/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 18:44:41,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 18:44:41,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 18:44:41,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 18:44:41,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 18:44:41,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 18:44:41,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 18:44:41,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 18:44:41,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 18:44:41,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 18:44:41,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 18:44:41,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 18:44:41,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 18:44:41,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 18:44:41,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 18:44:41,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 18:44:41,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 18:44:41,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 18:44:41,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 18:44:41,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 18:44:41,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 18:44:41,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 18:44:41,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 18:44:41,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 18:44:41,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 18:44:41,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 18:44:41,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 18:44:41,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 18:44:41,656 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 18:44:41,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 18:44:41,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 18:44:41,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 18:44:41,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 18:44:41,698 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 18:44:41,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 18:44:41,698 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 18:44:41,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 18:44:41,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 18:44:41,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 18:44:41,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 18:44:41,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 18:44:41,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 18:44:41,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 18:44:41,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 18:44:41,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 18:44:41,703 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 18:44:41,703 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 18:44:41,703 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 18:44:41,703 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 18:44:41,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 18:44:41,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:44:41,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 18:44:41,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 18:44:41,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 18:44:41,704 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 18:44:41,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 18:44:41,704 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 18:44:41,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 18:44:41,705 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 18:44:41,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 18:44:41,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 18:44:42,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 18:44:42,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 18:44:42,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-06 18:44:42,024 INFO L275 PluginConnector]: CDTParser initialized [2021-08-06 18:44:42,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-08-06 18:44:42,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec6f1d40/d1779f9640774eb39630b09bde790596/FLAGa3e7c83b6 [2021-08-06 18:44:42,708 INFO L306 CDTParser]: Found 1 translation units. [2021-08-06 18:44:42,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-08-06 18:44:42,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec6f1d40/d1779f9640774eb39630b09bde790596/FLAGa3e7c83b6 [2021-08-06 18:44:42,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec6f1d40/d1779f9640774eb39630b09bde790596 [2021-08-06 18:44:42,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 18:44:42,936 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-06 18:44:42,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-06 18:44:42,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-06 18:44:42,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-06 18:44:42,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:44:42" (1/1) ... [2021-08-06 18:44:42,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41186ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:42, skipping insertion in model container [2021-08-06 18:44:42,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.08 06:44:42" (1/1) ... [2021-08-06 18:44:42,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-06 18:44:42,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-06 18:44:43,318 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-08-06 18:44:43,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:44:43,332 INFO L203 MainTranslator]: Completed pre-run [2021-08-06 18:44:43,375 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2021-08-06 18:44:43,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-06 18:44:43,413 INFO L208 MainTranslator]: Completed translation [2021-08-06 18:44:43,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43 WrapperNode [2021-08-06 18:44:43,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-06 18:44:43,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 18:44:43,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 18:44:43,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 18:44:43,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 18:44:43,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 18:44:43,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 18:44:43,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 18:44:43,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 18:44:43,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 18:44:43,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 18:44:43,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 18:44:43,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (1/1) ... [2021-08-06 18:44:43,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 18:44:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:43,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 18:44:43,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 18:44:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-06 18:44:43,581 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-06 18:44:43,583 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-06 18:44:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 18:44:43,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 18:44:43,585 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 18:44:43,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 18:44:43,937 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-06 18:44:43,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:44:43 BoogieIcfgContainer [2021-08-06 18:44:43,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 18:44:43,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 18:44:43,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 18:44:43,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 18:44:43,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.08 06:44:42" (1/3) ... [2021-08-06 18:44:43,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417edfcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:44:43, skipping insertion in model container [2021-08-06 18:44:43,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.08 06:44:43" (2/3) ... [2021-08-06 18:44:43,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@417edfcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 06:44:43, skipping insertion in model container [2021-08-06 18:44:43,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 06:44:43" (3/3) ... [2021-08-06 18:44:43,945 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-08-06 18:44:43,949 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 18:44:43,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 18:44:43,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 18:44:43,949 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 18:44:43,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,973 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,974 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,978 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,982 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,985 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,985 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,986 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,990 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,990 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,990 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,991 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,991 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,991 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-06 18:44:43,993 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-06 18:44:44,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 18:44:44,033 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 18:44:44,033 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 18:44:44,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 18:44:44,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:44,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:44,231 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:44,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2112281486, now seen corresponding path program 1 times [2021-08-06 18:44:44,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:44,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682490064] [2021-08-06 18:44:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:44,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:44,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:44,573 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:44,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:44,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:44,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:44,627 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:44,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:44,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682490064] [2021-08-06 18:44:44,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682490064] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:44,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:44,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:44:44,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861482539] [2021-08-06 18:44:44,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:44:44,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:44:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:44:44,705 INFO L87 Difference]: Start difference. First operand has 780 states, 704 states have (on average 1.4815340909090908) internal successors, (1043), 779 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:44,935 INFO L93 Difference]: Finished difference Result 1539 states and 1811 transitions. [2021-08-06 18:44:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 18:44:44,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 18:44:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:44,953 INFO L225 Difference]: With dead ends: 1539 [2021-08-06 18:44:44,953 INFO L226 Difference]: Without dead ends: 552 [2021-08-06 18:44:44,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-06 18:44:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 368. [2021-08-06 18:44:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 358 states have (on average 1.3575418994413408) internal successors, (486), 367 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 486 transitions. [2021-08-06 18:44:45,000 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 486 transitions. Word has length 32 [2021-08-06 18:44:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:45,000 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 486 transitions. [2021-08-06 18:44:45,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 486 transitions. [2021-08-06 18:44:45,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 18:44:45,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:45,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:45,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 18:44:45,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash 263941995, now seen corresponding path program 1 times [2021-08-06 18:44:45,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:45,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551291951] [2021-08-06 18:44:45,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:45,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:45,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:45,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:45,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:45,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:45,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:45,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:45,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:45,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551291951] [2021-08-06 18:44:45,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551291951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:45,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:45,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:44:45,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651363187] [2021-08-06 18:44:45,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:44:45,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:44:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:44:45,181 INFO L87 Difference]: Start difference. First operand 368 states and 486 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:45,310 INFO L93 Difference]: Finished difference Result 550 states and 720 transitions. [2021-08-06 18:44:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 18:44:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 18:44:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:45,312 INFO L225 Difference]: With dead ends: 550 [2021-08-06 18:44:45,313 INFO L226 Difference]: Without dead ends: 392 [2021-08-06 18:44:45,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-08-06 18:44:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 342. [2021-08-06 18:44:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 334 states have (on average 1.3892215568862276) internal successors, (464), 341 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 464 transitions. [2021-08-06 18:44:45,333 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 464 transitions. Word has length 36 [2021-08-06 18:44:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:45,334 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 464 transitions. [2021-08-06 18:44:45,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 464 transitions. [2021-08-06 18:44:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 18:44:45,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:45,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:45,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 18:44:45,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1447548911, now seen corresponding path program 1 times [2021-08-06 18:44:45,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:45,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684805062] [2021-08-06 18:44:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:45,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:45,405 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:45,412 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:45,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:45,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:45,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:45,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684805062] [2021-08-06 18:44:45,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684805062] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:45,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:45,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 18:44:45,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595400280] [2021-08-06 18:44:45,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 18:44:45,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 18:44:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-06 18:44:45,517 INFO L87 Difference]: Start difference. First operand 342 states and 464 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:45,654 INFO L93 Difference]: Finished difference Result 431 states and 547 transitions. [2021-08-06 18:44:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 18:44:45,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 18:44:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:45,657 INFO L225 Difference]: With dead ends: 431 [2021-08-06 18:44:45,657 INFO L226 Difference]: Without dead ends: 359 [2021-08-06 18:44:45,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-06 18:44:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 289. [2021-08-06 18:44:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 281 states have (on average 1.3451957295373667) internal successors, (378), 288 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 378 transitions. [2021-08-06 18:44:45,667 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 378 transitions. Word has length 36 [2021-08-06 18:44:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:45,668 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 378 transitions. [2021-08-06 18:44:45,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 378 transitions. [2021-08-06 18:44:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:45,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:45,669 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:45,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 18:44:45,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:45,670 INFO L82 PathProgramCache]: Analyzing trace with hash 10456968, now seen corresponding path program 1 times [2021-08-06 18:44:45,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:45,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544417486] [2021-08-06 18:44:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:45,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:45,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:45,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:45,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:45,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:45,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:45,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:45,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:45,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544417486] [2021-08-06 18:44:45,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544417486] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:45,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:45,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-06 18:44:45,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868599403] [2021-08-06 18:44:45,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 18:44:45,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 18:44:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-06 18:44:45,892 INFO L87 Difference]: Start difference. First operand 289 states and 378 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:46,021 INFO L93 Difference]: Finished difference Result 760 states and 975 transitions. [2021-08-06 18:44:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:46,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:46,024 INFO L225 Difference]: With dead ends: 760 [2021-08-06 18:44:46,024 INFO L226 Difference]: Without dead ends: 613 [2021-08-06 18:44:46,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:44:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-06 18:44:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 310. [2021-08-06 18:44:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 302 states have (on average 1.3410596026490067) internal successors, (405), 309 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 405 transitions. [2021-08-06 18:44:46,033 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 405 transitions. Word has length 40 [2021-08-06 18:44:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:46,035 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 405 transitions. [2021-08-06 18:44:46,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 405 transitions. [2021-08-06 18:44:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:46,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:46,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:46,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 18:44:46,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1198227988, now seen corresponding path program 2 times [2021-08-06 18:44:46,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:46,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391249771] [2021-08-06 18:44:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:46,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:46,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:44:46,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:46,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:46,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:46,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391249771] [2021-08-06 18:44:46,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391249771] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:46,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:46,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:44:46,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174173390] [2021-08-06 18:44:46,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:44:46,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:44:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:44:46,177 INFO L87 Difference]: Start difference. First operand 310 states and 405 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:46,252 INFO L93 Difference]: Finished difference Result 531 states and 680 transitions. [2021-08-06 18:44:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 18:44:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:46,265 INFO L225 Difference]: With dead ends: 531 [2021-08-06 18:44:46,265 INFO L226 Difference]: Without dead ends: 451 [2021-08-06 18:44:46,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-08-06 18:44:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 329. [2021-08-06 18:44:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 321 states have (on average 1.35202492211838) internal successors, (434), 328 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 434 transitions. [2021-08-06 18:44:46,274 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 434 transitions. Word has length 40 [2021-08-06 18:44:46,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:46,274 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 434 transitions. [2021-08-06 18:44:46,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 434 transitions. [2021-08-06 18:44:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:46,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:46,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:46,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 18:44:46,278 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:46,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:46,279 INFO L82 PathProgramCache]: Analyzing trace with hash 557630062, now seen corresponding path program 3 times [2021-08-06 18:44:46,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:46,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403170522] [2021-08-06 18:44:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:46,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,366 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:46,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:46,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:46,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:46,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:46,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403170522] [2021-08-06 18:44:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403170522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:46,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:46,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:44:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820219878] [2021-08-06 18:44:46,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:44:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:44:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:44:46,421 INFO L87 Difference]: Start difference. First operand 329 states and 434 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:46,523 INFO L93 Difference]: Finished difference Result 1074 states and 1385 transitions. [2021-08-06 18:44:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:46,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:46,529 INFO L225 Difference]: With dead ends: 1074 [2021-08-06 18:44:46,529 INFO L226 Difference]: Without dead ends: 915 [2021-08-06 18:44:46,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:44:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-06 18:44:46,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 326. [2021-08-06 18:44:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 318 states have (on average 1.3773584905660377) internal successors, (438), 325 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 438 transitions. [2021-08-06 18:44:46,543 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 438 transitions. Word has length 40 [2021-08-06 18:44:46,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:46,543 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 438 transitions. [2021-08-06 18:44:46,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 438 transitions. [2021-08-06 18:44:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 18:44:46,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:46,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:46,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 18:44:46,549 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1960098348, now seen corresponding path program 4 times [2021-08-06 18:44:46,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:46,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196663607] [2021-08-06 18:44:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:46,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:46,642 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:46,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:46,660 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:46,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:46,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196663607] [2021-08-06 18:44:46,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196663607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:44:46,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 18:44:46,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 18:44:46,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723658384] [2021-08-06 18:44:46,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 18:44:46,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 18:44:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-06 18:44:46,701 INFO L87 Difference]: Start difference. First operand 326 states and 438 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:46,816 INFO L93 Difference]: Finished difference Result 538 states and 702 transitions. [2021-08-06 18:44:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 18:44:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:46,818 INFO L225 Difference]: With dead ends: 538 [2021-08-06 18:44:46,818 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 18:44:46,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:44:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 18:44:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 318. [2021-08-06 18:44:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 310 states have (on average 1.3451612903225807) internal successors, (417), 317 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2021-08-06 18:44:46,825 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 40 [2021-08-06 18:44:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:46,826 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2021-08-06 18:44:46,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2021-08-06 18:44:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:46,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:46,827 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:46,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 18:44:46,827 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1405973461, now seen corresponding path program 1 times [2021-08-06 18:44:46,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:46,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777257602] [2021-08-06 18:44:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:46,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:46,869 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:46,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:46,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:46,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:46,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:46,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777257602] [2021-08-06 18:44:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777257602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:46,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701873969] [2021-08-06 18:44:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:46,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:46,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:46,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 18:44:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:47,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:44:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:47,233 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:47,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:47,480 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:47,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:47,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:47,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:47,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:47,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701873969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:47,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:47,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 18:44:47,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312445317] [2021-08-06 18:44:47,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:44:47,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:44:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:47,504 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:47,598 INFO L93 Difference]: Finished difference Result 576 states and 743 transitions. [2021-08-06 18:44:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 18:44:47,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:47,600 INFO L225 Difference]: With dead ends: 576 [2021-08-06 18:44:47,600 INFO L226 Difference]: Without dead ends: 426 [2021-08-06 18:44:47,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:44:47,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-06 18:44:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 337. [2021-08-06 18:44:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 329 states have (on average 1.3525835866261398) internal successors, (445), 336 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 445 transitions. [2021-08-06 18:44:47,607 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 445 transitions. Word has length 45 [2021-08-06 18:44:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:47,608 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 445 transitions. [2021-08-06 18:44:47,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 445 transitions. [2021-08-06 18:44:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:47,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:47,609 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:47,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:47,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:47,825 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1975051127, now seen corresponding path program 2 times [2021-08-06 18:44:47,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:47,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507977642] [2021-08-06 18:44:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:47,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:47,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:47,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:47,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:47,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:47,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,904 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:47,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:47,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507977642] [2021-08-06 18:44:47,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507977642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:47,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970201146] [2021-08-06 18:44:47,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:47,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:47,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:47,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:47,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 18:44:48,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:44:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:44:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:48,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:48,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:48,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:48,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:48,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:48,367 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:48,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970201146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:48,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:48,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 18:44:48,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816312126] [2021-08-06 18:44:48,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 18:44:48,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:48,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 18:44:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-06 18:44:48,376 INFO L87 Difference]: Start difference. First operand 337 states and 445 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:48,538 INFO L93 Difference]: Finished difference Result 1155 states and 1482 transitions. [2021-08-06 18:44:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:44:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:48,543 INFO L225 Difference]: With dead ends: 1155 [2021-08-06 18:44:48,543 INFO L226 Difference]: Without dead ends: 993 [2021-08-06 18:44:48,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:44:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-08-06 18:44:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 350. [2021-08-06 18:44:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 342 states have (on average 1.3830409356725146) internal successors, (473), 349 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 473 transitions. [2021-08-06 18:44:48,558 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 473 transitions. Word has length 45 [2021-08-06 18:44:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:48,558 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 473 transitions. [2021-08-06 18:44:48,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 473 transitions. [2021-08-06 18:44:48,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:48,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:48,559 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:48,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:48,781 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 [2021-08-06 18:44:48,781 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:48,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1931938267, now seen corresponding path program 3 times [2021-08-06 18:44:48,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:48,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159120339] [2021-08-06 18:44:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:48,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:48,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,842 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:48,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:48,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:48,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,864 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:48,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:48,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159120339] [2021-08-06 18:44:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159120339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:48,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067576116] [2021-08-06 18:44:48,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:44:48,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:48,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:48,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 18:44:49,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 18:44:49,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:49,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:44:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:49,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:49,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:49,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:49,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:49,355 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:49,356 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:49,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067576116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:49,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:49,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 18:44:49,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411250990] [2021-08-06 18:44:49,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:49,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:49,363 INFO L87 Difference]: Start difference. First operand 350 states and 473 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:49,622 INFO L93 Difference]: Finished difference Result 816 states and 1055 transitions. [2021-08-06 18:44:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:44:49,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:49,625 INFO L225 Difference]: With dead ends: 816 [2021-08-06 18:44:49,625 INFO L226 Difference]: Without dead ends: 613 [2021-08-06 18:44:49,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:44:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-06 18:44:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 363. [2021-08-06 18:44:49,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 355 states have (on average 1.3492957746478873) internal successors, (479), 362 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 479 transitions. [2021-08-06 18:44:49,635 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 479 transitions. Word has length 45 [2021-08-06 18:44:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:49,635 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 479 transitions. [2021-08-06 18:44:49,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 479 transitions. [2021-08-06 18:44:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-06 18:44:49,636 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:49,636 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:49,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:49,856 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 [2021-08-06 18:44:49,857 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:49,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1343306368, now seen corresponding path program 1 times [2021-08-06 18:44:49,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:49,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420503017] [2021-08-06 18:44:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:49,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:49,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:49,917 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:49,927 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:49,928 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:49,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:49,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420503017] [2021-08-06 18:44:49,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420503017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:49,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337912615] [2021-08-06 18:44:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:49,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:49,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:49,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:49,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 18:44:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 18:44:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:50,532 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:50,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:50,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:50,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:50,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337912615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:50,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:50,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 18:44:50,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734841357] [2021-08-06 18:44:50,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:50,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:50,554 INFO L87 Difference]: Start difference. First operand 363 states and 479 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:50,708 INFO L93 Difference]: Finished difference Result 872 states and 1116 transitions. [2021-08-06 18:44:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:44:50,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-06 18:44:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:50,711 INFO L225 Difference]: With dead ends: 872 [2021-08-06 18:44:50,711 INFO L226 Difference]: Without dead ends: 712 [2021-08-06 18:44:50,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-08-06 18:44:50,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 457. [2021-08-06 18:44:50,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 449 states have (on average 1.3273942093541202) internal successors, (596), 456 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 596 transitions. [2021-08-06 18:44:50,722 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 596 transitions. Word has length 45 [2021-08-06 18:44:50,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:50,722 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 596 transitions. [2021-08-06 18:44:50,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 596 transitions. [2021-08-06 18:44:50,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:50,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:50,723 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:50,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:50,946 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 [2021-08-06 18:44:50,946 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1255548572, now seen corresponding path program 1 times [2021-08-06 18:44:50,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:50,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797371359] [2021-08-06 18:44:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:50,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:50,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:50,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:50,992 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:50,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:51,042 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:51,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:51,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:51,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797371359] [2021-08-06 18:44:51,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797371359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:51,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466792329] [2021-08-06 18:44:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:51,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:51,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:51,077 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:51,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 18:44:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:51,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:51,439 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:51,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:51,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:51,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:51,729 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:51,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466792329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:51,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:51,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 18:44:51,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071112550] [2021-08-06 18:44:51,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 18:44:51,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 18:44:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:44:51,739 INFO L87 Difference]: Start difference. First operand 457 states and 596 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:51,872 INFO L93 Difference]: Finished difference Result 751 states and 964 transitions. [2021-08-06 18:44:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:44:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:51,875 INFO L225 Difference]: With dead ends: 751 [2021-08-06 18:44:51,875 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 18:44:51,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:44:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 18:44:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 487. [2021-08-06 18:44:51,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 479 states have (on average 1.3277661795407099) internal successors, (636), 486 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 636 transitions. [2021-08-06 18:44:51,886 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 636 transitions. Word has length 55 [2021-08-06 18:44:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:51,886 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 636 transitions. [2021-08-06 18:44:51,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 636 transitions. [2021-08-06 18:44:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:51,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:51,887 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:51,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:52,105 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 [2021-08-06 18:44:52,105 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:52,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1912973754, now seen corresponding path program 2 times [2021-08-06 18:44:52,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:52,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592332142] [2021-08-06 18:44:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:52,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:52,138 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:52,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:44:52,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:52,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:44:52,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:52,204 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:44:52,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:52,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592332142] [2021-08-06 18:44:52,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592332142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:52,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033711715] [2021-08-06 18:44:52,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:52,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:52,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:52,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:52,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 18:44:52,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:44:52,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:52,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:52,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:52,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:53,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:53,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:53,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:53,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:44:53,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033711715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:53,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:53,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-08-06 18:44:53,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003892078] [2021-08-06 18:44:53,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:44:53,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:44:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:44:53,044 INFO L87 Difference]: Start difference. First operand 487 states and 636 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:53,253 INFO L93 Difference]: Finished difference Result 1232 states and 1563 transitions. [2021-08-06 18:44:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:44:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:53,258 INFO L225 Difference]: With dead ends: 1232 [2021-08-06 18:44:53,258 INFO L226 Difference]: Without dead ends: 1024 [2021-08-06 18:44:53,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:44:53,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-08-06 18:44:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 502. [2021-08-06 18:44:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 494 states have (on average 1.3380566801619433) internal successors, (661), 501 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 661 transitions. [2021-08-06 18:44:53,272 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 661 transitions. Word has length 55 [2021-08-06 18:44:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:53,272 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 661 transitions. [2021-08-06 18:44:53,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 661 transitions. [2021-08-06 18:44:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:53,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:53,273 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:53,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:53,489 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 [2021-08-06 18:44:53,489 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1367396072, now seen corresponding path program 3 times [2021-08-06 18:44:53,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:53,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164720147] [2021-08-06 18:44:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:53,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:53,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:53,548 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:53,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:53,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:53,588 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:53,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:53,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:53,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164720147] [2021-08-06 18:44:53,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164720147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:53,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38891431] [2021-08-06 18:44:53,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:44:53,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:53,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:53,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:53,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 18:44:53,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:44:53,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:53,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:54,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:54,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:54,305 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:54,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:54,319 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:54,320 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38891431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:54,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:54,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 18:44:54,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480150638] [2021-08-06 18:44:54,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 18:44:54,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 18:44:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:44:54,327 INFO L87 Difference]: Start difference. First operand 502 states and 661 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:54,504 INFO L93 Difference]: Finished difference Result 943 states and 1199 transitions. [2021-08-06 18:44:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:44:54,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:54,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:54,508 INFO L225 Difference]: With dead ends: 943 [2021-08-06 18:44:54,508 INFO L226 Difference]: Without dead ends: 793 [2021-08-06 18:44:54,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:44:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-08-06 18:44:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 502. [2021-08-06 18:44:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 494 states have (on average 1.3380566801619433) internal successors, (661), 501 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:54,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 661 transitions. [2021-08-06 18:44:54,519 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 661 transitions. Word has length 55 [2021-08-06 18:44:54,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:54,519 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 661 transitions. [2021-08-06 18:44:54,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 661 transitions. [2021-08-06 18:44:54,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:54,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:54,520 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:54,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:54,736 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 [2021-08-06 18:44:54,737 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:54,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1088516634, now seen corresponding path program 4 times [2021-08-06 18:44:54,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:54,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535626137] [2021-08-06 18:44:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:54,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:54,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:54,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:54,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:54,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:54,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:54,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:54,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:54,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535626137] [2021-08-06 18:44:54,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535626137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:54,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411201279] [2021-08-06 18:44:54,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:44:54,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:54,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:54,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:54,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 18:44:55,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:44:55,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:55,354 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:55,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:55,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:55,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:55,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:55,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411201279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:55,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:55,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 18:44:55,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552746549] [2021-08-06 18:44:55,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 18:44:55,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 18:44:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-06 18:44:55,461 INFO L87 Difference]: Start difference. First operand 502 states and 661 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:55,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:55,709 INFO L93 Difference]: Finished difference Result 1559 states and 1992 transitions. [2021-08-06 18:44:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:44:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:55,713 INFO L225 Difference]: With dead ends: 1559 [2021-08-06 18:44:55,713 INFO L226 Difference]: Without dead ends: 1354 [2021-08-06 18:44:55,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:44:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-08-06 18:44:55,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 515. [2021-08-06 18:44:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 507 states have (on average 1.3609467455621302) internal successors, (690), 514 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 690 transitions. [2021-08-06 18:44:55,730 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 690 transitions. Word has length 55 [2021-08-06 18:44:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:55,730 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 690 transitions. [2021-08-06 18:44:55,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 690 transitions. [2021-08-06 18:44:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:55,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:55,733 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:55,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:55,960 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 [2021-08-06 18:44:55,961 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1131629494, now seen corresponding path program 5 times [2021-08-06 18:44:55,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:55,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527378907] [2021-08-06 18:44:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:55,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:56,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:56,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:56,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:56,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:56,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:56,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:56,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:56,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527378907] [2021-08-06 18:44:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527378907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:56,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320711312] [2021-08-06 18:44:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:44:56,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:56,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:56,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 18:44:56,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:44:56,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:44:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:56,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:56,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:44:56,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:56,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:56,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:56,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:56,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320711312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:56,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:56,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 18:44:56,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360311729] [2021-08-06 18:44:56,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:44:56,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:44:56,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:44:56,767 INFO L87 Difference]: Start difference. First operand 515 states and 690 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:57,074 INFO L93 Difference]: Finished difference Result 1210 states and 1536 transitions. [2021-08-06 18:44:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:44:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:57,077 INFO L225 Difference]: With dead ends: 1210 [2021-08-06 18:44:57,077 INFO L226 Difference]: Without dead ends: 1007 [2021-08-06 18:44:57,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-06 18:44:57,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-08-06 18:44:57,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 527. [2021-08-06 18:44:57,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 519 states have (on average 1.3352601156069364) internal successors, (693), 526 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 693 transitions. [2021-08-06 18:44:57,089 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 693 transitions. Word has length 55 [2021-08-06 18:44:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:57,089 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 693 transitions. [2021-08-06 18:44:57,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:57,089 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 693 transitions. [2021-08-06 18:44:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:57,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:57,090 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:57,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:57,303 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 [2021-08-06 18:44:57,303 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:57,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1976857068, now seen corresponding path program 6 times [2021-08-06 18:44:57,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:57,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087680990] [2021-08-06 18:44:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:57,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:57,337 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:57,338 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:57,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:57,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:57,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:57,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:44:57,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:57,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087680990] [2021-08-06 18:44:57,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087680990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:57,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662430551] [2021-08-06 18:44:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:44:57,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:57,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:57,405 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:57,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 18:44:57,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 18:44:57,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:44:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:44:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:57,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:57,946 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:58,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:58,172 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:58,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:58,183 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:44:58,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662430551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:58,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:58,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 18:44:58,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589005866] [2021-08-06 18:44:58,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:58,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:58,190 INFO L87 Difference]: Start difference. First operand 527 states and 693 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:58,300 INFO L93 Difference]: Finished difference Result 996 states and 1277 transitions. [2021-08-06 18:44:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 18:44:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:58,303 INFO L225 Difference]: With dead ends: 996 [2021-08-06 18:44:58,303 INFO L226 Difference]: Without dead ends: 843 [2021-08-06 18:44:58,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-06 18:44:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-08-06 18:44:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 497. [2021-08-06 18:44:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 489 states have (on average 1.3456032719836402) internal successors, (658), 496 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 658 transitions. [2021-08-06 18:44:58,314 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 658 transitions. Word has length 55 [2021-08-06 18:44:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:58,314 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 658 transitions. [2021-08-06 18:44:58,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 658 transitions. [2021-08-06 18:44:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:58,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:58,316 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:58,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:58,541 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 [2021-08-06 18:44:58,541 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash -643963744, now seen corresponding path program 7 times [2021-08-06 18:44:58,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:58,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087741077] [2021-08-06 18:44:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:58,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:58,593 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:58,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:44:58,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:58,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:44:58,610 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:58,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:44:58,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:58,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087741077] [2021-08-06 18:44:58,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087741077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:58,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584619314] [2021-08-06 18:44:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:44:58,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:58,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:58,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 18:44:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:58,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 18:44:58,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:44:59,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:59,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:44:59,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:59,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:44:59,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:59,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:44:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:44:59,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584619314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:59,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:44:59,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 18:44:59,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140394189] [2021-08-06 18:44:59,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 18:44:59,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:44:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 18:44:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-06 18:44:59,318 INFO L87 Difference]: Start difference. First operand 497 states and 658 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:44:59,473 INFO L93 Difference]: Finished difference Result 1428 states and 1838 transitions. [2021-08-06 18:44:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 18:44:59,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:44:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:44:59,477 INFO L225 Difference]: With dead ends: 1428 [2021-08-06 18:44:59,477 INFO L226 Difference]: Without dead ends: 1260 [2021-08-06 18:44:59,477 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-08-06 18:44:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-08-06 18:44:59,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 466. [2021-08-06 18:44:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 458 states have (on average 1.3777292576419213) internal successors, (631), 465 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 631 transitions. [2021-08-06 18:44:59,488 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 631 transitions. Word has length 55 [2021-08-06 18:44:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:44:59,488 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 631 transitions. [2021-08-06 18:44:59,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:44:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 631 transitions. [2021-08-06 18:44:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-06 18:44:59,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:44:59,489 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:44:59,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 18:44:59,714 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 [2021-08-06 18:44:59,715 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:44:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:44:59,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1138710351, now seen corresponding path program 8 times [2021-08-06 18:44:59,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:44:59,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202882490] [2021-08-06 18:44:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:44:59,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:44:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:44:59,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:59,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:44:59,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:59,797 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:44:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:44:59,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:44:59,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202882490] [2021-08-06 18:44:59,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202882490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:44:59,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914320037] [2021-08-06 18:44:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:44:59,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:44:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:44:59,823 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:44:59,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 18:45:00,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:00,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 18:45:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:00,494 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:00,495 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:00,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:00,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:00,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914320037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:00,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:00,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-06 18:45:00,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144059734] [2021-08-06 18:45:00,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:00,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:00,517 INFO L87 Difference]: Start difference. First operand 466 states and 631 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:00,763 INFO L93 Difference]: Finished difference Result 1121 states and 1432 transitions. [2021-08-06 18:45:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:45:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-06 18:45:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:00,766 INFO L225 Difference]: With dead ends: 1121 [2021-08-06 18:45:00,766 INFO L226 Difference]: Without dead ends: 918 [2021-08-06 18:45:00,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-08-06 18:45:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-08-06 18:45:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 577. [2021-08-06 18:45:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 569 states have (on average 1.3356766256590509) internal successors, (760), 576 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 760 transitions. [2021-08-06 18:45:00,776 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 760 transitions. Word has length 55 [2021-08-06 18:45:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 760 transitions. [2021-08-06 18:45:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 760 transitions. [2021-08-06 18:45:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:00,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:00,777 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:00,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:01,011 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 [2021-08-06 18:45:01,011 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:01,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:01,011 INFO L82 PathProgramCache]: Analyzing trace with hash 2043402291, now seen corresponding path program 9 times [2021-08-06 18:45:01,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:01,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61020958] [2021-08-06 18:45:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:01,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:01,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:01,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:01,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:01,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:01,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:01,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:01,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:01,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61020958] [2021-08-06 18:45:01,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61020958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:01,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583532626] [2021-08-06 18:45:01,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:01,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:01,149 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:01,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 18:45:01,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:45:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:01,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:01,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:02,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:02,007 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:02,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:02,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:02,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583532626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:02,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:02,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:02,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952222472] [2021-08-06 18:45:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:02,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:02,024 INFO L87 Difference]: Start difference. First operand 577 states and 760 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:02,173 INFO L93 Difference]: Finished difference Result 921 states and 1188 transitions. [2021-08-06 18:45:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:45:02,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:02,176 INFO L225 Difference]: With dead ends: 921 [2021-08-06 18:45:02,177 INFO L226 Difference]: Without dead ends: 771 [2021-08-06 18:45:02,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-08-06 18:45:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-06 18:45:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 607. [2021-08-06 18:45:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 599 states have (on average 1.335559265442404) internal successors, (800), 606 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 800 transitions. [2021-08-06 18:45:02,187 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 800 transitions. Word has length 65 [2021-08-06 18:45:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:02,187 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 800 transitions. [2021-08-06 18:45:02,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 800 transitions. [2021-08-06 18:45:02,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:02,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:02,188 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:02,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:02,404 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 [2021-08-06 18:45:02,405 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1670194955, now seen corresponding path program 10 times [2021-08-06 18:45:02,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:02,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022992858] [2021-08-06 18:45:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:02,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:02,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:02,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:02,449 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:02,450 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:02,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:02,527 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:02,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:02,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022992858] [2021-08-06 18:45:02,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022992858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:02,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232180423] [2021-08-06 18:45:02,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:02,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:02,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:02,557 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:02,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 18:45:03,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:03,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:03,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:03,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:03,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:03,618 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:03,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:03,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:03,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232180423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:03,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:03,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-06 18:45:03,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977011411] [2021-08-06 18:45:03,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:03,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:03,632 INFO L87 Difference]: Start difference. First operand 607 states and 800 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:03,841 INFO L93 Difference]: Finished difference Result 1502 states and 1907 transitions. [2021-08-06 18:45:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:45:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:03,845 INFO L225 Difference]: With dead ends: 1502 [2021-08-06 18:45:03,845 INFO L226 Difference]: Without dead ends: 1294 [2021-08-06 18:45:03,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-08-06 18:45:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-06 18:45:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 622. [2021-08-06 18:45:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 614 states have (on average 1.3436482084690553) internal successors, (825), 621 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 825 transitions. [2021-08-06 18:45:03,857 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 825 transitions. Word has length 65 [2021-08-06 18:45:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:03,857 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 825 transitions. [2021-08-06 18:45:03,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 825 transitions. [2021-08-06 18:45:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:03,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:03,858 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:03,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:04,075 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 [2021-08-06 18:45:04,075 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -160555289, now seen corresponding path program 11 times [2021-08-06 18:45:04,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:04,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863068111] [2021-08-06 18:45:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:04,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:04,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:04,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:04,122 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:04,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:04,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:04,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:04,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:04,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863068111] [2021-08-06 18:45:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863068111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:04,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010548632] [2021-08-06 18:45:04,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:04,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:04,209 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:04,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 18:45:04,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:45:04,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:04,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:04,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:04,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:04,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:05,166 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:05,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:05,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:05,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:05,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010548632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:05,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:05,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:05,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141465464] [2021-08-06 18:45:05,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:05,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:05,197 INFO L87 Difference]: Start difference. First operand 622 states and 825 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:05,384 INFO L93 Difference]: Finished difference Result 1163 states and 1483 transitions. [2021-08-06 18:45:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:45:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:05,388 INFO L225 Difference]: With dead ends: 1163 [2021-08-06 18:45:05,388 INFO L226 Difference]: Without dead ends: 1013 [2021-08-06 18:45:05,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:45:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-06 18:45:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 622. [2021-08-06 18:45:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 614 states have (on average 1.3436482084690553) internal successors, (825), 621 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 825 transitions. [2021-08-06 18:45:05,398 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 825 transitions. Word has length 65 [2021-08-06 18:45:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:05,399 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 825 transitions. [2021-08-06 18:45:05,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 825 transitions. [2021-08-06 18:45:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:05,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:05,400 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:05,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:05,624 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 [2021-08-06 18:45:05,625 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1317239447, now seen corresponding path program 12 times [2021-08-06 18:45:05,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:05,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261265030] [2021-08-06 18:45:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:05,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:05,694 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:05,695 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:05,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:05,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:05,736 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:05,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:05,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:05,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261265030] [2021-08-06 18:45:05,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261265030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:05,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985419149] [2021-08-06 18:45:05,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:05,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:05,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:05,769 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 18:45:06,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:45:06,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:06,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:06,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:06,514 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:06,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:06,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:06,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:06,679 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:06,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985419149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:06,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:06,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:06,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643438818] [2021-08-06 18:45:06,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:06,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:06,685 INFO L87 Difference]: Start difference. First operand 622 states and 825 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:06,909 INFO L93 Difference]: Finished difference Result 1323 states and 1661 transitions. [2021-08-06 18:45:06,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:45:06,910 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:06,913 INFO L225 Difference]: With dead ends: 1323 [2021-08-06 18:45:06,913 INFO L226 Difference]: Without dead ends: 1173 [2021-08-06 18:45:06,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:45:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-08-06 18:45:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 622. [2021-08-06 18:45:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 614 states have (on average 1.3436482084690553) internal successors, (825), 621 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:06,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 825 transitions. [2021-08-06 18:45:06,922 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 825 transitions. Word has length 65 [2021-08-06 18:45:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:06,922 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 825 transitions. [2021-08-06 18:45:06,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:06,922 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 825 transitions. [2021-08-06 18:45:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:06,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:06,923 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:06,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:07,146 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 [2021-08-06 18:45:07,146 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:07,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1138673259, now seen corresponding path program 13 times [2021-08-06 18:45:07,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:07,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115240957] [2021-08-06 18:45:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:07,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:07,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:07,209 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:07,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:07,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:07,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:07,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:07,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:07,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115240957] [2021-08-06 18:45:07,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115240957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:07,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089412340] [2021-08-06 18:45:07,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:07,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:07,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:07,265 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:07,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 18:45:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:08,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:08,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:08,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:08,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:08,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:08,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:08,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089412340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:08,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:08,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 18:45:08,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926979412] [2021-08-06 18:45:08,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:08,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:08,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:08,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:08,183 INFO L87 Difference]: Start difference. First operand 622 states and 825 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:08,462 INFO L93 Difference]: Finished difference Result 1809 states and 2296 transitions. [2021-08-06 18:45:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:45:08,463 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:08,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:08,466 INFO L225 Difference]: With dead ends: 1809 [2021-08-06 18:45:08,466 INFO L226 Difference]: Without dead ends: 1604 [2021-08-06 18:45:08,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:45:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-08-06 18:45:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 635. [2021-08-06 18:45:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 627 states have (on average 1.3620414673046253) internal successors, (854), 634 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 854 transitions. [2021-08-06 18:45:08,478 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 854 transitions. Word has length 65 [2021-08-06 18:45:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:08,478 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 854 transitions. [2021-08-06 18:45:08,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 854 transitions. [2021-08-06 18:45:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:08,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:08,479 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:08,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:08,695 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 [2021-08-06 18:45:08,695 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1181786119, now seen corresponding path program 14 times [2021-08-06 18:45:08,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:08,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326261430] [2021-08-06 18:45:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:08,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:08,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:08,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:08,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:08,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:08,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:08,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:08,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:08,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326261430] [2021-08-06 18:45:08,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326261430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:08,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134976883] [2021-08-06 18:45:08,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:08,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:08,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:08,821 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:08,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 18:45:09,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:09,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:09,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:09,752 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:09,754 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:09,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:09,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:09,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:09,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:09,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134976883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:09,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:09,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-06 18:45:09,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219711168] [2021-08-06 18:45:09,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:09,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:09,795 INFO L87 Difference]: Start difference. First operand 635 states and 854 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:10,194 INFO L93 Difference]: Finished difference Result 1460 states and 1840 transitions. [2021-08-06 18:45:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:45:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:10,199 INFO L225 Difference]: With dead ends: 1460 [2021-08-06 18:45:10,199 INFO L226 Difference]: Without dead ends: 1257 [2021-08-06 18:45:10,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 18:45:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-08-06 18:45:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 647. [2021-08-06 18:45:10,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 639 states have (on average 1.3411580594679187) internal successors, (857), 646 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 857 transitions. [2021-08-06 18:45:10,211 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 857 transitions. Word has length 65 [2021-08-06 18:45:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:10,211 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 857 transitions. [2021-08-06 18:45:10,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 857 transitions. [2021-08-06 18:45:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:10,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:10,212 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:10,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:10,428 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 [2021-08-06 18:45:10,429 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:10,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:10,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1494016741, now seen corresponding path program 15 times [2021-08-06 18:45:10,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:10,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848031120] [2021-08-06 18:45:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:10,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:10,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:10,468 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:10,473 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:10,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:10,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:10,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:10,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:10,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848031120] [2021-08-06 18:45:10,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848031120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:10,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671001019] [2021-08-06 18:45:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:10,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:10,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:10,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 18:45:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 18:45:11,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:11,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:45:11,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:11,334 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:11,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:11,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:11,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:11,602 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:11,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:11,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671001019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:11,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:11,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 18:45:11,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100680503] [2021-08-06 18:45:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:11,608 INFO L87 Difference]: Start difference. First operand 647 states and 857 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:11,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:11,758 INFO L93 Difference]: Finished difference Result 1266 states and 1621 transitions. [2021-08-06 18:45:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 18:45:11,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:11,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:11,761 INFO L225 Difference]: With dead ends: 1266 [2021-08-06 18:45:11,761 INFO L226 Difference]: Without dead ends: 1113 [2021-08-06 18:45:11,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-06 18:45:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-06 18:45:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 617. [2021-08-06 18:45:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 609 states have (on average 1.3497536945812807) internal successors, (822), 616 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 822 transitions. [2021-08-06 18:45:11,769 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 822 transitions. Word has length 65 [2021-08-06 18:45:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:11,769 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 822 transitions. [2021-08-06 18:45:11,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 822 transitions. [2021-08-06 18:45:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:11,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:11,770 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:11,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:11,996 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 [2021-08-06 18:45:11,997 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:11,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1021478287, now seen corresponding path program 16 times [2021-08-06 18:45:11,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:11,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122487545] [2021-08-06 18:45:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:11,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:12,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:12,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:12,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:12,042 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:12,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:12,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:12,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:12,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122487545] [2021-08-06 18:45:12,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122487545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:12,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930485565] [2021-08-06 18:45:12,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:12,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:12,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:12,105 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:12,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 18:45:12,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:12,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:45:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:12,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:12,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:13,144 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:13,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:13,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:13,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:13,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930485565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:13,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:13,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 18:45:13,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794074006] [2021-08-06 18:45:13,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:13,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:13,166 INFO L87 Difference]: Start difference. First operand 617 states and 822 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:13,327 INFO L93 Difference]: Finished difference Result 1231 states and 1566 transitions. [2021-08-06 18:45:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:45:13,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:13,330 INFO L225 Difference]: With dead ends: 1231 [2021-08-06 18:45:13,330 INFO L226 Difference]: Without dead ends: 1078 [2021-08-06 18:45:13,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-06 18:45:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-06 18:45:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 587. [2021-08-06 18:45:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 579 states have (on average 1.3506044905008636) internal successors, (782), 586 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 782 transitions. [2021-08-06 18:45:13,339 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 782 transitions. Word has length 65 [2021-08-06 18:45:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:13,339 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 782 transitions. [2021-08-06 18:45:13,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 782 transitions. [2021-08-06 18:45:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:13,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:13,341 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:13,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 18:45:13,541 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 [2021-08-06 18:45:13,541 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1281723055, now seen corresponding path program 17 times [2021-08-06 18:45:13,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:13,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120416806] [2021-08-06 18:45:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:13,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:13,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:13,596 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:13,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:13,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:13,613 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:13,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:13,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:13,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120416806] [2021-08-06 18:45:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120416806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:13,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369308603] [2021-08-06 18:45:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:13,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:13,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:13,638 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:13,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 18:45:14,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 18:45:14,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:14,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:45:14,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:14,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:14,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:14,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:14,627 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:14,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:14,636 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:14,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369308603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:14,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:14,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 18:45:14,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461422355] [2021-08-06 18:45:14,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 18:45:14,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 18:45:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 18:45:14,643 INFO L87 Difference]: Start difference. First operand 587 states and 782 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:14,836 INFO L93 Difference]: Finished difference Result 1628 states and 2082 transitions. [2021-08-06 18:45:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:45:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:14,840 INFO L225 Difference]: With dead ends: 1628 [2021-08-06 18:45:14,840 INFO L226 Difference]: Without dead ends: 1460 [2021-08-06 18:45:14,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:45:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-06 18:45:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 556. [2021-08-06 18:45:14,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 548 states have (on average 1.3777372262773722) internal successors, (755), 555 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 755 transitions. [2021-08-06 18:45:14,848 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 755 transitions. Word has length 65 [2021-08-06 18:45:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:14,849 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 755 transitions. [2021-08-06 18:45:14,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 755 transitions. [2021-08-06 18:45:14,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-06 18:45:14,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:14,850 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:14,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 18:45:15,060 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 [2021-08-06 18:45:15,061 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1230570146, now seen corresponding path program 18 times [2021-08-06 18:45:15,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:15,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146577906] [2021-08-06 18:45:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:15,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:15,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:15,142 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 38.9 percent of original size [2021-08-06 18:45:15,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:15,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 46.7 percent of original size [2021-08-06 18:45:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:15,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:15,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146577906] [2021-08-06 18:45:15,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146577906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:15,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433454724] [2021-08-06 18:45:15,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:15,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:15,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:15,189 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:15,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 18:45:15,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 18:45:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 18:45:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:16,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:16,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:16,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:16,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:16,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433454724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:16,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:16,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-06 18:45:16,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932116694] [2021-08-06 18:45:16,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:16,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:16,251 INFO L87 Difference]: Start difference. First operand 556 states and 755 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:16,559 INFO L93 Difference]: Finished difference Result 1321 states and 1676 transitions. [2021-08-06 18:45:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 18:45:16,559 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-08-06 18:45:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:16,563 INFO L225 Difference]: With dead ends: 1321 [2021-08-06 18:45:16,563 INFO L226 Difference]: Without dead ends: 1118 [2021-08-06 18:45:16,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:45:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-08-06 18:45:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 697. [2021-08-06 18:45:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 689 states have (on average 1.3410740203193032) internal successors, (924), 696 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 924 transitions. [2021-08-06 18:45:16,571 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 924 transitions. Word has length 65 [2021-08-06 18:45:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:16,571 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 924 transitions. [2021-08-06 18:45:16,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 924 transitions. [2021-08-06 18:45:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:16,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:16,573 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:16,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 18:45:16,773 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 [2021-08-06 18:45:16,773 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash -143335358, now seen corresponding path program 19 times [2021-08-06 18:45:16,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:16,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388419442] [2021-08-06 18:45:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:16,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:16,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:16,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:16,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:16,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:16,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:16,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:16,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:16,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388419442] [2021-08-06 18:45:16,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388419442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:16,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561998344] [2021-08-06 18:45:16,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:16,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:16,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:16,923 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:16,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 18:45:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:17,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:17,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:17,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:17,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:18,138 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:18,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:18,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:18,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:18,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561998344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:18,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:18,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-06 18:45:18,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094464862] [2021-08-06 18:45:18,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:18,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:18,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:18,154 INFO L87 Difference]: Start difference. First operand 697 states and 924 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:18,322 INFO L93 Difference]: Finished difference Result 1091 states and 1412 transitions. [2021-08-06 18:45:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:45:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:18,325 INFO L225 Difference]: With dead ends: 1091 [2021-08-06 18:45:18,325 INFO L226 Difference]: Without dead ends: 941 [2021-08-06 18:45:18,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:45:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-06 18:45:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 727. [2021-08-06 18:45:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 719 states have (on average 1.3407510431154381) internal successors, (964), 726 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 964 transitions. [2021-08-06 18:45:18,335 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 964 transitions. Word has length 75 [2021-08-06 18:45:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:18,336 INFO L470 AbstractCegarLoop]: Abstraction has 727 states and 964 transitions. [2021-08-06 18:45:18,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 964 transitions. [2021-08-06 18:45:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:18,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:18,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:18,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:18,560 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 [2021-08-06 18:45:18,561 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:18,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:18,561 INFO L82 PathProgramCache]: Analyzing trace with hash 536408860, now seen corresponding path program 20 times [2021-08-06 18:45:18,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:18,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078658707] [2021-08-06 18:45:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:18,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:18,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:18,591 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:18,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:18,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:18,695 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:18,696 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:18,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:18,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078658707] [2021-08-06 18:45:18,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078658707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:18,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843316581] [2021-08-06 18:45:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:18,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:18,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:18,733 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:18,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 18:45:19,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:19,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:19,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:19,764 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:19,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:20,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:20,130 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:20,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:20,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:20,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843316581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:20,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:20,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-08-06 18:45:20,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285999364] [2021-08-06 18:45:20,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:45:20,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:20,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:45:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:45:20,145 INFO L87 Difference]: Start difference. First operand 727 states and 964 transitions. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:20,396 INFO L93 Difference]: Finished difference Result 1772 states and 2251 transitions. [2021-08-06 18:45:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:45:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:20,400 INFO L225 Difference]: With dead ends: 1772 [2021-08-06 18:45:20,400 INFO L226 Difference]: Without dead ends: 1564 [2021-08-06 18:45:20,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:45:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-08-06 18:45:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 742. [2021-08-06 18:45:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-06 18:45:20,411 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-06 18:45:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-06 18:45:20,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-06 18:45:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:20,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:20,412 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:20,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 18:45:20,616 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 [2021-08-06 18:45:20,617 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:20,617 INFO L82 PathProgramCache]: Analyzing trace with hash -884648458, now seen corresponding path program 21 times [2021-08-06 18:45:20,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:20,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595645433] [2021-08-06 18:45:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:20,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:20,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:20,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:20,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:20,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:20,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:20,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:20,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595645433] [2021-08-06 18:45:20,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595645433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:20,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259498026] [2021-08-06 18:45:20,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:20,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:20,766 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:20,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 18:45:21,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:45:21,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:21,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:21,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:21,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:21,794 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:22,084 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:22,085 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:22,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:22,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:22,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259498026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:22,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:22,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-06 18:45:22,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791629397] [2021-08-06 18:45:22,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:22,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:22,099 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:22,312 INFO L93 Difference]: Finished difference Result 1383 states and 1767 transitions. [2021-08-06 18:45:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 18:45:22,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:22,315 INFO L225 Difference]: With dead ends: 1383 [2021-08-06 18:45:22,315 INFO L226 Difference]: Without dead ends: 1233 [2021-08-06 18:45:22,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:45:22,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-08-06 18:45:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 742. [2021-08-06 18:45:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-06 18:45:22,325 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-06 18:45:22,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:22,325 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-06 18:45:22,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:22,325 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-06 18:45:22,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:22,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:22,326 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:22,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 18:45:22,527 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 [2021-08-06 18:45:22,527 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1211040248, now seen corresponding path program 22 times [2021-08-06 18:45:22,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:22,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375776326] [2021-08-06 18:45:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:22,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:22,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:22,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:22,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:22,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:22,642 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:22,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:22,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:22,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375776326] [2021-08-06 18:45:22,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375776326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:22,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696972807] [2021-08-06 18:45:22,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:22,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:22,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:22,677 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:22,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 18:45:23,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:23,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:23,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:23,757 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:23,758 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:23,978 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:23,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:23,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:23,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:23,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696972807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:23,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:23,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-06 18:45:23,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52890282] [2021-08-06 18:45:23,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:23,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:23,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:23,993 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:24,243 INFO L93 Difference]: Finished difference Result 1618 states and 2035 transitions. [2021-08-06 18:45:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:24,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:24,246 INFO L225 Difference]: With dead ends: 1618 [2021-08-06 18:45:24,246 INFO L226 Difference]: Without dead ends: 1468 [2021-08-06 18:45:24,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-08-06 18:45:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-08-06 18:45:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 742. [2021-08-06 18:45:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-06 18:45:24,258 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-06 18:45:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:24,258 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-06 18:45:24,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-06 18:45:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:24,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:24,259 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:24,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 18:45:24,460 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 [2021-08-06 18:45:24,460 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:24,460 INFO L82 PathProgramCache]: Analyzing trace with hash 54356090, now seen corresponding path program 23 times [2021-08-06 18:45:24,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:24,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596830743] [2021-08-06 18:45:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:24,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:24,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:24,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:24,533 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:24,534 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:24,566 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:24,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:24,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:24,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596830743] [2021-08-06 18:45:24,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596830743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:24,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151774124] [2021-08-06 18:45:24,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:24,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:24,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:24,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:24,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 18:45:25,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:45:25,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:25,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:25,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:25,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:25,763 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:25,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:25,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:25,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:25,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:25,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151774124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:25,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:25,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-06 18:45:25,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893788892] [2021-08-06 18:45:25,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:25,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:25,909 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:26,204 INFO L93 Difference]: Finished difference Result 1573 states and 1965 transitions. [2021-08-06 18:45:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:45:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:26,207 INFO L225 Difference]: With dead ends: 1573 [2021-08-06 18:45:26,207 INFO L226 Difference]: Without dead ends: 1423 [2021-08-06 18:45:26,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 18:45:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-08-06 18:45:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 742. [2021-08-06 18:45:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3474114441416893) internal successors, (989), 741 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 989 transitions. [2021-08-06 18:45:26,225 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 989 transitions. Word has length 75 [2021-08-06 18:45:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:26,225 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 989 transitions. [2021-08-06 18:45:26,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 989 transitions. [2021-08-06 18:45:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:26,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:26,226 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:26,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:26,446 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 [2021-08-06 18:45:26,446 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:26,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1784698500, now seen corresponding path program 24 times [2021-08-06 18:45:26,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:26,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025922859] [2021-08-06 18:45:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:26,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:26,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:26,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:26,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:26,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:26,546 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:26,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:26,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:26,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025922859] [2021-08-06 18:45:26,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025922859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:26,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998922859] [2021-08-06 18:45:26,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:26,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:26,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:26,578 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:26,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 18:45:27,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:45:27,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:27,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:27,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:27,833 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:27,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:27,883 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:27,884 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:27,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:27,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:27,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998922859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:27,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:27,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-06 18:45:27,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56805764] [2021-08-06 18:45:27,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 18:45:27,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:27,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 18:45:27,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-06 18:45:27,899 INFO L87 Difference]: Start difference. First operand 742 states and 989 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:28,227 INFO L93 Difference]: Finished difference Result 2059 states and 2600 transitions. [2021-08-06 18:45:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:45:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:28,230 INFO L225 Difference]: With dead ends: 2059 [2021-08-06 18:45:28,230 INFO L226 Difference]: Without dead ends: 1854 [2021-08-06 18:45:28,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:45:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-06 18:45:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 755. [2021-08-06 18:45:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 747 states have (on average 1.3627844712182062) internal successors, (1018), 754 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1018 transitions. [2021-08-06 18:45:28,239 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1018 transitions. Word has length 75 [2021-08-06 18:45:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:28,240 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1018 transitions. [2021-08-06 18:45:28,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1018 transitions. [2021-08-06 18:45:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:28,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:28,241 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:28,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 18:45:28,444 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 [2021-08-06 18:45:28,445 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:28,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:28,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1741585640, now seen corresponding path program 25 times [2021-08-06 18:45:28,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:28,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602353378] [2021-08-06 18:45:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:28,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:28,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:28,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:28,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:28,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:28,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:28,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:28,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:28,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602353378] [2021-08-06 18:45:28,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602353378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:28,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433276481] [2021-08-06 18:45:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:28,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:28,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:28,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 18:45:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:29,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:29,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:29,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:29,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:29,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:29,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:29,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:29,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433276481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:29,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:29,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:29,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662466673] [2021-08-06 18:45:29,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:29,966 INFO L87 Difference]: Start difference. First operand 755 states and 1018 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:30,405 INFO L93 Difference]: Finished difference Result 1421 states and 1777 transitions. [2021-08-06 18:45:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:45:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:30,407 INFO L225 Difference]: With dead ends: 1421 [2021-08-06 18:45:30,407 INFO L226 Difference]: Without dead ends: 1298 [2021-08-06 18:45:30,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 18:45:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-08-06 18:45:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 772. [2021-08-06 18:45:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 764 states have (on average 1.350785340314136) internal successors, (1032), 771 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1032 transitions. [2021-08-06 18:45:30,418 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1032 transitions. Word has length 75 [2021-08-06 18:45:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:30,418 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 1032 transitions. [2021-08-06 18:45:30,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1032 transitions. [2021-08-06 18:45:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:30,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:30,420 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:30,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:30,624 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 [2021-08-06 18:45:30,625 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:30,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1544234614, now seen corresponding path program 26 times [2021-08-06 18:45:30,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:30,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360407889] [2021-08-06 18:45:30,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:30,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:30,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:30,663 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:30,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:30,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:30,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:30,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:30,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:30,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360407889] [2021-08-06 18:45:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360407889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:30,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677059270] [2021-08-06 18:45:30,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:30,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:30,768 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:30,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 18:45:31,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:31,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:31,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:31,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:31,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:31,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:32,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:32,259 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:32,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:32,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:32,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677059270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:32,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:32,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-06 18:45:32,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937756568] [2021-08-06 18:45:32,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:32,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:32,273 INFO L87 Difference]: Start difference. First operand 772 states and 1032 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:32,432 INFO L93 Difference]: Finished difference Result 1541 states and 1976 transitions. [2021-08-06 18:45:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 18:45:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:32,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:32,434 INFO L225 Difference]: With dead ends: 1541 [2021-08-06 18:45:32,434 INFO L226 Difference]: Without dead ends: 1388 [2021-08-06 18:45:32,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 18:45:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-08-06 18:45:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 742. [2021-08-06 18:45:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 734 states have (on average 1.3583106267029972) internal successors, (997), 741 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 997 transitions. [2021-08-06 18:45:32,442 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 997 transitions. Word has length 75 [2021-08-06 18:45:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:32,442 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 997 transitions. [2021-08-06 18:45:32,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 997 transitions. [2021-08-06 18:45:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:32,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:32,443 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:32,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:32,668 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 [2021-08-06 18:45:32,669 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:32,669 INFO L82 PathProgramCache]: Analyzing trace with hash -996360446, now seen corresponding path program 27 times [2021-08-06 18:45:32,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:32,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237082551] [2021-08-06 18:45:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:32,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:32,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:32,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:32,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:32,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:32,766 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:32,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:32,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:32,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237082551] [2021-08-06 18:45:32,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237082551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:32,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907305306] [2021-08-06 18:45:32,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:32,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:32,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:32,793 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:32,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 18:45:33,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 18:45:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:34,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:34,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:34,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:34,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:34,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:34,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907305306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:34,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:34,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-06 18:45:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011404791] [2021-08-06 18:45:34,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:34,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:34,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:34,317 INFO L87 Difference]: Start difference. First operand 742 states and 997 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:34,501 INFO L93 Difference]: Finished difference Result 1506 states and 1921 transitions. [2021-08-06 18:45:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 18:45:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:34,503 INFO L225 Difference]: With dead ends: 1506 [2021-08-06 18:45:34,503 INFO L226 Difference]: Without dead ends: 1353 [2021-08-06 18:45:34,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-08-06 18:45:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-08-06 18:45:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 712. [2021-08-06 18:45:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 704 states have (on average 1.359375) internal successors, (957), 711 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 957 transitions. [2021-08-06 18:45:34,511 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 957 transitions. Word has length 75 [2021-08-06 18:45:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:34,512 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 957 transitions. [2021-08-06 18:45:34,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 957 transitions. [2021-08-06 18:45:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:34,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:34,513 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:34,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:34,713 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 [2021-08-06 18:45:34,713 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1368122944, now seen corresponding path program 28 times [2021-08-06 18:45:34,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:34,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588777374] [2021-08-06 18:45:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:34,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:34,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:34,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:34,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:34,774 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:34,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:34,807 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:34,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:34,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588777374] [2021-08-06 18:45:34,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588777374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:34,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922990450] [2021-08-06 18:45:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:34,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:34,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:34,837 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:34,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 18:45:35,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:35,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:35,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:36,180 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:36,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:36,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:36,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:36,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:36,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:36,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922990450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:36,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:36,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-06 18:45:36,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535915051] [2021-08-06 18:45:36,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:36,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:36,380 INFO L87 Difference]: Start difference. First operand 712 states and 957 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:36,597 INFO L93 Difference]: Finished difference Result 1436 states and 1821 transitions. [2021-08-06 18:45:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:45:36,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:36,599 INFO L225 Difference]: With dead ends: 1436 [2021-08-06 18:45:36,599 INFO L226 Difference]: Without dead ends: 1283 [2021-08-06 18:45:36,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:45:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-08-06 18:45:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 682. [2021-08-06 18:45:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 674 states have (on average 1.36053412462908) internal successors, (917), 681 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 917 transitions. [2021-08-06 18:45:36,608 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 917 transitions. Word has length 75 [2021-08-06 18:45:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:36,608 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 917 transitions. [2021-08-06 18:45:36,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 917 transitions. [2021-08-06 18:45:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:36,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:36,609 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:36,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-06 18:45:36,816 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 [2021-08-06 18:45:36,816 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:36,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:36,817 INFO L82 PathProgramCache]: Analyzing trace with hash 935078398, now seen corresponding path program 29 times [2021-08-06 18:45:36,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:36,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551733054] [2021-08-06 18:45:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:36,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:36,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:36,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:36,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:36,887 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:36,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:36,898 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:36,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:36,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551733054] [2021-08-06 18:45:36,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551733054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:36,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743149234] [2021-08-06 18:45:36,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:36,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:36,923 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:36,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 18:45:38,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 18:45:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 18:45:38,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:38,342 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:38,343 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:38,431 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:38,432 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:38,442 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:38,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 18:45:38,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743149234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:38,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:38,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-06 18:45:38,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726304056] [2021-08-06 18:45:38,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:45:38,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:38,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:45:38,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 18:45:38,448 INFO L87 Difference]: Start difference. First operand 682 states and 917 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:38,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:38,708 INFO L93 Difference]: Finished difference Result 1832 states and 2334 transitions. [2021-08-06 18:45:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:38,710 INFO L225 Difference]: With dead ends: 1832 [2021-08-06 18:45:38,710 INFO L226 Difference]: Without dead ends: 1664 [2021-08-06 18:45:38,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:45:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-08-06 18:45:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 650. [2021-08-06 18:45:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 642 states have (on average 1.381619937694704) internal successors, (887), 649 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 887 transitions. [2021-08-06 18:45:38,719 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 887 transitions. Word has length 75 [2021-08-06 18:45:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:38,719 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 887 transitions. [2021-08-06 18:45:38,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 887 transitions. [2021-08-06 18:45:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-06 18:45:38,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:38,720 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:38,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:38,921 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 [2021-08-06 18:45:38,921 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1577214803, now seen corresponding path program 30 times [2021-08-06 18:45:38,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:38,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771124150] [2021-08-06 18:45:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:38,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:39,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:39,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:39,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:39,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:39,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:39,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:39,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:39,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771124150] [2021-08-06 18:45:39,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771124150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:39,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134937368] [2021-08-06 18:45:39,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:39,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:39,063 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:39,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 18:45:40,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:45:40,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 18:45:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:40,627 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:40,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:40,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:40,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:40,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134937368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:40,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:40,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 18:45:40,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181562446] [2021-08-06 18:45:40,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:40,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:40,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:40,643 INFO L87 Difference]: Start difference. First operand 650 states and 887 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:40,982 INFO L93 Difference]: Finished difference Result 1282 states and 1612 transitions. [2021-08-06 18:45:40,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:40,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-08-06 18:45:40,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:40,984 INFO L225 Difference]: With dead ends: 1282 [2021-08-06 18:45:40,984 INFO L226 Difference]: Without dead ends: 1159 [2021-08-06 18:45:40,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=333, Invalid=789, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:45:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-08-06 18:45:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 542. [2021-08-06 18:45:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 534 states have (on average 1.3595505617977528) internal successors, (726), 541 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 726 transitions. [2021-08-06 18:45:40,990 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 726 transitions. Word has length 75 [2021-08-06 18:45:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:40,990 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 726 transitions. [2021-08-06 18:45:40,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 726 transitions. [2021-08-06 18:45:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:40,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:40,991 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:41,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 18:45:41,191 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 [2021-08-06 18:45:41,191 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash -634211792, now seen corresponding path program 31 times [2021-08-06 18:45:41,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:41,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175536348] [2021-08-06 18:45:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:41,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:41,234 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:41,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 42.9 percent of original size [2021-08-06 18:45:41,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:41,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:41,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:41,363 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:41,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:41,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175536348] [2021-08-06 18:45:41,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175536348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:41,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690554614] [2021-08-06 18:45:41,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:41,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:41,389 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:41,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 18:45:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:42,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 18:45:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:42,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:42,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:43,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:43,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:43,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:43,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:43,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690554614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:43,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:43,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-06 18:45:43,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961304648] [2021-08-06 18:45:43,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 18:45:43,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 18:45:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-06 18:45:43,200 INFO L87 Difference]: Start difference. First operand 542 states and 726 transitions. Second operand has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:43,424 INFO L93 Difference]: Finished difference Result 1032 states and 1325 transitions. [2021-08-06 18:45:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:45:43,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:43,426 INFO L225 Difference]: With dead ends: 1032 [2021-08-06 18:45:43,426 INFO L226 Difference]: Without dead ends: 882 [2021-08-06 18:45:43,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:45:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-08-06 18:45:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 587. [2021-08-06 18:45:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 579 states have (on average 1.3661485319516407) internal successors, (791), 586 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 791 transitions. [2021-08-06 18:45:43,434 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 791 transitions. Word has length 80 [2021-08-06 18:45:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:43,435 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 791 transitions. [2021-08-06 18:45:43,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 791 transitions. [2021-08-06 18:45:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:43,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:43,436 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:43,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 18:45:43,648 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 [2021-08-06 18:45:43,649 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash -98793706, now seen corresponding path program 32 times [2021-08-06 18:45:43,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:43,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959843944] [2021-08-06 18:45:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:43,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:43,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:43,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:43,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:43,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:43,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:43,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:43,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:43,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959843944] [2021-08-06 18:45:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959843944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:43,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294354732] [2021-08-06 18:45:43,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:43,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:43,823 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:43,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 18:45:45,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:45:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:45,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:45,198 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:45,592 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:45,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:45,601 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:45,601 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:45,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294354732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:45,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:45,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-06 18:45:45,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728168661] [2021-08-06 18:45:45,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:45,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:45,607 INFO L87 Difference]: Start difference. First operand 587 states and 791 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:45,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:45,860 INFO L93 Difference]: Finished difference Result 1548 states and 1960 transitions. [2021-08-06 18:45:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 18:45:45,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:45,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:45,863 INFO L225 Difference]: With dead ends: 1548 [2021-08-06 18:45:45,863 INFO L226 Difference]: Without dead ends: 1398 [2021-08-06 18:45:45,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-08-06 18:45:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2021-08-06 18:45:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 587. [2021-08-06 18:45:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 579 states have (on average 1.3696027633851469) internal successors, (793), 586 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 793 transitions. [2021-08-06 18:45:45,872 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 793 transitions. Word has length 80 [2021-08-06 18:45:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:45,872 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 793 transitions. [2021-08-06 18:45:45,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 793 transitions. [2021-08-06 18:45:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:45,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:45,873 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:45,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:46,088 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 [2021-08-06 18:45:46,089 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1817156086, now seen corresponding path program 33 times [2021-08-06 18:45:46,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:46,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782296031] [2021-08-06 18:45:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:46,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:46,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:46,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:46,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:46,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:46,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:46,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:46,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:46,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782296031] [2021-08-06 18:45:46,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782296031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:46,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900881379] [2021-08-06 18:45:46,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:45:46,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:46,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:46,269 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:46,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 18:45:47,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 18:45:47,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:47,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:47,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:48,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:48,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:48,086 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:48,087 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:48,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900881379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:48,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:48,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-06 18:45:48,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183358462] [2021-08-06 18:45:48,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:48,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:48,092 INFO L87 Difference]: Start difference. First operand 587 states and 793 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:48,331 INFO L93 Difference]: Finished difference Result 1543 states and 1947 transitions. [2021-08-06 18:45:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 18:45:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:48,334 INFO L225 Difference]: With dead ends: 1543 [2021-08-06 18:45:48,334 INFO L226 Difference]: Without dead ends: 1393 [2021-08-06 18:45:48,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-08-06 18:45:48,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-08-06 18:45:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 617. [2021-08-06 18:45:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 609 states have (on average 1.3711001642036125) internal successors, (835), 616 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 835 transitions. [2021-08-06 18:45:48,344 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 835 transitions. Word has length 80 [2021-08-06 18:45:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:48,344 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 835 transitions. [2021-08-06 18:45:48,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 835 transitions. [2021-08-06 18:45:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:48,345 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:48,345 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:48,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:48,572 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 [2021-08-06 18:45:48,572 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash 278532620, now seen corresponding path program 34 times [2021-08-06 18:45:48,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:48,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201561883] [2021-08-06 18:45:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:48,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:48,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:48,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:48,639 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:48,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:48,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:48,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:48,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:48,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201561883] [2021-08-06 18:45:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201561883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:48,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024176454] [2021-08-06 18:45:48,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 18:45:48,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:48,734 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:48,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 18:45:50,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 18:45:50,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:50,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:50,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:50,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:50,403 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:50,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:50,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:50,632 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:50,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:50,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024176454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:50,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:50,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-06 18:45:50,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832118044] [2021-08-06 18:45:50,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:50,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:50,638 INFO L87 Difference]: Start difference. First operand 617 states and 835 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:50,901 INFO L93 Difference]: Finished difference Result 1533 states and 1929 transitions. [2021-08-06 18:45:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 18:45:50,901 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:50,903 INFO L225 Difference]: With dead ends: 1533 [2021-08-06 18:45:50,903 INFO L226 Difference]: Without dead ends: 1383 [2021-08-06 18:45:50,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-06 18:45:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2021-08-06 18:45:50,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 647. [2021-08-06 18:45:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 639 states have (on average 1.3724569640062598) internal successors, (877), 646 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 877 transitions. [2021-08-06 18:45:50,914 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 877 transitions. Word has length 80 [2021-08-06 18:45:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:50,914 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 877 transitions. [2021-08-06 18:45:50,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 877 transitions. [2021-08-06 18:45:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:50,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:50,915 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:50,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 18:45:51,128 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 [2021-08-06 18:45:51,128 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash -878151538, now seen corresponding path program 35 times [2021-08-06 18:45:51,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:51,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818730773] [2021-08-06 18:45:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:51,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:51,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:51,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:51,202 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:51,202 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:51,235 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:51,236 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:51,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:51,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818730773] [2021-08-06 18:45:51,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818730773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:51,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007443469] [2021-08-06 18:45:51,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 18:45:51,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:51,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:51,264 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:51,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 18:45:52,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 18:45:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:52,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:52,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:52,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:52,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:53,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:53,079 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:53,089 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:53,090 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:53,094 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:53,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007443469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:53,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:53,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-06 18:45:53,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129636188] [2021-08-06 18:45:53,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:53,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:53,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:53,096 INFO L87 Difference]: Start difference. First operand 647 states and 877 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:53,397 INFO L93 Difference]: Finished difference Result 1523 states and 1911 transitions. [2021-08-06 18:45:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 18:45:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:53,400 INFO L225 Difference]: With dead ends: 1523 [2021-08-06 18:45:53,400 INFO L226 Difference]: Without dead ends: 1373 [2021-08-06 18:45:53,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 18:45:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-08-06 18:45:53,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 677. [2021-08-06 18:45:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 669 states have (on average 1.3736920777279522) internal successors, (919), 676 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 919 transitions. [2021-08-06 18:45:53,408 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 919 transitions. Word has length 80 [2021-08-06 18:45:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:53,408 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 919 transitions. [2021-08-06 18:45:53,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 919 transitions. [2021-08-06 18:45:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:53,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:53,409 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:53,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:53,609 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 [2021-08-06 18:45:53,610 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:53,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1577761168, now seen corresponding path program 36 times [2021-08-06 18:45:53,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:53,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614594017] [2021-08-06 18:45:53,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:53,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:53,699 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:53,699 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:53,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:53,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 70.0 percent of original size [2021-08-06 18:45:53,723 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:53,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:53,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:53,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614594017] [2021-08-06 18:45:53,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614594017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:53,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288709343] [2021-08-06 18:45:53,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 18:45:53,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:53,756 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:53,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 18:45:55,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 18:45:55,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:45:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:55,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:55,513 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 36.8 percent of original size [2021-08-06 18:45:55,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:55,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:55,568 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:55,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:55,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288709343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:55,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:55,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-06 18:45:55,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386003612] [2021-08-06 18:45:55,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 18:45:55,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:55,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 18:45:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:45:55,574 INFO L87 Difference]: Start difference. First operand 677 states and 919 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:55,894 INFO L93 Difference]: Finished difference Result 1985 states and 2501 transitions. [2021-08-06 18:45:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 18:45:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:55,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:55,898 INFO L225 Difference]: With dead ends: 1985 [2021-08-06 18:45:55,898 INFO L226 Difference]: Without dead ends: 1823 [2021-08-06 18:45:55,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 18:45:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-08-06 18:45:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 710. [2021-08-06 18:45:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 702 states have (on average 1.3846153846153846) internal successors, (972), 709 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:55,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 972 transitions. [2021-08-06 18:45:55,910 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 972 transitions. Word has length 80 [2021-08-06 18:45:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:55,910 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 972 transitions. [2021-08-06 18:45:55,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 972 transitions. [2021-08-06 18:45:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-06 18:45:55,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:55,911 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:55,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 18:45:56,131 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 [2021-08-06 18:45:56,131 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:56,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:56,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1620874028, now seen corresponding path program 37 times [2021-08-06 18:45:56,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:56,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024583396] [2021-08-06 18:45:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:56,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:56,228 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:56,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 27.3 percent of original size [2021-08-06 18:45:56,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:56,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 50.0 percent of original size [2021-08-06 18:45:56,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:56,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 63.6 percent of original size [2021-08-06 18:45:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:56,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:56,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024583396] [2021-08-06 18:45:56,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024583396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:56,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855045507] [2021-08-06 18:45:56,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 18:45:56,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:56,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:56,295 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:56,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 18:45:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 18:45:57,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:45:58,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:58,137 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 50.0 percent of original size [2021-08-06 18:45:58,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:58,146 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 45.5 percent of original size [2021-08-06 18:45:58,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:58,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 6.3 percent of original size [2021-08-06 18:45:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:58,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855045507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:58,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 18:45:58,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-06 18:45:58,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648385996] [2021-08-06 18:45:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 18:45:58,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:45:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 18:45:58,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 18:45:58,160 INFO L87 Difference]: Start difference. First operand 710 states and 972 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:45:58,642 INFO L93 Difference]: Finished difference Result 1411 states and 1770 transitions. [2021-08-06 18:45:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 18:45:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-06 18:45:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:45:58,644 INFO L225 Difference]: With dead ends: 1411 [2021-08-06 18:45:58,644 INFO L226 Difference]: Without dead ends: 1288 [2021-08-06 18:45:58,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 18:45:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-08-06 18:45:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 702. [2021-08-06 18:45:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 694 states have (on average 1.3703170028818443) internal successors, (951), 701 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 951 transitions. [2021-08-06 18:45:58,653 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 951 transitions. Word has length 80 [2021-08-06 18:45:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:45:58,653 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 951 transitions. [2021-08-06 18:45:58,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:45:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 951 transitions. [2021-08-06 18:45:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-06 18:45:58,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:45:58,654 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:45:58,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 18:45:58,880 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 [2021-08-06 18:45:58,881 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:45:58,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:45:58,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1691728315, now seen corresponding path program 38 times [2021-08-06 18:45:58,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:45:58,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918237944] [2021-08-06 18:45:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:45:58,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:45:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:45:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:45:58,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:45:58,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918237944] [2021-08-06 18:45:59,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918237944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:45:59,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653502203] [2021-08-06 18:45:59,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 18:45:59,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:45:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:45:59,001 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:45:59,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 18:46:00,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 18:46:00,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:46:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:46:00,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:46:00,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:46:00,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:46:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:46:00,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653502203] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:46:00,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 18:46:00,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-06 18:46:00,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113629931] [2021-08-06 18:46:00,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:46:00,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:46:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:46:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:46:00,985 INFO L87 Difference]: Start difference. First operand 702 states and 951 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:46:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:46:01,122 INFO L93 Difference]: Finished difference Result 1783 states and 2297 transitions. [2021-08-06 18:46:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:46:01,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-06 18:46:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:46:01,123 INFO L225 Difference]: With dead ends: 1783 [2021-08-06 18:46:01,123 INFO L226 Difference]: Without dead ends: 258 [2021-08-06 18:46:01,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:46:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-06 18:46:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2021-08-06 18:46:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 250 states have (on average 1.232) internal successors, (308), 257 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:46:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 308 transitions. [2021-08-06 18:46:01,125 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 308 transitions. Word has length 85 [2021-08-06 18:46:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:46:01,126 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 308 transitions. [2021-08-06 18:46:01,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:46:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 308 transitions. [2021-08-06 18:46:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-06 18:46:01,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 18:46:01,126 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 18:46:01,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 18:46:01,327 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 [2021-08-06 18:46:01,327 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 18:46:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 18:46:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash -680745668, now seen corresponding path program 39 times [2021-08-06 18:46:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 18:46:01,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607369208] [2021-08-06 18:46:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 18:46:01,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 18:46:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 18:46:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:46:01,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 18:46:01,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607369208] [2021-08-06 18:46:01,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607369208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 18:46:01,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957258091] [2021-08-06 18:46:01,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 18:46:01,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 18:46:01,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 18:46:01,465 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 18:46:01,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 18:46:02,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 18:46:02,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 18:46:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 18:46:02,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 18:46:03,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:46:03,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 18:46:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 18:46:03,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957258091] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 18:46:03,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 18:46:03,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-08-06 18:46:03,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356904965] [2021-08-06 18:46:03,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 18:46:03,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 18:46:03,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 18:46:03,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 18:46:03,360 INFO L87 Difference]: Start difference. First operand 258 states and 308 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:46:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 18:46:03,505 INFO L93 Difference]: Finished difference Result 428 states and 488 transitions. [2021-08-06 18:46:03,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 18:46:03,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-06 18:46:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 18:46:03,506 INFO L225 Difference]: With dead ends: 428 [2021-08-06 18:46:03,506 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 18:46:03,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-08-06 18:46:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 18:46:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 18:46:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:46:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 18:46:03,507 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 85 [2021-08-06 18:46:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 18:46:03,507 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 18:46:03,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 18:46:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 18:46:03,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 18:46:03,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-06 18:46:03,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 18:46:03,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 18:46:03,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 18:46:03,730 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 [2021-08-06 18:46:03,734 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 18:46:03,734 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 18:46:03,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 06:46:03 BasicIcfg [2021-08-06 18:46:03,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 18:46:03,736 INFO L168 Benchmark]: Toolchain (without parser) took 80799.41 ms. Allocated memory was 180.4 MB in the beginning and 652.2 MB in the end (delta: 471.9 MB). Free memory was 143.5 MB in the beginning and 318.5 MB in the end (delta: -175.0 MB). Peak memory consumption was 298.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:46:03,736 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 180.4 MB. Free memory was 161.7 MB in the beginning and 161.5 MB in the end (delta: 216.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 18:46:03,736 INFO L168 Benchmark]: CACSL2BoogieTranslator took 474.05 ms. Allocated memory is still 180.4 MB. Free memory was 143.3 MB in the beginning and 155.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-08-06 18:46:03,736 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.61 ms. Allocated memory is still 180.4 MB. Free memory was 155.8 MB in the beginning and 153.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 18:46:03,736 INFO L168 Benchmark]: Boogie Preprocessor took 32.40 ms. Allocated memory is still 180.4 MB. Free memory was 153.7 MB in the beginning and 152.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:46:03,736 INFO L168 Benchmark]: RCFGBuilder took 429.41 ms. Allocated memory is still 180.4 MB. Free memory was 152.1 MB in the beginning and 130.6 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-08-06 18:46:03,740 INFO L168 Benchmark]: TraceAbstraction took 79795.50 ms. Allocated memory was 180.4 MB in the beginning and 652.2 MB in the end (delta: 471.9 MB). Free memory was 130.1 MB in the beginning and 318.5 MB in the end (delta: -188.3 MB). Peak memory consumption was 283.8 MB. Max. memory is 8.0 GB. [2021-08-06 18:46:03,740 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 180.4 MB. Free memory was 161.7 MB in the beginning and 161.5 MB in the end (delta: 216.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 474.05 ms. Allocated memory is still 180.4 MB. Free memory was 143.3 MB in the beginning and 155.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 58.61 ms. Allocated memory is still 180.4 MB. Free memory was 155.8 MB in the beginning and 153.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.40 ms. Allocated memory is still 180.4 MB. Free memory was 153.7 MB in the beginning and 152.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.41 ms. Allocated memory is still 180.4 MB. Free memory was 152.1 MB in the beginning and 130.6 MB in the end (delta: 21.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 79795.50 ms. Allocated memory was 180.4 MB in the beginning and 652.2 MB in the end (delta: 471.9 MB). Free memory was 130.1 MB in the beginning and 318.5 MB in the end (delta: -188.3 MB). Peak memory consumption was 283.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1969, positive: 1680, positive conditional: 1680, positive unconditional: 0, negative: 289, negative conditional: 289, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1699, positive: 1680, positive conditional: 0, positive unconditional: 1680, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 330, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 330, positive: 327, positive conditional: 0, positive unconditional: 327, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1699, positive: 1353, positive conditional: 0, positive unconditional: 1353, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 330, unknown conditional: 0, unknown unconditional: 330] , Statistics on independence cache: Total cache size (in pairs): 330, Positive cache size: 327, Positive conditional cache size: 0, Positive unconditional cache size: 327, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 270 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 79706.7ms, OverallIterations: 50, TraceHistogramMax: 6, EmptinessCheckTime: 61.7ms, AutomataDifference: 11140.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 185.3ms, PartialOrderReductionTime: 172.2ms, HoareTripleCheckerStatistics: 4005 SDtfs, 14489 SDslu, 23075 SDs, 0 SdLazy, 4795 SolverSat, 1820 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2844.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4053 GetRequests, 2914 SyntacticMatches, 0 SemanticMatches, 1139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5996 ImplicationChecksByTransitivity, 9919.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=780occurred in iteration=0, InterpolantAutomatonStates: 956, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 508.1ms AutomataMinimizationTime, 50 MinimizatonAttempts, 25139 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 501.9ms SsaConstructionTime, 1207.9ms SatisfiabilityAnalysisTime, 25238.7ms InterpolantComputationTime, 6064 NumberOfCodeBlocks, 6064 NumberOfCodeBlocksAsserted, 168 NumberOfCheckSat, 5971 ConstructedInterpolants, 0 QuantifiedInterpolants, 23569 SizeOfPredicates, 353 NumberOfNonLiveVariables, 6704 ConjunctsInSsa, 562 ConjunctsInUnsatCore, 93 InterpolantComputations, 9 PerfectInterpolantSequences, 461/3664 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 18:46:03,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...