:15:22,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:22,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:22,079 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:22,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-21 11:15:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:28,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:29,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420530864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:29,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:29,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:15:29,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954959566] [2021-08-21 11:15:29,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:15:29,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:15:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:15:29,281 INFO L87 Difference]: Start difference. First operand 7105 states and 20075 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) [2021-08-21 11:15:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:30,149 INFO L93 Difference]: Finished difference Result 12815 states and 34187 transitions. [2021-08-21 11:15:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 11:15:30,150 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 [2021-08-21 11:15:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:30,170 INFO L225 Difference]: With dead ends: 12815 [2021-08-21 11:15:30,171 INFO L226 Difference]: Without dead ends: 12663 [2021-08-21 11:15:30,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=852, Invalid=2808, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 11:15:30,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2021-08-21 11:15:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 7225. [2021-08-21 11:15:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7225 states, 7224 states have (on average 2.8308416389811737) internal successors, (20450), 7224 states have internal predecessors, (20450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7225 states to 7225 states and 20450 transitions. [2021-08-21 11:15:30,297 INFO L78 Accepts]: Start accepts. Automaton has 7225 states and 20450 transitions. Word has length 67 [2021-08-21 11:15:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:30,297 INFO L470 AbstractCegarLoop]: Abstraction has 7225 states and 20450 transitions. [2021-08-21 11:15:30,298 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) [2021-08-21 11:15:30,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7225 states and 20450 transitions. [2021-08-21 11:15:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:30,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:30,306 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] [2021-08-21 11:15:30,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2021-08-21 11:15:30,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:30,521 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash -578449336, now seen corresponding path program 122 times [2021-08-21 11:15:30,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:30,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126254416] [2021-08-21 11:15:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:30,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:30,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:30,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126254416] [2021-08-21 11:15:30,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126254416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:30,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315692022] [2021-08-21 11:15:30,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:15:30,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:30,661 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:30,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-21 11:15:37,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:15:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:15:37,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:38,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315692022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:38,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:38,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:15:38,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659220748] [2021-08-21 11:15:38,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:15:38,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:15:38,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:15:38,035 INFO L87 Difference]: Start difference. First operand 7225 states and 20450 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:39,096 INFO L93 Difference]: Finished difference Result 15136 states and 40891 transitions. [2021-08-21 11:15:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:15:39,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:15:39,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:39,123 INFO L225 Difference]: With dead ends: 15136 [2021-08-21 11:15:39,124 INFO L226 Difference]: Without dead ends: 14754 [2021-08-21 11:15:39,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=1058, Invalid=3634, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 11:15:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14754 states. [2021-08-21 11:15:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14754 to 7030. [2021-08-21 11:15:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7030 states, 7029 states have (on average 2.819746763408735) internal successors, (19820), 7029 states have internal predecessors, (19820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7030 states to 7030 states and 19820 transitions. [2021-08-21 11:15:39,273 INFO L78 Accepts]: Start accepts. Automaton has 7030 states and 19820 transitions. Word has length 67 [2021-08-21 11:15:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:39,273 INFO L470 AbstractCegarLoop]: Abstraction has 7030 states and 19820 transitions. [2021-08-21 11:15:39,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 7030 states and 19820 transitions. [2021-08-21 11:15:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:39,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:39,281 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] [2021-08-21 11:15:39,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-21 11:15:39,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:39,497 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash 164498, now seen corresponding path program 123 times [2021-08-21 11:15:39,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:39,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978161018] [2021-08-21 11:15:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:39,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:39,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:39,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978161018] [2021-08-21 11:15:39,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978161018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:39,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463958410] [2021-08-21 11:15:39,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:15:39,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:39,628 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:39,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-21 11:15:46,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 11:15:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:15:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:46,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463958410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:46,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:46,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:15:46,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854138896] [2021-08-21 11:15:46,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:15:46,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:46,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:15:46,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:15:46,953 INFO L87 Difference]: Start difference. First operand 7030 states and 19820 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) [2021-08-21 11:15:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:48,094 INFO L93 Difference]: Finished difference Result 13802 states and 37028 transitions. [2021-08-21 11:15:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 11:15:48,094 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 [2021-08-21 11:15:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:48,119 INFO L225 Difference]: With dead ends: 13802 [2021-08-21 11:15:48,119 INFO L226 Difference]: Without dead ends: 13650 [2021-08-21 11:15:48,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 988.2ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 11:15:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13650 states. [2021-08-21 11:15:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13650 to 7420. [2021-08-21 11:15:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7420 states, 7419 states have (on average 2.8413532821134924) internal successors, (21080), 7419 states have internal predecessors, (21080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7420 states to 7420 states and 21080 transitions. [2021-08-21 11:15:48,273 INFO L78 Accepts]: Start accepts. Automaton has 7420 states and 21080 transitions. Word has length 67 [2021-08-21 11:15:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:48,273 INFO L470 AbstractCegarLoop]: Abstraction has 7420 states and 21080 transitions. [2021-08-21 11:15:48,273 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) [2021-08-21 11:15:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7420 states and 21080 transitions. [2021-08-21 11:15:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:48,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:48,283 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] [2021-08-21 11:15:48,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-21 11:15:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-21 11:15:48,483 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash 659737238, now seen corresponding path program 124 times [2021-08-21 11:15:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:48,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808407302] [2021-08-21 11:15:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:48,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:48,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:48,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808407302] [2021-08-21 11:15:48,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808407302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:48,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171425022] [2021-08-21 11:15:48,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:15:48,705 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:48,706 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:48,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-21 11:15:55,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:15:55,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:15:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:15:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:15:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:55,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171425022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:55,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:15:55,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:15:55,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482642793] [2021-08-21 11:15:55,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:15:55,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:15:55,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:15:55,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:15:55,958 INFO L87 Difference]: Start difference. First operand 7420 states and 21080 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:15:57,126 INFO L93 Difference]: Finished difference Result 15564 states and 42334 transitions. [2021-08-21 11:15:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 11:15:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:15:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:15:57,150 INFO L225 Difference]: With dead ends: 15564 [2021-08-21 11:15:57,150 INFO L226 Difference]: Without dead ends: 15182 [2021-08-21 11:15:57,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 1045.4ms TimeCoverageRelationStatistics Valid=1289, Invalid=4411, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 11:15:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15182 states. [2021-08-21 11:15:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15182 to 6988. [2021-08-21 11:15:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6988 states, 6987 states have (on average 2.82639187061686) internal successors, (19748), 6987 states have internal predecessors, (19748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6988 states to 6988 states and 19748 transitions. [2021-08-21 11:15:57,285 INFO L78 Accepts]: Start accepts. Automaton has 6988 states and 19748 transitions. Word has length 67 [2021-08-21 11:15:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:15:57,285 INFO L470 AbstractCegarLoop]: Abstraction has 6988 states and 19748 transitions. [2021-08-21 11:15:57,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:15:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 6988 states and 19748 transitions. [2021-08-21 11:15:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:15:57,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:15:57,292 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] [2021-08-21 11:15:57,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-21 11:15:57,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-21 11:15:57,508 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:15:57,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:15:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1171555952, now seen corresponding path program 125 times [2021-08-21 11:15:57,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:15:57,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391016940] [2021-08-21 11:15:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:15:57,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:15:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:15:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:15:57,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:15:57,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391016940] [2021-08-21 11:15:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391016940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:15:57,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701864055] [2021-08-21 11:15:57,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:15:57,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:15:57,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:15:57,646 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:15:57,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-21 11:16:04,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 11:16:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:16:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:05,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701864055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:05,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:05,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:16:05,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287145990] [2021-08-21 11:16:05,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:16:05,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:16:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:16:05,032 INFO L87 Difference]: Start difference. First operand 6988 states and 19748 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) [2021-08-21 11:16:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:16:06,200 INFO L93 Difference]: Finished difference Result 12741 states and 33319 transitions. [2021-08-21 11:16:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 11:16:06,200 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 [2021-08-21 11:16:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:16:06,221 INFO L225 Difference]: With dead ends: 12741 [2021-08-21 11:16:06,222 INFO L226 Difference]: Without dead ends: 12589 [2021-08-21 11:16:06,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 1045.2ms TimeCoverageRelationStatistics Valid=1099, Invalid=3457, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 11:16:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12589 states. [2021-08-21 11:16:06,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12589 to 7063. [2021-08-21 11:16:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7063 states, 7062 states have (on average 2.8324837156612857) internal successors, (20003), 7062 states have internal predecessors, (20003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 20003 transitions. [2021-08-21 11:16:06,339 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 20003 transitions. Word has length 67 [2021-08-21 11:16:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:16:06,339 INFO L470 AbstractCegarLoop]: Abstraction has 7063 states and 20003 transitions. [2021-08-21 11:16:06,340 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) [2021-08-21 11:16:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 20003 transitions. [2021-08-21 11:16:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:16:06,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:16:06,346 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] [2021-08-21 11:16:06,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2021-08-21 11:16:06,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-21 11:16:06,567 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:16:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:16:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 45502134, now seen corresponding path program 126 times [2021-08-21 11:16:06,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:16:06,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660269547] [2021-08-21 11:16:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:16:06,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:16:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:06,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:16:06,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660269547] [2021-08-21 11:16:06,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660269547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:06,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073742833] [2021-08-21 11:16:06,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:16:06,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:06,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:16:06,705 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:16:06,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-21 11:16:13,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 11:16:13,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:16:13,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:14,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073742833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:14,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:14,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:16:14,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862427754] [2021-08-21 11:16:14,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:16:14,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:14,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:16:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:16:14,206 INFO L87 Difference]: Start difference. First operand 7063 states and 20003 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) [2021-08-21 11:16:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:16:15,294 INFO L93 Difference]: Finished difference Result 13864 states and 37395 transitions. [2021-08-21 11:16:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 11:16:15,295 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 [2021-08-21 11:16:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:16:15,317 INFO L225 Difference]: With dead ends: 13864 [2021-08-21 11:16:15,317 INFO L226 Difference]: Without dead ends: 13712 [2021-08-21 11:16:15,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 965.4ms TimeCoverageRelationStatistics Valid=956, Invalid=3076, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 11:16:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2021-08-21 11:16:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 7158. [2021-08-21 11:16:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7158 states, 7157 states have (on average 2.839597596758418) internal successors, (20323), 7157 states have internal predecessors, (20323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7158 states to 7158 states and 20323 transitions. [2021-08-21 11:16:15,452 INFO L78 Accepts]: Start accepts. Automaton has 7158 states and 20323 transitions. Word has length 67 [2021-08-21 11:16:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:16:15,453 INFO L470 AbstractCegarLoop]: Abstraction has 7158 states and 20323 transitions. [2021-08-21 11:16:15,453 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) [2021-08-21 11:16:15,453 INFO L276 IsEmpty]: Start isEmpty. Operand 7158 states and 20323 transitions. [2021-08-21 11:16:15,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:16:15,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:16:15,461 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] [2021-08-21 11:16:15,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-21 11:16:15,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-21 11:16:15,676 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:16:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:16:15,676 INFO L82 PathProgramCache]: Analyzing trace with hash 705074874, now seen corresponding path program 127 times [2021-08-21 11:16:15,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:16:15,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127113069] [2021-08-21 11:16:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:16:15,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:16:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:15,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:16:15,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127113069] [2021-08-21 11:16:15,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127113069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:15,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148867532] [2021-08-21 11:16:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:16:15,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:16:15,818 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:16:15,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-21 11:16:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:23,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148867532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:23,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:23,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:16:23,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612460042] [2021-08-21 11:16:23,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:16:23,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:16:23,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:16:23,301 INFO L87 Difference]: Start difference. First operand 7158 states and 20323 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:16:24,788 INFO L93 Difference]: Finished difference Result 15791 states and 43066 transitions. [2021-08-21 11:16:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 11:16:24,788 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:16:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:16:24,819 INFO L225 Difference]: With dead ends: 15791 [2021-08-21 11:16:24,819 INFO L226 Difference]: Without dead ends: 15409 [2021-08-21 11:16:24,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 1322.7ms TimeCoverageRelationStatistics Valid=1259, Invalid=3997, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 11:16:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15409 states. [2021-08-21 11:16:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15409 to 6963. [2021-08-21 11:16:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6963 states, 6962 states have (on average 2.828641195058891) internal successors, (19693), 6962 states have internal predecessors, (19693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6963 states to 6963 states and 19693 transitions. [2021-08-21 11:16:24,985 INFO L78 Accepts]: Start accepts. Automaton has 6963 states and 19693 transitions. Word has length 67 [2021-08-21 11:16:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:16:24,985 INFO L470 AbstractCegarLoop]: Abstraction has 6963 states and 19693 transitions. [2021-08-21 11:16:24,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6963 states and 19693 transitions. [2021-08-21 11:16:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:16:24,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:16:24,993 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] [2021-08-21 11:16:25,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-21 11:16:25,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:25,217 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:16:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:16:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2020427580, now seen corresponding path program 128 times [2021-08-21 11:16:25,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:16:25,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978682556] [2021-08-21 11:16:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:16:25,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:16:25,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:25,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:16:25,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978682556] [2021-08-21 11:16:25,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978682556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:25,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074589922] [2021-08-21 11:16:25,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:16:25,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:25,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:16:25,482 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:16:25,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-21 11:16:32,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 11:16:32,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:16:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:32,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074589922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:32,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:32,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:16:32,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924345729] [2021-08-21 11:16:32,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:16:32,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:16:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:16:32,991 INFO L87 Difference]: Start difference. First operand 6963 states and 19693 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) [2021-08-21 11:16:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:16:34,539 INFO L93 Difference]: Finished difference Result 15977 states and 42858 transitions. [2021-08-21 11:16:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-21 11:16:34,539 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 [2021-08-21 11:16:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:16:34,565 INFO L225 Difference]: With dead ends: 15977 [2021-08-21 11:16:34,565 INFO L226 Difference]: Without dead ends: 15125 [2021-08-21 11:16:34,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 1371.9ms TimeCoverageRelationStatistics Valid=1361, Invalid=4959, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 11:16:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15125 states. [2021-08-21 11:16:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15125 to 7240. [2021-08-21 11:16:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7240 states, 7239 states have (on average 2.8412764193949442) internal successors, (20568), 7239 states have internal predecessors, (20568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 20568 transitions. [2021-08-21 11:16:34,708 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 20568 transitions. Word has length 67 [2021-08-21 11:16:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:16:34,708 INFO L470 AbstractCegarLoop]: Abstraction has 7240 states and 20568 transitions. [2021-08-21 11:16:34,708 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) [2021-08-21 11:16:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 20568 transitions. [2021-08-21 11:16:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:16:34,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:16:34,790 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] [2021-08-21 11:16:34,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-21 11:16:35,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:35,017 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:16:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:16:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1189154750, now seen corresponding path program 129 times [2021-08-21 11:16:35,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:16:35,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559726373] [2021-08-21 11:16:35,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:16:35,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:16:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:35,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:16:35,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559726373] [2021-08-21 11:16:35,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559726373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:35,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985723426] [2021-08-21 11:16:35,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 11:16:35,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:16:35,157 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:16:35,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-21 11:16:42,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 11:16:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:16:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:42,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985723426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:42,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:42,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:16:42,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585657582] [2021-08-21 11:16:42,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:16:42,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:42,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:16:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:16:42,542 INFO L87 Difference]: Start difference. First operand 7240 states and 20568 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) [2021-08-21 11:16:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:16:43,163 INFO L93 Difference]: Finished difference Result 10611 states and 28055 transitions. [2021-08-21 11:16:43,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 11:16:43,163 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 [2021-08-21 11:16:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:16:43,178 INFO L225 Difference]: With dead ends: 10611 [2021-08-21 11:16:43,178 INFO L226 Difference]: Without dead ends: 10459 [2021-08-21 11:16:43,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=489, Invalid=1767, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:16:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2021-08-21 11:16:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 7265. [2021-08-21 11:16:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7265 states, 7264 states have (on average 2.839069383259912) internal successors, (20623), 7264 states have internal predecessors, (20623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:43,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7265 states to 7265 states and 20623 transitions. [2021-08-21 11:16:43,279 INFO L78 Accepts]: Start accepts. Automaton has 7265 states and 20623 transitions. Word has length 67 [2021-08-21 11:16:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:16:43,279 INFO L470 AbstractCegarLoop]: Abstraction has 7265 states and 20623 transitions. [2021-08-21 11:16:43,279 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) [2021-08-21 11:16:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 7265 states and 20623 transitions. [2021-08-21 11:16:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:16:43,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:16:43,286 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] [2021-08-21 11:16:43,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2021-08-21 11:16:43,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:43,501 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:16:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:16:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash -170640228, now seen corresponding path program 130 times [2021-08-21 11:16:43,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:16:43,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613820906] [2021-08-21 11:16:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:16:43,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:16:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:43,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:16:43,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613820906] [2021-08-21 11:16:43,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613820906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:43,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458146648] [2021-08-21 11:16:43,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 11:16:43,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:43,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:16:43,642 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:16:43,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-21 11:16:50,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 11:16:50,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:16:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:51,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458146648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:51,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:51,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:16:51,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925323423] [2021-08-21 11:16:51,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:16:51,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:16:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:16:51,127 INFO L87 Difference]: Start difference. First operand 7265 states and 20623 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) [2021-08-21 11:16:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:16:51,684 INFO L93 Difference]: Finished difference Result 10501 states and 27807 transitions. [2021-08-21 11:16:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 11:16:51,685 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 [2021-08-21 11:16:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:16:51,700 INFO L225 Difference]: With dead ends: 10501 [2021-08-21 11:16:51,700 INFO L226 Difference]: Without dead ends: 10349 [2021-08-21 11:16:51,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=418, Invalid=1474, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 11:16:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-08-21 11:16:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 7215. [2021-08-21 11:16:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7215 states, 7214 states have (on average 2.843498752425839) internal successors, (20513), 7214 states have internal predecessors, (20513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:16:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 20513 transitions. [2021-08-21 11:16:51,805 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 20513 transitions. Word has length 67 [2021-08-21 11:16:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:16:51,805 INFO L470 AbstractCegarLoop]: Abstraction has 7215 states and 20513 transitions. [2021-08-21 11:16:51,805 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) [2021-08-21 11:16:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 20513 transitions. [2021-08-21 11:16:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:16:51,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:16:51,812 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] [2021-08-21 11:16:51,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2021-08-21 11:16:52,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:52,037 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:16:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:16:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1996882952, now seen corresponding path program 131 times [2021-08-21 11:16:52,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:16:52,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963871614] [2021-08-21 11:16:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:16:52,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:16:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:16:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:52,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:16:52,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963871614] [2021-08-21 11:16:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963871614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:52,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813380842] [2021-08-21 11:16:52,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 11:16:52,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:16:52,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:16:52,277 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:16:52,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-21 11:16:59,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 11:16:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:16:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:16:59,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:16:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:16:59,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813380842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:16:59,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:16:59,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:16:59,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088305872] [2021-08-21 11:16:59,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:16:59,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:16:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:16:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:16:59,951 INFO L87 Difference]: Start difference. First operand 7215 states and 20513 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) [2021-08-21 11:17:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:17:01,054 INFO L93 Difference]: Finished difference Result 13107 states and 35738 transitions. [2021-08-21 11:17:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 11:17:01,054 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 [2021-08-21 11:17:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:17:01,073 INFO L225 Difference]: With dead ends: 13107 [2021-08-21 11:17:01,074 INFO L226 Difference]: Without dead ends: 12955 [2021-08-21 11:17:01,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1015.1ms TimeCoverageRelationStatistics Valid=804, Invalid=2736, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 11:17:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12955 states. [2021-08-21 11:17:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12955 to 7545. [2021-08-21 11:17:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7544 states have (on average 2.850344644750795) internal successors, (21503), 7544 states have internal predecessors, (21503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:17:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 21503 transitions. [2021-08-21 11:17:01,236 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 21503 transitions. Word has length 67 [2021-08-21 11:17:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:17:01,236 INFO L470 AbstractCegarLoop]: Abstraction has 7545 states and 21503 transitions. [2021-08-21 11:17:01,237 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) [2021-08-21 11:17:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 21503 transitions. [2021-08-21 11:17:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:17:01,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:17:01,245 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] [2021-08-21 11:17:01,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-21 11:17:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-08-21 11:17:01,473 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:17:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:17:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1337310212, now seen corresponding path program 132 times [2021-08-21 11:17:01,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:17:01,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308552259] [2021-08-21 11:17:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:17:01,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:17:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:17:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:17:01,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:17:01,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308552259] [2021-08-21 11:17:01,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308552259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:17:01,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24789883] [2021-08-21 11:17:01,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 11:17:01,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:17:01,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:17:01,737 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:17:01,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-21 11:17:08,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 11:17:08,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 11:17:08,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:17:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:17:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:17:09,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24789883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:17:09,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:17:09,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 11:17:09,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016686470] [2021-08-21 11:17:09,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 11:17:09,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:17:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 11:17:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 11:17:09,375 INFO L87 Difference]: Start difference. First operand 7545 states and 21503 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:17:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:17:10,594 INFO L93 Difference]: Finished difference Result 15018 states and 41562 transitions. [2021-08-21 11:17:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 11:17:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have 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 [2021-08-21 11:17:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:17:10,618 INFO L225 Difference]: With dead ends: 15018 [2021-08-21 11:17:10,618 INFO L226 Difference]: Without dead ends: 14636 [2021-08-21 11:17:10,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 1227.2ms TimeCoverageRelationStatistics Valid=1047, Invalid=3509, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 11:17:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14636 states. [2021-08-21 11:17:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14636 to 7215. [2021-08-21 11:17:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7215 states, 7214 states have (on average 2.843498752425839) internal successors, (20513), 7214 states have internal predecessors, (20513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:17:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 20513 transitions. [2021-08-21 11:17:10,827 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 20513 transitions. Word has length 67 [2021-08-21 11:17:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:17:10,827 INFO L470 AbstractCegarLoop]: Abstraction has 7215 states and 20513 transitions. [2021-08-21 11:17:10,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:17:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 20513 transitions. [2021-08-21 11:17:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:17:10,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:17:10,834 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] [2021-08-21 11:17:10,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2021-08-21 11:17:11,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:17:11,057 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:17:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:17:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 687792580, now seen corresponding path program 133 times [2021-08-21 11:17:11,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:17:11,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215517690] [2021-08-21 11:17:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:17:11,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:17:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:17:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:17:11,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:17:11,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215517690] [2021-08-21 11:17:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215517690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:17:11,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181750825] [2021-08-21 11:17:11,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 11:17:11,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:17:11,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:17:11,213 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:17:11,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-21 11:17:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:17:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 11:17:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 11:17:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:17:19,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181750825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:17:19,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 11:17:19,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 11:17:19,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361890660] [2021-08-21 11:17:19,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 11:17:19,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 11:17:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 11:17:19,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-21 11:17:19,349 INFO L87 Difference]: Start difference. First operand 7215 states and 20513 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) [2021-08-21 11:17:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 11:17:19,938 INFO L93 Difference]: Finished difference Result 10960 states and 28797 transitions. [2021-08-21 11:17:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 11:17:19,938 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 [2021-08-21 11:17:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 11:17:19,957 INFO L225 Difference]: With dead ends: 10960 [2021-08-21 11:17:19,957 INFO L226 Difference]: Without dead ends: 10808 [2021-08-21 11:17:19,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=484, Invalid=1772, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 11:17:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10808 states. [2021-08-21 11:17:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10808 to 7190. [2021-08-21 11:17:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 2.8457365419390737) internal successors, (20458), 7189 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 11:17:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 20458 transitions. [2021-08-21 11:17:20,094 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 20458 transitions. Word has length 67 [2021-08-21 11:17:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 11:17:20,094 INFO L470 AbstractCegarLoop]: Abstraction has 7190 states and 20458 transitions. [2021-08-21 11:17:20,094 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) [2021-08-21 11:17:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 20458 transitions. [2021-08-21 11:17:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 11:17:20,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 11:17:20,103 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] [2021-08-21 11:17:20,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-21 11:17:20,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:17:20,329 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 11:17:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 11:17:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 57389124, now seen corresponding path program 134 times [2021-08-21 11:17:20,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 11:17:20,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444202149] [2021-08-21 11:17:20,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 11:17:20,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 11:17:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 11:17:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 11:17:20,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 11:17:20,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444202149] [2021-08-21 11:17:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444202149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 11:17:20,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438457722] [2021-08-21 11:17:20,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 11:17:20,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 11:17:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 11:17:20,492 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 11:17:20,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 11:17:21,200 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 [2021-08-21 11:17:21,200 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 11:17:22,209 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-21 11:17:22,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-21 11:17:22,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 11:17:22,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-21 11:17:22,410 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 68 with TraceHistMax 4,while executing Executor. [2021-08-21 11:17:22,411 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 11:17:22,411 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 11:17:22,414 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 11:17:22,414 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 11:17:22,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:17:22 BasicIcfg [2021-08-21 11:17:22,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 11:17:22,416 INFO L168 Benchmark]: Toolchain (without parser) took 889062.07 ms. Allocated memory was 161.5 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 123.5 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-21 11:17:22,416 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 161.5 MB. Free memory is still 142.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 11:17:22,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.67 ms. Allocated memory is still 161.5 MB. Free memory was 123.4 MB in the beginning and 134.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. [2021-08-21 11:17:22,417 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.21 ms. Allocated memory is still 161.5 MB. Free memory was 134.9 MB in the beginning and 133.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 11:17:22,417 INFO L168 Benchmark]: Boogie Preprocessor took 13.89 ms. Allocated memory is still 161.5 MB. Free memory was 133.2 MB in the beginning and 131.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 11:17:22,417 INFO L168 Benchmark]: RCFGBuilder took 448.34 ms. Allocated memory is still 161.5 MB. Free memory was 131.6 MB in the beginning and 109.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-21 11:17:22,417 INFO L168 Benchmark]: TraceAbstraction took 888107.52 ms. Allocated memory was 161.5 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 109.6 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. [2021-08-21 11:17:22,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 161.5 MB. Free memory is still 142.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 389.67 ms. Allocated memory is still 161.5 MB. Free memory was 123.4 MB in the beginning and 134.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 44.21 ms. Allocated memory is still 161.5 MB. Free memory was 134.9 MB in the beginning and 133.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.89 ms. Allocated memory is still 161.5 MB. Free memory was 133.2 MB in the beginning and 131.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 448.34 ms. Allocated memory is still 161.5 MB. Free memory was 131.6 MB in the beginning and 109.8 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 888107.52 ms. Allocated memory was 161.5 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 109.6 MB in the beginning and 3.1 GB in the end (delta: -3.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 analyzing trace of length 68 with TraceHistMax 4,while executing Executor. - 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 analyzing trace of length 68 with TraceHistMax 4,while executing Executor. - 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 analyzing trace of length 68 with TraceHistMax 4,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 888002.7ms, OverallIterations: 167, TraceHistogramMax: 6, EmptinessCheckTime: 851.3ms, AutomataDifference: 193671.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 69.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14997 SDtfs, 154355 SDslu, 185228 SDs, 0 SdLazy, 30381 SolverSat, 11910 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 78158.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15542 GetRequests, 8569 SyntacticMatches, 21 SemanticMatches, 6952 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 101207 ImplicationChecksByTransitivity, 124724.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7545occurred in iteration=164, InterpolantAutomatonStates: 5820, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 13223.9ms AutomataMinimizationTime, 166 MinimizatonAttempts, 511006 StatesRemovedByMinimization, 166 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1572.1ms SsaConstructionTime, 3548.7ms SatisfiabilityAnalysisTime, 89634.0ms InterpolantComputationTime, 19895 NumberOfCodeBlocks, 19895 NumberOfCodeBlocksAsserted, 622 NumberOfCheckSat, 19570 ConstructedInterpolants, 5 QuantifiedInterpolants, 164161 SizeOfPredicates, 318 NumberOfNonLiveVariables, 24405 ConjunctsInSsa, 2058 ConjunctsInUnsatCore, 325 InterpolantComputations, 7 PerfectInterpolantSequences, 0/7410 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