/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 16:37:18,689 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 16:37:18,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 16:37:18,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 16:37:18,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 16:37:18,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 16:37:18,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 16:37:18,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 16:37:18,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 16:37:18,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 16:37:18,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 16:37:18,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 16:37:18,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 16:37:18,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 16:37:18,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 16:37:18,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 16:37:18,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 16:37:18,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 16:37:18,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 16:37:18,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 16:37:18,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 16:37:18,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 16:37:18,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 16:37:18,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 16:37:18,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 16:37:18,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 16:37:18,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 16:37:18,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 16:37:18,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 16:37:18,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 16:37:18,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 16:37:18,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 16:37:18,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 16:37:18,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 16:37:18,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 16:37:18,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 16:37:18,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 16:37:18,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 16:37:18,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 16:37:18,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 16:37:18,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 16:37:18,801 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 16:37:18,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 16:37:18,802 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 16:37:18,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 16:37:18,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 16:37:18,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 16:37:18,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 16:37:18,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 16:37:18,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 16:37:18,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 16:37:18,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 16:37:18,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 16:37:18,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 16:37:18,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 16:37:18,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 16:37:18,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 16:37:18,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 16:37:18,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 16:37:18,805 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 16:37:18,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 16:37:19,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 16:37:19,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 16:37:19,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 16:37:19,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-21 16:37:19,162 INFO L275 PluginConnector]: CDTParser initialized [2021-08-21 16:37:19,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-08-21 16:37:19,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e3e04e9/3ad742fb0b7e419dbb025f058fc0dbe6/FLAG46ee1f82a [2021-08-21 16:37:19,770 INFO L306 CDTParser]: Found 1 translation units. [2021-08-21 16:37:19,770 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-08-21 16:37:19,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e3e04e9/3ad742fb0b7e419dbb025f058fc0dbe6/FLAG46ee1f82a [2021-08-21 16:37:20,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e3e04e9/3ad742fb0b7e419dbb025f058fc0dbe6 [2021-08-21 16:37:20,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 16:37:20,222 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-21 16:37:20,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-21 16:37:20,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-21 16:37:20,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-21 16:37:20,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e7be5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20, skipping insertion in model container [2021-08-21 16:37:20,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-21 16:37:20,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-21 16:37:20,611 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i[30286,30299] [2021-08-21 16:37:20,632 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i[31038,31051] [2021-08-21 16:37:20,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 16:37:20,641 INFO L203 MainTranslator]: Completed pre-run [2021-08-21 16:37:20,678 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i[30286,30299] [2021-08-21 16:37:20,689 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i[31038,31051] [2021-08-21 16:37:20,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-21 16:37:20,733 INFO L208 MainTranslator]: Completed translation [2021-08-21 16:37:20,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20 WrapperNode [2021-08-21 16:37:20,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-21 16:37:20,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 16:37:20,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 16:37:20,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 16:37:20,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 16:37:20,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 16:37:20,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 16:37:20,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 16:37:20,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 16:37:20,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 16:37:20,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 16:37:20,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 16:37:20,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (1/1) ... [2021-08-21 16:37:20,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 16:37:20,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:20,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 16:37:20,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 16:37:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-21 16:37:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-21 16:37:20,879 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-21 16:37:20,879 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-21 16:37:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-21 16:37:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-21 16:37:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-21 16:37:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-21 16:37:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-21 16:37:20,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-21 16:37:20,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 16:37:20,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 16:37:20,882 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 16:37:21,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 16:37:21,246 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-21 16:37:21,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:37:21 BoogieIcfgContainer [2021-08-21 16:37:21,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 16:37:21,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 16:37:21,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 16:37:21,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 16:37:21,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:37:20" (1/3) ... [2021-08-21 16:37:21,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7d7edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:37:21, skipping insertion in model container [2021-08-21 16:37:21,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:37:20" (2/3) ... [2021-08-21 16:37:21,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7d7edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:37:21, skipping insertion in model container [2021-08-21 16:37:21,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:37:21" (3/3) ... [2021-08-21 16:37:21,255 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-08-21 16:37:21,262 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 16:37:21,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 16:37:21,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 16:37:21,262 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 16:37:21,288 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,288 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,289 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,289 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,289 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,290 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,291 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,292 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,292 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,292 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,292 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,292 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,293 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,293 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,293 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,293 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,293 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,294 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,295 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,296 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,296 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,297 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,297 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,297 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,298 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,298 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,298 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,298 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,298 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,298 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,301 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,301 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,301 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,302 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,302 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,302 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,306 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,306 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,307 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,307 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,307 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,307 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-21 16:37:21,309 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-21 16:37:21,348 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 16:37:21,355 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 16:37:21,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 16:37:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 933 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 932 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 16:37:21,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:21,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:21,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1527992754, now seen corresponding path program 1 times [2021-08-21 16:37:21,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:21,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112243255] [2021-08-21 16:37:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:21,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:22,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:22,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112243255] [2021-08-21 16:37:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112243255] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:37:22,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:37:22,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-21 16:37:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902000394] [2021-08-21 16:37:22,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 16:37:22,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:22,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 16:37:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-21 16:37:22,057 INFO L87 Difference]: Start difference. First operand has 933 states, 850 states have (on average 1.4270588235294117) internal successors, (1213), 932 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:22,198 INFO L93 Difference]: Finished difference Result 1756 states and 2036 transitions. [2021-08-21 16:37:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 16:37:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 16:37:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:22,213 INFO L225 Difference]: With dead ends: 1756 [2021-08-21 16:37:22,213 INFO L226 Difference]: Without dead ends: 635 [2021-08-21 16:37:22,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:37:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-21 16:37:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 434. [2021-08-21 16:37:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 423 states have (on average 1.3144208037825058) internal successors, (556), 433 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 556 transitions. [2021-08-21 16:37:22,302 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 556 transitions. Word has length 32 [2021-08-21 16:37:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:22,303 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 556 transitions. [2021-08-21 16:37:22,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,303 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 556 transitions. [2021-08-21 16:37:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 16:37:22,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:22,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 16:37:22,310 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:22,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1321610138, now seen corresponding path program 1 times [2021-08-21 16:37:22,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:22,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661674323] [2021-08-21 16:37:22,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:22,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:22,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661674323] [2021-08-21 16:37:22,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661674323] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:37:22,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:37:22,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:37:22,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828658783] [2021-08-21 16:37:22,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:37:22,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:37:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:37:22,498 INFO L87 Difference]: Start difference. First operand 434 states and 556 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:22,602 INFO L93 Difference]: Finished difference Result 859 states and 1082 transitions. [2021-08-21 16:37:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:37:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 16:37:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:22,607 INFO L225 Difference]: With dead ends: 859 [2021-08-21 16:37:22,607 INFO L226 Difference]: Without dead ends: 699 [2021-08-21 16:37:22,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:37:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-08-21 16:37:22,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 476. [2021-08-21 16:37:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 465 states have (on average 1.313978494623656) internal successors, (611), 475 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2021-08-21 16:37:22,630 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 37 [2021-08-21 16:37:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:22,630 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2021-08-21 16:37:22,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2021-08-21 16:37:22,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 16:37:22,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:22,631 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:22,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 16:37:22,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash 42342464, now seen corresponding path program 1 times [2021-08-21 16:37:22,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:22,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790159490] [2021-08-21 16:37:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:22,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:22,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:22,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790159490] [2021-08-21 16:37:22,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790159490] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:37:22,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:37:22,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 16:37:22,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498981653] [2021-08-21 16:37:22,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 16:37:22,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:22,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 16:37:22,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 16:37:22,728 INFO L87 Difference]: Start difference. First operand 476 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:22,816 INFO L93 Difference]: Finished difference Result 846 states and 1079 transitions. [2021-08-21 16:37:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:37:22,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 16:37:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:22,820 INFO L225 Difference]: With dead ends: 846 [2021-08-21 16:37:22,820 INFO L226 Difference]: Without dead ends: 726 [2021-08-21 16:37:22,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:37:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-08-21 16:37:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 479. [2021-08-21 16:37:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 468 states have (on average 1.3205128205128205) internal successors, (618), 478 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 618 transitions. [2021-08-21 16:37:22,841 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 618 transitions. Word has length 37 [2021-08-21 16:37:22,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:22,842 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 618 transitions. [2021-08-21 16:37:22,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 618 transitions. [2021-08-21 16:37:22,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 16:37:22,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:22,844 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:22,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 16:37:22,844 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -564451095, now seen corresponding path program 1 times [2021-08-21 16:37:22,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:22,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959823057] [2021-08-21 16:37:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:22,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:22,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:22,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959823057] [2021-08-21 16:37:22,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959823057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:22,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658104207] [2021-08-21 16:37:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:22,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:22,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:22,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:22,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 16:37:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:37:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:23,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658104207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:23,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:23,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 16:37:23,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568208393] [2021-08-21 16:37:23,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:37:23,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:37:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:37:23,602 INFO L87 Difference]: Start difference. First operand 479 states and 618 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:23,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:23,758 INFO L93 Difference]: Finished difference Result 1073 states and 1359 transitions. [2021-08-21 16:37:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 16:37:23,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 16:37:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:23,762 INFO L225 Difference]: With dead ends: 1073 [2021-08-21 16:37:23,762 INFO L226 Difference]: Without dead ends: 833 [2021-08-21 16:37:23,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:37:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-08-21 16:37:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 559. [2021-08-21 16:37:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 548 states have (on average 1.2919708029197081) internal successors, (708), 558 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 708 transitions. [2021-08-21 16:37:23,787 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 708 transitions. Word has length 42 [2021-08-21 16:37:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:23,788 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 708 transitions. [2021-08-21 16:37:23,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:23,789 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 708 transitions. [2021-08-21 16:37:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 16:37:23,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:23,793 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:23,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-21 16:37:24,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:24,016 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1613099302, now seen corresponding path program 1 times [2021-08-21 16:37:24,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:24,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331480226] [2021-08-21 16:37:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:24,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:24,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:24,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331480226] [2021-08-21 16:37:24,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331480226] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:37:24,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:37:24,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 16:37:24,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545755679] [2021-08-21 16:37:24,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 16:37:24,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 16:37:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 16:37:24,181 INFO L87 Difference]: Start difference. First operand 559 states and 708 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:24,250 INFO L93 Difference]: Finished difference Result 889 states and 1136 transitions. [2021-08-21 16:37:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 16:37:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 16:37:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:24,254 INFO L225 Difference]: With dead ends: 889 [2021-08-21 16:37:24,254 INFO L226 Difference]: Without dead ends: 809 [2021-08-21 16:37:24,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 16:37:24,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-08-21 16:37:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 589. [2021-08-21 16:37:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 578 states have (on average 1.2906574394463668) internal successors, (746), 588 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 746 transitions. [2021-08-21 16:37:24,275 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 746 transitions. Word has length 42 [2021-08-21 16:37:24,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:24,275 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 746 transitions. [2021-08-21 16:37:24,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 746 transitions. [2021-08-21 16:37:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 16:37:24,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:24,277 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:24,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 16:37:24,277 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1113994597, now seen corresponding path program 1 times [2021-08-21 16:37:24,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:24,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724081053] [2021-08-21 16:37:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:24,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:24,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:24,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724081053] [2021-08-21 16:37:24,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724081053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:24,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408845972] [2021-08-21 16:37:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:24,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:24,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:24,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:24,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 16:37:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 16:37:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:24,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408845972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:24,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:24,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 16:37:24,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303528643] [2021-08-21 16:37:24,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 16:37:24,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 16:37:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 16:37:24,914 INFO L87 Difference]: Start difference. First operand 589 states and 746 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:25,084 INFO L93 Difference]: Finished difference Result 1141 states and 1435 transitions. [2021-08-21 16:37:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 16:37:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 16:37:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:25,089 INFO L225 Difference]: With dead ends: 1141 [2021-08-21 16:37:25,089 INFO L226 Difference]: Without dead ends: 981 [2021-08-21 16:37:25,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:37:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-08-21 16:37:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 599. [2021-08-21 16:37:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 588 states have (on average 1.3061224489795917) internal successors, (768), 598 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 768 transitions. [2021-08-21 16:37:25,103 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 768 transitions. Word has length 42 [2021-08-21 16:37:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:25,103 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 768 transitions. [2021-08-21 16:37:25,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 768 transitions. [2021-08-21 16:37:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 16:37:25,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:25,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:25,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 16:37:25,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 16:37:25,321 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1293748584, now seen corresponding path program 2 times [2021-08-21 16:37:25,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:25,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544558506] [2021-08-21 16:37:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:25,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:25,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:25,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544558506] [2021-08-21 16:37:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544558506] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:37:25,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:37:25,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 16:37:25,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394477324] [2021-08-21 16:37:25,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 16:37:25,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:25,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 16:37:25,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 16:37:25,434 INFO L87 Difference]: Start difference. First operand 599 states and 768 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:25,515 INFO L93 Difference]: Finished difference Result 959 states and 1226 transitions. [2021-08-21 16:37:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 16:37:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 16:37:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:25,519 INFO L225 Difference]: With dead ends: 959 [2021-08-21 16:37:25,519 INFO L226 Difference]: Without dead ends: 879 [2021-08-21 16:37:25,519 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-21 16:37:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-08-21 16:37:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 599. [2021-08-21 16:37:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 588 states have (on average 1.3061224489795917) internal successors, (768), 598 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 768 transitions. [2021-08-21 16:37:25,533 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 768 transitions. Word has length 42 [2021-08-21 16:37:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 768 transitions. [2021-08-21 16:37:25,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 768 transitions. [2021-08-21 16:37:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 16:37:25,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:25,535 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:25,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 16:37:25,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:25,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1709216126, now seen corresponding path program 3 times [2021-08-21 16:37:25,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:25,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341557021] [2021-08-21 16:37:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:25,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:25,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:25,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341557021] [2021-08-21 16:37:25,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341557021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 16:37:25,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 16:37:25,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-21 16:37:25,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127269899] [2021-08-21 16:37:25,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 16:37:25,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 16:37:25,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 16:37:25,634 INFO L87 Difference]: Start difference. First operand 599 states and 768 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:25,788 INFO L93 Difference]: Finished difference Result 1076 states and 1383 transitions. [2021-08-21 16:37:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:37:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 16:37:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:25,793 INFO L225 Difference]: With dead ends: 1076 [2021-08-21 16:37:25,793 INFO L226 Difference]: Without dead ends: 956 [2021-08-21 16:37:25,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:37:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-08-21 16:37:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 614. [2021-08-21 16:37:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 603 states have (on average 1.3051409618573797) internal successors, (787), 613 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 787 transitions. [2021-08-21 16:37:25,807 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 787 transitions. Word has length 42 [2021-08-21 16:37:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:25,808 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 787 transitions. [2021-08-21 16:37:25,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 787 transitions. [2021-08-21 16:37:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 16:37:25,809 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:25,809 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:25,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-21 16:37:25,809 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:25,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash 401743887, now seen corresponding path program 1 times [2021-08-21 16:37:25,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:25,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542157705] [2021-08-21 16:37:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:25,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:25,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:25,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542157705] [2021-08-21 16:37:25,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542157705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:25,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765310062] [2021-08-21 16:37:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:25,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:25,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:25,974 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:25,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 16:37:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:26,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:37:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:26,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765310062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:26,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:26,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 16:37:26,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781889060] [2021-08-21 16:37:26,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:37:26,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:37:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:37:26,646 INFO L87 Difference]: Start difference. First operand 614 states and 787 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:26,740 INFO L93 Difference]: Finished difference Result 1026 states and 1313 transitions. [2021-08-21 16:37:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 16:37:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 16:37:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:26,744 INFO L225 Difference]: With dead ends: 1026 [2021-08-21 16:37:26,744 INFO L226 Difference]: Without dead ends: 946 [2021-08-21 16:37:26,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:37:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-08-21 16:37:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 619. [2021-08-21 16:37:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 608 states have (on average 1.3125) internal successors, (798), 618 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 798 transitions. [2021-08-21 16:37:26,758 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 798 transitions. Word has length 47 [2021-08-21 16:37:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:26,758 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 798 transitions. [2021-08-21 16:37:26,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 798 transitions. [2021-08-21 16:37:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 16:37:26,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:26,760 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:26,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:26,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:26,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1304230871, now seen corresponding path program 1 times [2021-08-21 16:37:26,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:26,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064110507] [2021-08-21 16:37:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:26,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:27,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:27,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064110507] [2021-08-21 16:37:27,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064110507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:27,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550004422] [2021-08-21 16:37:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:27,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:27,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:27,097 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:27,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 16:37:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:37:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:27,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550004422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:27,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:27,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 16:37:27,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105043760] [2021-08-21 16:37:27,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:37:27,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:37:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:37:27,725 INFO L87 Difference]: Start difference. First operand 619 states and 798 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:27,948 INFO L93 Difference]: Finished difference Result 1298 states and 1640 transitions. [2021-08-21 16:37:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:37:27,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 16:37:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:27,953 INFO L225 Difference]: With dead ends: 1298 [2021-08-21 16:37:27,953 INFO L226 Difference]: Without dead ends: 1098 [2021-08-21 16:37:27,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:37:27,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-21 16:37:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 693. [2021-08-21 16:37:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 682 states have (on average 1.2932551319648093) internal successors, (882), 692 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 882 transitions. [2021-08-21 16:37:27,969 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 882 transitions. Word has length 47 [2021-08-21 16:37:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:27,970 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 882 transitions. [2021-08-21 16:37:27,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 882 transitions. [2021-08-21 16:37:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 16:37:27,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:27,971 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:27,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:28,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:28,196 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:28,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1167557917, now seen corresponding path program 2 times [2021-08-21 16:37:28,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:28,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998662495] [2021-08-21 16:37:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:28,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:28,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:28,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998662495] [2021-08-21 16:37:28,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998662495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:28,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173267268] [2021-08-21 16:37:28,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:37:28,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:28,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:28,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:28,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 16:37:28,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:37:28,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:37:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173267268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:28,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:28,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 16:37:28,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063223343] [2021-08-21 16:37:28,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:37:28,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:37:28,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:37:28,958 INFO L87 Difference]: Start difference. First operand 693 states and 882 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:29,109 INFO L93 Difference]: Finished difference Result 1182 states and 1490 transitions. [2021-08-21 16:37:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:37:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 16:37:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:29,113 INFO L225 Difference]: With dead ends: 1182 [2021-08-21 16:37:29,113 INFO L226 Difference]: Without dead ends: 1102 [2021-08-21 16:37:29,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:37:29,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-08-21 16:37:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 698. [2021-08-21 16:37:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 687 states have (on average 1.299854439592431) internal successors, (893), 697 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 893 transitions. [2021-08-21 16:37:29,139 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 893 transitions. Word has length 47 [2021-08-21 16:37:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:29,139 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 893 transitions. [2021-08-21 16:37:29,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 893 transitions. [2021-08-21 16:37:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 16:37:29,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:29,140 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:29,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:29,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 16:37:29,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash -124444669, now seen corresponding path program 3 times [2021-08-21 16:37:29,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:29,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792529987] [2021-08-21 16:37:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:29,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:29,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792529987] [2021-08-21 16:37:29,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792529987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:29,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235293641] [2021-08-21 16:37:29,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:37:29,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:29,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:29,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:29,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 16:37:29,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 16:37:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:37:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:30,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235293641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:30,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:30,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 16:37:30,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80692282] [2021-08-21 16:37:30,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:37:30,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:30,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:37:30,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:37:30,237 INFO L87 Difference]: Start difference. First operand 698 states and 893 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:30,678 INFO L93 Difference]: Finished difference Result 1603 states and 2059 transitions. [2021-08-21 16:37:30,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:37:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 16:37:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:30,684 INFO L225 Difference]: With dead ends: 1603 [2021-08-21 16:37:30,684 INFO L226 Difference]: Without dead ends: 1363 [2021-08-21 16:37:30,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:37:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-08-21 16:37:30,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 699. [2021-08-21 16:37:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 688 states have (on average 1.2965116279069768) internal successors, (892), 698 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 892 transitions. [2021-08-21 16:37:30,700 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 892 transitions. Word has length 47 [2021-08-21 16:37:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:30,700 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 892 transitions. [2021-08-21 16:37:30,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 892 transitions. [2021-08-21 16:37:30,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 16:37:30,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:30,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:30,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:30,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:30,925 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash 620538359, now seen corresponding path program 2 times [2021-08-21 16:37:30,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:30,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701227595] [2021-08-21 16:37:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:30,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:31,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:31,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701227595] [2021-08-21 16:37:31,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701227595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:31,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437787587] [2021-08-21 16:37:31,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:37:31,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:31,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:31,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:31,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 16:37:31,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:37:31,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 16:37:31,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:31,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437787587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:31,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:31,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 16:37:31,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087425178] [2021-08-21 16:37:31,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 16:37:31,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 16:37:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-08-21 16:37:31,755 INFO L87 Difference]: Start difference. First operand 699 states and 892 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:32,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:32,049 INFO L93 Difference]: Finished difference Result 1664 states and 2144 transitions. [2021-08-21 16:37:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:37:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 16:37:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:32,054 INFO L225 Difference]: With dead ends: 1664 [2021-08-21 16:37:32,054 INFO L226 Difference]: Without dead ends: 1424 [2021-08-21 16:37:32,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:37:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-08-21 16:37:32,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 709. [2021-08-21 16:37:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 698 states have (on average 1.2951289398280803) internal successors, (904), 708 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 904 transitions. [2021-08-21 16:37:32,069 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 904 transitions. Word has length 47 [2021-08-21 16:37:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 904 transitions. [2021-08-21 16:37:32,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 904 transitions. [2021-08-21 16:37:32,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:32,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:32,071 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:32,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:32,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:32,294 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:32,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1814813382, now seen corresponding path program 4 times [2021-08-21 16:37:32,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:32,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933516190] [2021-08-21 16:37:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:32,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:32,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:32,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933516190] [2021-08-21 16:37:32,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933516190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:32,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868597653] [2021-08-21 16:37:32,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:37:32,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:32,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:32,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:32,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 16:37:32,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:37:32,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:32,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:33,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868597653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:33,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:33,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 16:37:33,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232738137] [2021-08-21 16:37:33,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:37:33,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:33,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:37:33,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:37:33,287 INFO L87 Difference]: Start difference. First operand 709 states and 904 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:33,404 INFO L93 Difference]: Finished difference Result 1266 states and 1604 transitions. [2021-08-21 16:37:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 16:37:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:33,409 INFO L225 Difference]: With dead ends: 1266 [2021-08-21 16:37:33,409 INFO L226 Difference]: Without dead ends: 1186 [2021-08-21 16:37:33,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:37:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-08-21 16:37:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 743. [2021-08-21 16:37:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 732 states have (on average 1.3087431693989071) internal successors, (958), 742 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 958 transitions. [2021-08-21 16:37:33,426 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 958 transitions. Word has length 52 [2021-08-21 16:37:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 958 transitions. [2021-08-21 16:37:33,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:33,427 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 958 transitions. [2021-08-21 16:37:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:33,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:33,428 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:33,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:33,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 16:37:33,651 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash 437395792, now seen corresponding path program 1 times [2021-08-21 16:37:33,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:33,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981721268] [2021-08-21 16:37:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:33,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:33,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:33,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981721268] [2021-08-21 16:37:33,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981721268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:33,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049531721] [2021-08-21 16:37:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:33,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:33,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:33,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:33,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 16:37:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:34,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049531721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:34,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:34,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 16:37:34,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552005157] [2021-08-21 16:37:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:37:34,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:37:34,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:37:34,655 INFO L87 Difference]: Start difference. First operand 743 states and 958 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:34,886 INFO L93 Difference]: Finished difference Result 1418 states and 1780 transitions. [2021-08-21 16:37:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:37:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:34,891 INFO L225 Difference]: With dead ends: 1418 [2021-08-21 16:37:34,891 INFO L226 Difference]: Without dead ends: 1338 [2021-08-21 16:37:34,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:37:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-08-21 16:37:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 782. [2021-08-21 16:37:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 771 states have (on average 1.3073929961089494) internal successors, (1008), 781 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:34,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1008 transitions. [2021-08-21 16:37:34,907 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1008 transitions. Word has length 52 [2021-08-21 16:37:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:34,908 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1008 transitions. [2021-08-21 16:37:34,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1008 transitions. [2021-08-21 16:37:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:34,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:34,909 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:34,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:35,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 16:37:35,125 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1997471382, now seen corresponding path program 3 times [2021-08-21 16:37:35,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:35,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798223611] [2021-08-21 16:37:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:35,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:35,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:35,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798223611] [2021-08-21 16:37:35,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798223611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:35,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107653040] [2021-08-21 16:37:35,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:37:35,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:35,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:35,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:35,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 16:37:35,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 16:37:35,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:35,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:36,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107653040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:36,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:36,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 16:37:36,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827964235] [2021-08-21 16:37:36,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:37:36,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:37:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:37:36,124 INFO L87 Difference]: Start difference. First operand 782 states and 1008 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:36,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:36,368 INFO L93 Difference]: Finished difference Result 1642 states and 2061 transitions. [2021-08-21 16:37:36,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:37:36,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:36,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:36,372 INFO L225 Difference]: With dead ends: 1642 [2021-08-21 16:37:36,372 INFO L226 Difference]: Without dead ends: 1402 [2021-08-21 16:37:36,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:37:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-08-21 16:37:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 863. [2021-08-21 16:37:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 852 states have (on average 1.2863849765258215) internal successors, (1096), 862 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1096 transitions. [2021-08-21 16:37:36,388 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1096 transitions. Word has length 52 [2021-08-21 16:37:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1096 transitions. [2021-08-21 16:37:36,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1096 transitions. [2021-08-21 16:37:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:36,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:36,390 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:36,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:36,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 16:37:36,605 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2127096389, now seen corresponding path program 2 times [2021-08-21 16:37:36,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:36,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959890991] [2021-08-21 16:37:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:36,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:36,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:36,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959890991] [2021-08-21 16:37:36,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959890991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:36,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646833901] [2021-08-21 16:37:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:37:36,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:36,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:36,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 16:37:37,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:37:37,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:37,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:37,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:37,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646833901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:37,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:37,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 16:37:37,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478409244] [2021-08-21 16:37:37,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:37:37,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:37:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:37:37,542 INFO L87 Difference]: Start difference. First operand 863 states and 1096 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:37,793 INFO L93 Difference]: Finished difference Result 1538 states and 1917 transitions. [2021-08-21 16:37:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 16:37:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:37,797 INFO L225 Difference]: With dead ends: 1538 [2021-08-21 16:37:37,797 INFO L226 Difference]: Without dead ends: 1378 [2021-08-21 16:37:37,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-08-21 16:37:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-08-21 16:37:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 873. [2021-08-21 16:37:37,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 1.296983758700696) internal successors, (1118), 872 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1118 transitions. [2021-08-21 16:37:37,813 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1118 transitions. Word has length 52 [2021-08-21 16:37:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:37,814 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1118 transitions. [2021-08-21 16:37:37,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1118 transitions. [2021-08-21 16:37:37,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:37,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:37,815 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:37,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-21 16:37:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 16:37:38,037 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1988116920, now seen corresponding path program 5 times [2021-08-21 16:37:38,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:38,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644301229] [2021-08-21 16:37:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:38,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:38,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:38,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644301229] [2021-08-21 16:37:38,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644301229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:38,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480600237] [2021-08-21 16:37:38,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:37:38,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:38,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:38,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 16:37:38,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:37:38,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:38,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:38,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:39,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480600237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:39,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:39,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 16:37:39,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401606244] [2021-08-21 16:37:39,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:37:39,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:37:39,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:37:39,055 INFO L87 Difference]: Start difference. First operand 873 states and 1118 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:39,233 INFO L93 Difference]: Finished difference Result 1476 states and 1852 transitions. [2021-08-21 16:37:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:37:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:39,238 INFO L225 Difference]: With dead ends: 1476 [2021-08-21 16:37:39,238 INFO L226 Difference]: Without dead ends: 1396 [2021-08-21 16:37:39,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:37:39,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-08-21 16:37:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 868. [2021-08-21 16:37:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.2917152858809802) internal successors, (1107), 867 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1107 transitions. [2021-08-21 16:37:39,255 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1107 transitions. Word has length 52 [2021-08-21 16:37:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:39,255 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1107 transitions. [2021-08-21 16:37:39,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1107 transitions. [2021-08-21 16:37:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:39,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:39,256 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:39,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:39,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 16:37:39,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 696114334, now seen corresponding path program 6 times [2021-08-21 16:37:39,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:39,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103556725] [2021-08-21 16:37:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:39,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:39,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:39,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103556725] [2021-08-21 16:37:39,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103556725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:39,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987404339] [2021-08-21 16:37:39,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:37:39,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:39,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:39,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:39,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 16:37:40,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 16:37:40,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987404339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:40,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:40,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 16:37:40,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647819052] [2021-08-21 16:37:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 16:37:40,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 16:37:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-21 16:37:40,579 INFO L87 Difference]: Start difference. First operand 868 states and 1107 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:41,023 INFO L93 Difference]: Finished difference Result 1933 states and 2467 transitions. [2021-08-21 16:37:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:37:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:41,027 INFO L225 Difference]: With dead ends: 1933 [2021-08-21 16:37:41,027 INFO L226 Difference]: Without dead ends: 1693 [2021-08-21 16:37:41,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:37:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-08-21 16:37:41,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 849. [2021-08-21 16:37:41,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 838 states have (on average 1.295942720763723) internal successors, (1086), 848 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 1086 transitions. [2021-08-21 16:37:41,045 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 1086 transitions. Word has length 52 [2021-08-21 16:37:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:41,045 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 1086 transitions. [2021-08-21 16:37:41,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 1086 transitions. [2021-08-21 16:37:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:41,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:41,046 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:41,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:41,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:41,267 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:41,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:41,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1441097362, now seen corresponding path program 2 times [2021-08-21 16:37:41,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:41,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060877493] [2021-08-21 16:37:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:41,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:41,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:41,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060877493] [2021-08-21 16:37:41,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060877493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:41,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708909659] [2021-08-21 16:37:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:37:41,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:41,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:41,401 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:41,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 16:37:42,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:37:42,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:42,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708909659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:42,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:42,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 16:37:42,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600404676] [2021-08-21 16:37:42,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:37:42,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:37:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:37:42,431 INFO L87 Difference]: Start difference. First operand 849 states and 1086 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:42,981 INFO L93 Difference]: Finished difference Result 1987 states and 2497 transitions. [2021-08-21 16:37:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:37:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:42,986 INFO L225 Difference]: With dead ends: 1987 [2021-08-21 16:37:42,986 INFO L226 Difference]: Without dead ends: 1827 [2021-08-21 16:37:42,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:37:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-21 16:37:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 904. [2021-08-21 16:37:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 893 states have (on average 1.2933930571108623) internal successors, (1155), 903 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1155 transitions. [2021-08-21 16:37:43,005 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1155 transitions. Word has length 52 [2021-08-21 16:37:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:43,005 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1155 transitions. [2021-08-21 16:37:43,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1155 transitions. [2021-08-21 16:37:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 16:37:43,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:43,007 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:43,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:43,229 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:43,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash 945842004, now seen corresponding path program 3 times [2021-08-21 16:37:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:43,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320689831] [2021-08-21 16:37:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:43,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:43,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:43,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320689831] [2021-08-21 16:37:43,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320689831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:43,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236532308] [2021-08-21 16:37:43,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:37:43,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:43,343 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:43,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 16:37:43,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 16:37:43,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:43,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 16:37:43,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:44,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236532308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:44,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:44,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 16:37:44,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035057599] [2021-08-21 16:37:44,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 16:37:44,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 16:37:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-21 16:37:44,257 INFO L87 Difference]: Start difference. First operand 904 states and 1155 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:44,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:44,902 INFO L93 Difference]: Finished difference Result 2165 states and 2733 transitions. [2021-08-21 16:37:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:37:44,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 16:37:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:44,906 INFO L225 Difference]: With dead ends: 2165 [2021-08-21 16:37:44,907 INFO L226 Difference]: Without dead ends: 2005 [2021-08-21 16:37:44,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:37:44,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-08-21 16:37:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 939. [2021-08-21 16:37:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 928 states have (on average 1.293103448275862) internal successors, (1200), 938 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1200 transitions. [2021-08-21 16:37:44,926 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1200 transitions. Word has length 52 [2021-08-21 16:37:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:44,926 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 1200 transitions. [2021-08-21 16:37:44,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1200 transitions. [2021-08-21 16:37:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:44,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:44,928 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:44,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 16:37:45,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:45,146 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:45,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1899838063, now seen corresponding path program 7 times [2021-08-21 16:37:45,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:45,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032578683] [2021-08-21 16:37:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:45,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:45,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:45,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032578683] [2021-08-21 16:37:45,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032578683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:45,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690487897] [2021-08-21 16:37:45,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:37:45,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:45,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:45,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:45,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 16:37:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:46,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:46,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690487897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:46,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:46,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 16:37:46,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111916923] [2021-08-21 16:37:46,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:37:46,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:46,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:37:46,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:37:46,521 INFO L87 Difference]: Start difference. First operand 939 states and 1200 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:46,610 INFO L93 Difference]: Finished difference Result 1525 states and 1933 transitions. [2021-08-21 16:37:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 16:37:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:46,615 INFO L225 Difference]: With dead ends: 1525 [2021-08-21 16:37:46,615 INFO L226 Difference]: Without dead ends: 1445 [2021-08-21 16:37:46,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:37:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-08-21 16:37:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 978. [2021-08-21 16:37:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 967 states have (on average 1.3081695966907962) internal successors, (1265), 977 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:46,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1265 transitions. [2021-08-21 16:37:46,628 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1265 transitions. Word has length 57 [2021-08-21 16:37:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:46,628 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1265 transitions. [2021-08-21 16:37:46,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1265 transitions. [2021-08-21 16:37:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:46,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:46,630 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:46,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 16:37:46,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 16:37:46,849 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash 522420473, now seen corresponding path program 4 times [2021-08-21 16:37:46,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:46,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019716477] [2021-08-21 16:37:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:46,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:46,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:46,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019716477] [2021-08-21 16:37:46,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019716477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:46,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717075260] [2021-08-21 16:37:46,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:37:46,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:46,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:46,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:47,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 16:37:47,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:37:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:48,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717075260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:48,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:48,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 16:37:48,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081266115] [2021-08-21 16:37:48,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:37:48,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:48,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:37:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:37:48,297 INFO L87 Difference]: Start difference. First operand 978 states and 1265 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:48,620 INFO L93 Difference]: Finished difference Result 1781 states and 2237 transitions. [2021-08-21 16:37:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:37:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:48,625 INFO L225 Difference]: With dead ends: 1781 [2021-08-21 16:37:48,625 INFO L226 Difference]: Without dead ends: 1701 [2021-08-21 16:37:48,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:37:48,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-08-21 16:37:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 978. [2021-08-21 16:37:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 967 states have (on average 1.3081695966907962) internal successors, (1265), 977 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1265 transitions. [2021-08-21 16:37:48,640 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1265 transitions. Word has length 57 [2021-08-21 16:37:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:48,640 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1265 transitions. [2021-08-21 16:37:48,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:48,640 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1265 transitions. [2021-08-21 16:37:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:48,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:48,642 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:48,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:48,860 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:48,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1148685949, now seen corresponding path program 5 times [2021-08-21 16:37:48,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:48,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887647605] [2021-08-21 16:37:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:48,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:48,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887647605] [2021-08-21 16:37:48,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887647605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:48,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137445859] [2021-08-21 16:37:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:37:48,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:48,991 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:49,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 16:37:49,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:37:49,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:49,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:49,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:50,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137445859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:50,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:50,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 16:37:50,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079002185] [2021-08-21 16:37:50,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:37:50,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:37:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:37:50,250 INFO L87 Difference]: Start difference. First operand 978 states and 1265 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:50,615 INFO L93 Difference]: Finished difference Result 2061 states and 2580 transitions. [2021-08-21 16:37:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:37:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:50,619 INFO L225 Difference]: With dead ends: 2061 [2021-08-21 16:37:50,619 INFO L226 Difference]: Without dead ends: 1861 [2021-08-21 16:37:50,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:37:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-08-21 16:37:50,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1067. [2021-08-21 16:37:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1056 states have (on average 1.300189393939394) internal successors, (1373), 1066 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1373 transitions. [2021-08-21 16:37:50,636 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1373 transitions. Word has length 57 [2021-08-21 16:37:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:50,636 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1373 transitions. [2021-08-21 16:37:50,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1373 transitions. [2021-08-21 16:37:50,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:50,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:50,638 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:50,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 16:37:50,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:50,861 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2082496063, now seen corresponding path program 6 times [2021-08-21 16:37:50,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:50,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563949285] [2021-08-21 16:37:50,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:50,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:50,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:50,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563949285] [2021-08-21 16:37:50,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563949285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:50,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791357187] [2021-08-21 16:37:50,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:37:50,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:50,997 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:51,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 16:37:51,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 16:37:51,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:52,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791357187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:52,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:52,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 16:37:52,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592994518] [2021-08-21 16:37:52,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:37:52,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:52,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:37:52,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:37:52,357 INFO L87 Difference]: Start difference. First operand 1067 states and 1373 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:52,667 INFO L93 Difference]: Finished difference Result 2021 states and 2522 transitions. [2021-08-21 16:37:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:37:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:52,671 INFO L225 Difference]: With dead ends: 2021 [2021-08-21 16:37:52,671 INFO L226 Difference]: Without dead ends: 1941 [2021-08-21 16:37:52,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 16:37:52,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2021-08-21 16:37:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 1082. [2021-08-21 16:37:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1071 states have (on average 1.2987861811391224) internal successors, (1391), 1081 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1391 transitions. [2021-08-21 16:37:52,686 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1391 transitions. Word has length 57 [2021-08-21 16:37:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:52,686 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 1391 transitions. [2021-08-21 16:37:52,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1391 transitions. [2021-08-21 16:37:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:52,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:52,688 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:52,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:52,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:52,899 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2025722963, now seen corresponding path program 7 times [2021-08-21 16:37:52,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:52,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886370193] [2021-08-21 16:37:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:52,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:53,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:53,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886370193] [2021-08-21 16:37:53,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886370193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:53,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688963446] [2021-08-21 16:37:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:37:53,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:53,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:53,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:53,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 16:37:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:53,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:54,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688963446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:54,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:54,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 16:37:54,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970260294] [2021-08-21 16:37:54,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:37:54,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:37:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:37:54,348 INFO L87 Difference]: Start difference. First operand 1082 states and 1391 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:54,627 INFO L93 Difference]: Finished difference Result 2010 states and 2517 transitions. [2021-08-21 16:37:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:37:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:54,630 INFO L225 Difference]: With dead ends: 2010 [2021-08-21 16:37:54,630 INFO L226 Difference]: Without dead ends: 1930 [2021-08-21 16:37:54,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:37:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-08-21 16:37:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1062. [2021-08-21 16:37:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1051 states have (on average 1.295908658420552) internal successors, (1362), 1061 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1362 transitions. [2021-08-21 16:37:54,643 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1362 transitions. Word has length 57 [2021-08-21 16:37:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:54,643 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1362 transitions. [2021-08-21 16:37:54,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:54,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1362 transitions. [2021-08-21 16:37:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:54,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:54,645 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:54,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:54,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 16:37:54,856 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1848389117, now seen corresponding path program 8 times [2021-08-21 16:37:54,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:54,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587197118] [2021-08-21 16:37:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:54,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:54,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:54,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587197118] [2021-08-21 16:37:54,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587197118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:54,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242640260] [2021-08-21 16:37:54,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:37:54,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:54,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:54,981 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:54,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 16:37:55,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:37:55,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:55,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:56,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242640260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:56,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:56,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 16:37:56,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401399686] [2021-08-21 16:37:56,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:37:56,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:56,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:37:56,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:37:56,297 INFO L87 Difference]: Start difference. First operand 1062 states and 1362 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:56,434 INFO L93 Difference]: Finished difference Result 1711 states and 2140 transitions. [2021-08-21 16:37:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 16:37:56,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:56,437 INFO L225 Difference]: With dead ends: 1711 [2021-08-21 16:37:56,437 INFO L226 Difference]: Without dead ends: 1631 [2021-08-21 16:37:56,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:37:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-08-21 16:37:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1057. [2021-08-21 16:37:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1046 states have (on average 1.2915869980879542) internal successors, (1351), 1056 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1351 transitions. [2021-08-21 16:37:56,468 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1351 transitions. Word has length 57 [2021-08-21 16:37:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:56,468 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1351 transitions. [2021-08-21 16:37:56,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1351 transitions. [2021-08-21 16:37:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:56,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:56,470 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:56,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 16:37:56,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 16:37:56,673 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash 556386531, now seen corresponding path program 9 times [2021-08-21 16:37:56,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:56,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826987166] [2021-08-21 16:37:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:56,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:56,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:56,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826987166] [2021-08-21 16:37:56,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826987166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:56,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319338661] [2021-08-21 16:37:56,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:37:56,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:56,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:56,791 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:56,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 16:37:57,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:37:57,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:57,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:57,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:37:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:58,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319338661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:58,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:37:58,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 16:37:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647623050] [2021-08-21 16:37:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:37:58,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:37:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:37:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:37:58,156 INFO L87 Difference]: Start difference. First operand 1057 states and 1351 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:37:58,557 INFO L93 Difference]: Finished difference Result 2080 states and 2615 transitions. [2021-08-21 16:37:58,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:37:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:37:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:37:58,561 INFO L225 Difference]: With dead ends: 2080 [2021-08-21 16:37:58,561 INFO L226 Difference]: Without dead ends: 1920 [2021-08-21 16:37:58,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=280, Invalid=980, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 16:37:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-21 16:37:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1059. [2021-08-21 16:37:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1048 states have (on average 1.291030534351145) internal successors, (1353), 1058 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1353 transitions. [2021-08-21 16:37:58,577 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1353 transitions. Word has length 57 [2021-08-21 16:37:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:37:58,577 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 1353 transitions. [2021-08-21 16:37:58,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:37:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1353 transitions. [2021-08-21 16:37:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:37:58,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:37:58,579 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:37:58,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 16:37:58,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 16:37:58,793 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:37:58,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:37:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1301369559, now seen corresponding path program 8 times [2021-08-21 16:37:58,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:37:58,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994432783] [2021-08-21 16:37:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:37:58,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:37:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:37:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:37:58,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:37:58,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994432783] [2021-08-21 16:37:58,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994432783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:37:58,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078011556] [2021-08-21 16:37:58,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:37:58,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:37:58,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:37:58,910 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:37:58,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 16:37:59,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:37:59,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:37:59,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:37:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:00,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078011556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:00,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:00,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 16:38:00,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191443760] [2021-08-21 16:38:00,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:38:00,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:38:00,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:38:00,398 INFO L87 Difference]: Start difference. First operand 1059 states and 1353 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:01,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:01,259 INFO L93 Difference]: Finished difference Result 2615 states and 3306 transitions. [2021-08-21 16:38:01,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 16:38:01,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:38:01,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:01,263 INFO L225 Difference]: With dead ends: 2615 [2021-08-21 16:38:01,263 INFO L226 Difference]: Without dead ends: 2375 [2021-08-21 16:38:01,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 848.3ms TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:38:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-08-21 16:38:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1112. [2021-08-21 16:38:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1101 states have (on average 1.2824704813805632) internal successors, (1412), 1111 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1412 transitions. [2021-08-21 16:38:01,277 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1412 transitions. Word has length 57 [2021-08-21 16:38:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:01,277 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1412 transitions. [2021-08-21 16:38:01,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1412 transitions. [2021-08-21 16:38:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:38:01,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:01,278 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:01,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 16:38:01,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:01,479 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:01,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:01,480 INFO L82 PathProgramCache]: Analyzing trace with hash -759237165, now seen corresponding path program 9 times [2021-08-21 16:38:01,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:01,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072999592] [2021-08-21 16:38:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:01,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:01,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:01,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072999592] [2021-08-21 16:38:01,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072999592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:01,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147357617] [2021-08-21 16:38:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:38:01,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:01,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:01,593 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:01,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 16:38:02,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 16:38:02,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:02,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:38:02,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147357617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:03,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 16:38:03,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486307548] [2021-08-21 16:38:03,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 16:38:03,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 16:38:03,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 16:38:03,009 INFO L87 Difference]: Start difference. First operand 1112 states and 1412 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:04,109 INFO L93 Difference]: Finished difference Result 3124 states and 3920 transitions. [2021-08-21 16:38:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 16:38:04,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:38:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:04,113 INFO L225 Difference]: With dead ends: 3124 [2021-08-21 16:38:04,113 INFO L226 Difference]: Without dead ends: 2804 [2021-08-21 16:38:04,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 988.7ms TimeCoverageRelationStatistics Valid=752, Invalid=2788, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 16:38:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-08-21 16:38:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 1212. [2021-08-21 16:38:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 1201 states have (on average 1.2739383846794339) internal successors, (1530), 1211 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1530 transitions. [2021-08-21 16:38:04,127 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1530 transitions. Word has length 57 [2021-08-21 16:38:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1530 transitions. [2021-08-21 16:38:04,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1530 transitions. [2021-08-21 16:38:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:38:04,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:04,129 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:04,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 16:38:04,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:04,329 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1923817235, now seen corresponding path program 10 times [2021-08-21 16:38:04,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:04,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922428896] [2021-08-21 16:38:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:04,330 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:04,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:04,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922428896] [2021-08-21 16:38:04,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922428896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:04,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056357805] [2021-08-21 16:38:04,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:38:04,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:04,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:04,449 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:04,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 16:38:05,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:38:05,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:05,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:38:05,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:05,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056357805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:05,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:05,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 16:38:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977771738] [2021-08-21 16:38:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:38:05,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:38:05,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:38:05,866 INFO L87 Difference]: Start difference. First operand 1212 states and 1530 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:06,705 INFO L93 Difference]: Finished difference Result 2742 states and 3434 transitions. [2021-08-21 16:38:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 16:38:06,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:38:06,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:06,709 INFO L225 Difference]: With dead ends: 2742 [2021-08-21 16:38:06,710 INFO L226 Difference]: Without dead ends: 2582 [2021-08-21 16:38:06,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:38:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-08-21 16:38:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1240. [2021-08-21 16:38:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1229 states have (on average 1.2823433685923515) internal successors, (1576), 1239 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:06,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1576 transitions. [2021-08-21 16:38:06,730 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1576 transitions. Word has length 57 [2021-08-21 16:38:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:06,731 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1576 transitions. [2021-08-21 16:38:06,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1576 transitions. [2021-08-21 16:38:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 16:38:06,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:06,732 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:06,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 16:38:06,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-21 16:38:06,959 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:06,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1607616345, now seen corresponding path program 11 times [2021-08-21 16:38:06,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:06,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693696500] [2021-08-21 16:38:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:06,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:07,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:07,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693696500] [2021-08-21 16:38:07,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693696500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:07,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46532943] [2021-08-21 16:38:07,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:38:07,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:07,079 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:07,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 16:38:08,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:38:08,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:08,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 16:38:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:08,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46532943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:08,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:08,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 16:38:08,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376192140] [2021-08-21 16:38:08,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 16:38:08,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 16:38:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-21 16:38:08,626 INFO L87 Difference]: Start difference. First operand 1240 states and 1576 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:09,118 INFO L93 Difference]: Finished difference Result 2451 states and 3093 transitions. [2021-08-21 16:38:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:38:09,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 16:38:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:09,122 INFO L225 Difference]: With dead ends: 2451 [2021-08-21 16:38:09,123 INFO L226 Difference]: Without dead ends: 2291 [2021-08-21 16:38:09,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 508.7ms TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:38:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-08-21 16:38:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1234. [2021-08-21 16:38:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1223 states have (on average 1.277187244480785) internal successors, (1562), 1233 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1562 transitions. [2021-08-21 16:38:09,142 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1562 transitions. Word has length 57 [2021-08-21 16:38:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:09,143 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1562 transitions. [2021-08-21 16:38:09,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1562 transitions. [2021-08-21 16:38:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:09,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:09,145 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:09,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:09,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 16:38:09,369 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 731004006, now seen corresponding path program 10 times [2021-08-21 16:38:09,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:09,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459064764] [2021-08-21 16:38:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:09,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:09,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:09,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459064764] [2021-08-21 16:38:09,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459064764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:09,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283630820] [2021-08-21 16:38:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:38:09,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:09,525 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:09,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 16:38:10,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:38:10,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:10,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:10,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283630820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:11,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:11,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:11,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651452843] [2021-08-21 16:38:11,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:11,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:11,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:11,247 INFO L87 Difference]: Start difference. First operand 1234 states and 1562 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:11,356 INFO L93 Difference]: Finished difference Result 2105 states and 2639 transitions. [2021-08-21 16:38:11,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 16:38:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:11,359 INFO L225 Difference]: With dead ends: 2105 [2021-08-21 16:38:11,359 INFO L226 Difference]: Without dead ends: 2025 [2021-08-21 16:38:11,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:38:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-08-21 16:38:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1254. [2021-08-21 16:38:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1243 states have (on average 1.2920353982300885) internal successors, (1606), 1253 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1606 transitions. [2021-08-21 16:38:11,372 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1606 transitions. Word has length 62 [2021-08-21 16:38:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:11,372 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1606 transitions. [2021-08-21 16:38:11,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1606 transitions. [2021-08-21 16:38:11,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:11,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:11,373 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:11,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 16:38:11,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:11,574 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:11,574 INFO L82 PathProgramCache]: Analyzing trace with hash -974970752, now seen corresponding path program 12 times [2021-08-21 16:38:11,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:11,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948734635] [2021-08-21 16:38:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:11,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:11,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:11,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948734635] [2021-08-21 16:38:11,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948734635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:11,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572051362] [2021-08-21 16:38:11,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:38:11,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:11,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:11,721 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:11,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 16:38:12,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:38:12,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:12,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:13,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572051362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:13,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:13,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:13,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492316081] [2021-08-21 16:38:13,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:13,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:13,503 INFO L87 Difference]: Start difference. First operand 1254 states and 1606 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:13,738 INFO L93 Difference]: Finished difference Result 2190 states and 2746 transitions. [2021-08-21 16:38:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 16:38:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:13,742 INFO L225 Difference]: With dead ends: 2190 [2021-08-21 16:38:13,742 INFO L226 Difference]: Without dead ends: 2110 [2021-08-21 16:38:13,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-08-21 16:38:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-08-21 16:38:13,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1249. [2021-08-21 16:38:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1238 states have (on average 1.2883683360258482) internal successors, (1595), 1248 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1595 transitions. [2021-08-21 16:38:13,772 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1595 transitions. Word has length 62 [2021-08-21 16:38:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:13,772 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1595 transitions. [2021-08-21 16:38:13,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1595 transitions. [2021-08-21 16:38:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:13,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:13,774 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:13,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:14,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:14,000 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:14,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:14,000 INFO L82 PathProgramCache]: Analyzing trace with hash -646413584, now seen corresponding path program 13 times [2021-08-21 16:38:14,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:14,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276877020] [2021-08-21 16:38:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:14,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:14,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:14,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276877020] [2021-08-21 16:38:14,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276877020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:14,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747446441] [2021-08-21 16:38:14,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:38:14,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:14,143 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:14,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 16:38:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:16,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747446441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:16,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:16,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:16,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811772369] [2021-08-21 16:38:16,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:16,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:16,015 INFO L87 Difference]: Start difference. First operand 1249 states and 1595 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:16,394 INFO L93 Difference]: Finished difference Result 2339 states and 2933 transitions. [2021-08-21 16:38:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 16:38:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:16,397 INFO L225 Difference]: With dead ends: 2339 [2021-08-21 16:38:16,397 INFO L226 Difference]: Without dead ends: 2259 [2021-08-21 16:38:16,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 16:38:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-08-21 16:38:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1259. [2021-08-21 16:38:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1248 states have (on average 1.2860576923076923) internal successors, (1605), 1258 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1605 transitions. [2021-08-21 16:38:16,416 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1605 transitions. Word has length 62 [2021-08-21 16:38:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:16,417 INFO L470 AbstractCegarLoop]: Abstraction has 1259 states and 1605 transitions. [2021-08-21 16:38:16,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1605 transitions. [2021-08-21 16:38:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:16,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:16,418 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:16,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:16,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:16,619 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash 913662006, now seen corresponding path program 14 times [2021-08-21 16:38:16,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:16,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122960294] [2021-08-21 16:38:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:16,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:16,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:16,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122960294] [2021-08-21 16:38:16,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122960294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:16,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227185740] [2021-08-21 16:38:16,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:38:16,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:16,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:16,777 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:16,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 16:38:18,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:38:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:18,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227185740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:18,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:18,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:18,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456124885] [2021-08-21 16:38:18,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:18,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:18,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:18,660 INFO L87 Difference]: Start difference. First operand 1259 states and 1605 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:19,058 INFO L93 Difference]: Finished difference Result 2379 states and 2981 transitions. [2021-08-21 16:38:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 16:38:19,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:19,061 INFO L225 Difference]: With dead ends: 2379 [2021-08-21 16:38:19,061 INFO L226 Difference]: Without dead ends: 2299 [2021-08-21 16:38:19,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:38:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-08-21 16:38:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 1284. [2021-08-21 16:38:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1273 states have (on average 1.2851531814611155) internal successors, (1636), 1283 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1636 transitions. [2021-08-21 16:38:19,074 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1636 transitions. Word has length 62 [2021-08-21 16:38:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:19,074 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 1636 transitions. [2021-08-21 16:38:19,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1636 transitions. [2021-08-21 16:38:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:19,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:19,076 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:19,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 16:38:19,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 16:38:19,277 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1440818482, now seen corresponding path program 15 times [2021-08-21 16:38:19,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:19,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529490401] [2021-08-21 16:38:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:19,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:19,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:19,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529490401] [2021-08-21 16:38:19,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529490401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:19,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746869124] [2021-08-21 16:38:19,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:38:19,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:19,426 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:19,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 16:38:20,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:38:20,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:20,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:21,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746869124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:21,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:21,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:21,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524689375] [2021-08-21 16:38:21,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:21,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:21,329 INFO L87 Difference]: Start difference. First operand 1284 states and 1636 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:21,935 INFO L93 Difference]: Finished difference Result 2796 states and 3475 transitions. [2021-08-21 16:38:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 16:38:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:21,938 INFO L225 Difference]: With dead ends: 2796 [2021-08-21 16:38:21,938 INFO L226 Difference]: Without dead ends: 2596 [2021-08-21 16:38:21,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 16:38:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-21 16:38:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1393. [2021-08-21 16:38:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1382 states have (on average 1.276410998552822) internal successors, (1764), 1392 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1764 transitions. [2021-08-21 16:38:21,976 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1764 transitions. Word has length 62 [2021-08-21 16:38:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:21,976 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1764 transitions. [2021-08-21 16:38:21,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1764 transitions. [2021-08-21 16:38:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:21,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:21,983 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:22,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:22,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 16:38:22,205 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:22,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1100410276, now seen corresponding path program 16 times [2021-08-21 16:38:22,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:22,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294123356] [2021-08-21 16:38:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:22,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:22,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:22,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294123356] [2021-08-21 16:38:22,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294123356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:22,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762942645] [2021-08-21 16:38:22,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:38:22,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:22,345 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:22,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 16:38:23,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:38:23,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:23,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:24,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762942645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:24,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:24,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:24,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511922407] [2021-08-21 16:38:24,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:24,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:24,303 INFO L87 Difference]: Start difference. First operand 1393 states and 1764 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:24,771 INFO L93 Difference]: Finished difference Result 2676 states and 3321 transitions. [2021-08-21 16:38:24,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:38:24,772 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:24,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:24,774 INFO L225 Difference]: With dead ends: 2676 [2021-08-21 16:38:24,774 INFO L226 Difference]: Without dead ends: 2596 [2021-08-21 16:38:24,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:38:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-08-21 16:38:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1403. [2021-08-21 16:38:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1392 states have (on average 1.276580459770115) internal successors, (1777), 1402 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1777 transitions. [2021-08-21 16:38:24,790 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1777 transitions. Word has length 62 [2021-08-21 16:38:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 1777 transitions. [2021-08-21 16:38:24,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1777 transitions. [2021-08-21 16:38:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:24,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:24,792 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:24,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:25,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 16:38:25,005 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1539089290, now seen corresponding path program 4 times [2021-08-21 16:38:25,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:25,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569841342] [2021-08-21 16:38:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:25,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:25,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:25,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569841342] [2021-08-21 16:38:25,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569841342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:25,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404917688] [2021-08-21 16:38:25,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:38:25,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:25,129 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:25,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 16:38:26,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:38:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:26,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:27,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404917688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:27,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:27,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:27,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075704749] [2021-08-21 16:38:27,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:27,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:27,130 INFO L87 Difference]: Start difference. First operand 1403 states and 1777 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:27,529 INFO L93 Difference]: Finished difference Result 2645 states and 3295 transitions. [2021-08-21 16:38:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:38:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:27,531 INFO L225 Difference]: With dead ends: 2645 [2021-08-21 16:38:27,532 INFO L226 Difference]: Without dead ends: 2445 [2021-08-21 16:38:27,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:38:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-08-21 16:38:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1443. [2021-08-21 16:38:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1432 states have (on average 1.2723463687150838) internal successors, (1822), 1442 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1822 transitions. [2021-08-21 16:38:27,553 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1822 transitions. Word has length 62 [2021-08-21 16:38:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:27,553 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 1822 transitions. [2021-08-21 16:38:27,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1822 transitions. [2021-08-21 16:38:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:27,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:27,556 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:27,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:27,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 16:38:27,781 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1173456386, now seen corresponding path program 17 times [2021-08-21 16:38:27,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:27,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178652353] [2021-08-21 16:38:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:27,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:27,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:27,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178652353] [2021-08-21 16:38:27,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178652353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:27,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045237694] [2021-08-21 16:38:27,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:38:27,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:27,909 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:27,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 16:38:29,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:38:29,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:29,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:29,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045237694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:29,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:29,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:29,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780894126] [2021-08-21 16:38:29,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:29,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:29,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:29,939 INFO L87 Difference]: Start difference. First operand 1443 states and 1822 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:30,346 INFO L93 Difference]: Finished difference Result 2743 states and 3403 transitions. [2021-08-21 16:38:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:38:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:30,349 INFO L225 Difference]: With dead ends: 2743 [2021-08-21 16:38:30,349 INFO L226 Difference]: Without dead ends: 2663 [2021-08-21 16:38:30,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:38:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-08-21 16:38:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1426. [2021-08-21 16:38:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1415 states have (on average 1.2777385159010601) internal successors, (1808), 1425 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1808 transitions. [2021-08-21 16:38:30,364 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1808 transitions. Word has length 62 [2021-08-21 16:38:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:30,364 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 1808 transitions. [2021-08-21 16:38:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1808 transitions. [2021-08-21 16:38:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:30,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:30,366 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:30,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 16:38:30,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 16:38:30,580 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:30,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2059698922, now seen corresponding path program 18 times [2021-08-21 16:38:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:30,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324402505] [2021-08-21 16:38:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:30,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:30,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:30,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324402505] [2021-08-21 16:38:30,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324402505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:30,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937110691] [2021-08-21 16:38:30,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:38:30,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:30,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:30,714 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:30,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 16:38:32,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:38:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937110691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:32,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:32,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628515491] [2021-08-21 16:38:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:32,853 INFO L87 Difference]: Start difference. First operand 1426 states and 1808 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:33,140 INFO L93 Difference]: Finished difference Result 2399 states and 2987 transitions. [2021-08-21 16:38:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:38:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:33,143 INFO L225 Difference]: With dead ends: 2399 [2021-08-21 16:38:33,143 INFO L226 Difference]: Without dead ends: 2319 [2021-08-21 16:38:33,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=265, Invalid=791, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:38:33,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-08-21 16:38:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1413. [2021-08-21 16:38:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1402 states have (on average 1.2696148359486448) internal successors, (1780), 1412 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1780 transitions. [2021-08-21 16:38:33,160 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1780 transitions. Word has length 62 [2021-08-21 16:38:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:33,160 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 1780 transitions. [2021-08-21 16:38:33,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1780 transitions. [2021-08-21 16:38:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:33,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:33,163 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:33,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:33,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:33,389 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:33,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1047988005, now seen corresponding path program 3 times [2021-08-21 16:38:33,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:33,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095931899] [2021-08-21 16:38:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:33,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:33,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:33,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095931899] [2021-08-21 16:38:33,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095931899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:33,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482907675] [2021-08-21 16:38:33,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:38:33,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:33,535 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:33,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 16:38:35,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 16:38:35,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:35,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:35,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482907675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:35,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:35,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:35,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877046817] [2021-08-21 16:38:35,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:35,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:35,662 INFO L87 Difference]: Start difference. First operand 1413 states and 1780 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:35,893 INFO L93 Difference]: Finished difference Result 2273 states and 2812 transitions. [2021-08-21 16:38:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:38:35,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:35,895 INFO L225 Difference]: With dead ends: 2273 [2021-08-21 16:38:35,895 INFO L226 Difference]: Without dead ends: 2113 [2021-08-21 16:38:35,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 16:38:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-08-21 16:38:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1423. [2021-08-21 16:38:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1412 states have (on average 1.2762039660056657) internal successors, (1802), 1422 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 1802 transitions. [2021-08-21 16:38:35,907 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 1802 transitions. Word has length 62 [2021-08-21 16:38:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:35,907 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 1802 transitions. [2021-08-21 16:38:35,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 1802 transitions. [2021-08-21 16:38:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:35,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:35,909 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:35,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:36,110 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1227741992, now seen corresponding path program 11 times [2021-08-21 16:38:36,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:36,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303737161] [2021-08-21 16:38:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:36,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:36,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303737161] [2021-08-21 16:38:36,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303737161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:36,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043084738] [2021-08-21 16:38:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:38:36,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:36,234 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:36,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 16:38:37,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:38:37,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:37,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:38,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043084738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:38,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:38,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:38,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722737259] [2021-08-21 16:38:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:38,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:38,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:38,423 INFO L87 Difference]: Start difference. First operand 1423 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:38,604 INFO L93 Difference]: Finished difference Result 2421 states and 3001 transitions. [2021-08-21 16:38:38,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:38:38,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:38,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:38,606 INFO L225 Difference]: With dead ends: 2421 [2021-08-21 16:38:38,606 INFO L226 Difference]: Without dead ends: 2341 [2021-08-21 16:38:38,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-08-21 16:38:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-08-21 16:38:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 1433. [2021-08-21 16:38:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1422 states have (on average 1.2827004219409284) internal successors, (1824), 1432 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1824 transitions. [2021-08-21 16:38:38,620 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1824 transitions. Word has length 62 [2021-08-21 16:38:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:38,620 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1824 transitions. [2021-08-21 16:38:38,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1824 transitions. [2021-08-21 16:38:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:38,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:38,622 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:38,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:38,841 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:38,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1775222718, now seen corresponding path program 12 times [2021-08-21 16:38:38,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:38,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174055749] [2021-08-21 16:38:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:38,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:38,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:38,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174055749] [2021-08-21 16:38:38,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174055749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:38,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853542716] [2021-08-21 16:38:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:38:38,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:38,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:38,973 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:38,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 16:38:40,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:38:40,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:40,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:40,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:41,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853542716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:41,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:41,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-21 16:38:41,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923104490] [2021-08-21 16:38:41,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:38:41,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:41,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:38:41,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:38:41,200 INFO L87 Difference]: Start difference. First operand 1433 states and 1824 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:41,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:41,612 INFO L93 Difference]: Finished difference Result 2721 states and 3401 transitions. [2021-08-21 16:38:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:38:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:41,615 INFO L225 Difference]: With dead ends: 2721 [2021-08-21 16:38:41,615 INFO L226 Difference]: Without dead ends: 2561 [2021-08-21 16:38:41,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:38:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-08-21 16:38:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1433. [2021-08-21 16:38:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1422 states have (on average 1.2827004219409284) internal successors, (1824), 1432 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1824 transitions. [2021-08-21 16:38:41,629 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1824 transitions. Word has length 62 [2021-08-21 16:38:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1824 transitions. [2021-08-21 16:38:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1824 transitions. [2021-08-21 16:38:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:41,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:41,631 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:41,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 16:38:41,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 16:38:41,831 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:41,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1235498418, now seen corresponding path program 19 times [2021-08-21 16:38:41,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:41,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360227788] [2021-08-21 16:38:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:41,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:41,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:41,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360227788] [2021-08-21 16:38:41,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360227788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:41,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119849409] [2021-08-21 16:38:41,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:38:41,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:41,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:41,975 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:41,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 16:38:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:43,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:44,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119849409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:44,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:44,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:44,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337753304] [2021-08-21 16:38:44,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:44,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:44,228 INFO L87 Difference]: Start difference. First operand 1433 states and 1824 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:44,552 INFO L93 Difference]: Finished difference Result 2545 states and 3161 transitions. [2021-08-21 16:38:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:38:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:44,555 INFO L225 Difference]: With dead ends: 2545 [2021-08-21 16:38:44,555 INFO L226 Difference]: Without dead ends: 2465 [2021-08-21 16:38:44,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 370.8ms TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:38:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-08-21 16:38:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1428. [2021-08-21 16:38:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1417 states have (on average 1.2794636556104446) internal successors, (1813), 1427 states have internal predecessors, (1813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1813 transitions. [2021-08-21 16:38:44,569 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1813 transitions. Word has length 62 [2021-08-21 16:38:44,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:44,570 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1813 transitions. [2021-08-21 16:38:44,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1813 transitions. [2021-08-21 16:38:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:44,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:44,571 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:44,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 16:38:44,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 16:38:44,772 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash 429612772, now seen corresponding path program 20 times [2021-08-21 16:38:44,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:44,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539483705] [2021-08-21 16:38:44,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:44,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:44,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539483705] [2021-08-21 16:38:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539483705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822645212] [2021-08-21 16:38:44,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:38:44,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:44,921 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:44,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 16:38:46,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:38:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:47,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822645212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:47,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:47,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:47,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581704475] [2021-08-21 16:38:47,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:47,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:47,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:47,244 INFO L87 Difference]: Start difference. First operand 1428 states and 1813 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:48,006 INFO L93 Difference]: Finished difference Result 3400 states and 4266 transitions. [2021-08-21 16:38:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:38:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:48,009 INFO L225 Difference]: With dead ends: 3400 [2021-08-21 16:38:48,010 INFO L226 Difference]: Without dead ends: 3160 [2021-08-21 16:38:48,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 757.8ms TimeCoverageRelationStatistics Valid=558, Invalid=2198, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 16:38:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3160 states. [2021-08-21 16:38:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3160 to 1439. [2021-08-21 16:38:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1428 states have (on average 1.2794117647058822) internal successors, (1827), 1438 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1827 transitions. [2021-08-21 16:38:48,025 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1827 transitions. Word has length 62 [2021-08-21 16:38:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:48,026 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1827 transitions. [2021-08-21 16:38:48,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1827 transitions. [2021-08-21 16:38:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:48,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:48,027 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:48,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 16:38:48,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 16:38:48,228 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:48,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2024950388, now seen corresponding path program 21 times [2021-08-21 16:38:48,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:48,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754066709] [2021-08-21 16:38:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:48,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:48,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:48,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754066709] [2021-08-21 16:38:48,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754066709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:48,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42887486] [2021-08-21 16:38:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:38:48,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:48,357 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:48,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 16:38:50,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:38:50,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42887486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:50,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:50,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:50,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423699666] [2021-08-21 16:38:50,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:50,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:50,852 INFO L87 Difference]: Start difference. First operand 1439 states and 1827 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:51,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:51,750 INFO L93 Difference]: Finished difference Result 3440 states and 4338 transitions. [2021-08-21 16:38:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 16:38:51,750 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:51,753 INFO L225 Difference]: With dead ends: 3440 [2021-08-21 16:38:51,754 INFO L226 Difference]: Without dead ends: 3200 [2021-08-21 16:38:51,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2702, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:38:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3200 states. [2021-08-21 16:38:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3200 to 1504. [2021-08-21 16:38:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1493 states have (on average 1.2793034159410583) internal successors, (1910), 1503 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1910 transitions. [2021-08-21 16:38:51,776 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1910 transitions. Word has length 62 [2021-08-21 16:38:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:51,776 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 1910 transitions. [2021-08-21 16:38:51,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1910 transitions. [2021-08-21 16:38:51,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:51,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:51,778 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:51,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 16:38:51,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 16:38:51,993 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash 459599022, now seen corresponding path program 22 times [2021-08-21 16:38:51,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:51,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247054740] [2021-08-21 16:38:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:51,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:52,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:52,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247054740] [2021-08-21 16:38:52,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247054740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:52,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980978138] [2021-08-21 16:38:52,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:38:52,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:52,126 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:52,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 16:38:54,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:38:54,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:54,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:54,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980978138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:54,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:54,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:54,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880777529] [2021-08-21 16:38:54,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:54,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:54,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:54,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:54,552 INFO L87 Difference]: Start difference. First operand 1504 states and 1910 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:55,754 INFO L93 Difference]: Finished difference Result 3775 states and 4737 transitions. [2021-08-21 16:38:55,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 16:38:55,754 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:55,758 INFO L225 Difference]: With dead ends: 3775 [2021-08-21 16:38:55,758 INFO L226 Difference]: Without dead ends: 3535 [2021-08-21 16:38:55,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1156.4ms TimeCoverageRelationStatistics Valid=961, Invalid=3461, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 16:38:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2021-08-21 16:38:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 1479. [2021-08-21 16:38:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 1468 states have (on average 1.2813351498637602) internal successors, (1881), 1478 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1881 transitions. [2021-08-21 16:38:55,775 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1881 transitions. Word has length 62 [2021-08-21 16:38:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:55,775 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 1881 transitions. [2021-08-21 16:38:55,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1881 transitions. [2021-08-21 16:38:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:55,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:55,777 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:55,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 16:38:55,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:55,997 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:38:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:38:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash 743040378, now seen corresponding path program 23 times [2021-08-21 16:38:55,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:38:55,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478451927] [2021-08-21 16:38:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:38:55,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:38:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:38:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:56,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:38:56,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478451927] [2021-08-21 16:38:56,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478451927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:56,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484490878] [2021-08-21 16:38:56,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:38:56,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:38:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:38:56,137 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:38:56,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 16:38:58,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:38:58,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:38:58,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:38:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:38:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:38:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484490878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:38:58,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:38:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:38:58,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240973721] [2021-08-21 16:38:58,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:38:58,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:38:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:38:58,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:38:58,696 INFO L87 Difference]: Start difference. First operand 1479 states and 1881 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:38:59,825 INFO L93 Difference]: Finished difference Result 3360 states and 4258 transitions. [2021-08-21 16:38:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 16:38:59,826 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:38:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:38:59,829 INFO L225 Difference]: With dead ends: 3360 [2021-08-21 16:38:59,829 INFO L226 Difference]: Without dead ends: 3120 [2021-08-21 16:38:59,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1089.3ms TimeCoverageRelationStatistics Valid=831, Invalid=3075, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 16:38:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-08-21 16:38:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 1439. [2021-08-21 16:38:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1428 states have (on average 1.272408963585434) internal successors, (1817), 1438 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:59,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1817 transitions. [2021-08-21 16:38:59,850 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1817 transitions. Word has length 62 [2021-08-21 16:38:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:38:59,851 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1817 transitions. [2021-08-21 16:38:59,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:38:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1817 transitions. [2021-08-21 16:38:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:38:59,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:38:59,853 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:38:59,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:00,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 16:39:00,073 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:00,073 INFO L82 PathProgramCache]: Analyzing trace with hash -378419406, now seen corresponding path program 24 times [2021-08-21 16:39:00,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:00,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393121415] [2021-08-21 16:39:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:00,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:00,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:00,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393121415] [2021-08-21 16:39:00,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393121415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:00,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110021321] [2021-08-21 16:39:00,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:39:00,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:00,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:00,205 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:00,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 16:39:02,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:39:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:02,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110021321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:02,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:02,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:39:02,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900394084] [2021-08-21 16:39:02,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:39:02,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:39:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:02,639 INFO L87 Difference]: Start difference. First operand 1439 states and 1817 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:03,888 INFO L93 Difference]: Finished difference Result 4186 states and 5262 transitions. [2021-08-21 16:39:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 16:39:03,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:39:03,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:03,893 INFO L225 Difference]: With dead ends: 4186 [2021-08-21 16:39:03,893 INFO L226 Difference]: Without dead ends: 3946 [2021-08-21 16:39:03,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1184.1ms TimeCoverageRelationStatistics Valid=1103, Invalid=3867, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 16:39:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3946 states. [2021-08-21 16:39:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3946 to 1560. [2021-08-21 16:39:03,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1549 states have (on average 1.2730794060684312) internal successors, (1972), 1559 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 1972 transitions. [2021-08-21 16:39:03,918 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 1972 transitions. Word has length 62 [2021-08-21 16:39:03,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:03,918 INFO L470 AbstractCegarLoop]: Abstraction has 1560 states and 1972 transitions. [2021-08-21 16:39:03,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:03,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 1972 transitions. [2021-08-21 16:39:03,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:39:03,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:03,920 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:03,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:04,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 16:39:04,121 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:04,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1990332302, now seen corresponding path program 25 times [2021-08-21 16:39:04,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:04,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962716689] [2021-08-21 16:39:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:04,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:04,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:04,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962716689] [2021-08-21 16:39:04,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962716689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:04,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905204342] [2021-08-21 16:39:04,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:39:04,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:04,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:04,245 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:04,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 16:39:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:06,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905204342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:06,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:06,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:39:06,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938898528] [2021-08-21 16:39:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:39:06,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:39:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:06,779 INFO L87 Difference]: Start difference. First operand 1560 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:08,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:08,190 INFO L93 Difference]: Finished difference Result 4499 states and 5651 transitions. [2021-08-21 16:39:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-21 16:39:08,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:39:08,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:08,195 INFO L225 Difference]: With dead ends: 4499 [2021-08-21 16:39:08,195 INFO L226 Difference]: Without dead ends: 4259 [2021-08-21 16:39:08,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 1315.7ms TimeCoverageRelationStatistics Valid=1335, Invalid=4671, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 16:39:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-08-21 16:39:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 1555. [2021-08-21 16:39:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1544 states have (on average 1.2804404145077721) internal successors, (1977), 1554 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 1977 transitions. [2021-08-21 16:39:08,215 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 1977 transitions. Word has length 62 [2021-08-21 16:39:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:08,215 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 1977 transitions. [2021-08-21 16:39:08,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 1977 transitions. [2021-08-21 16:39:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:39:08,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:08,217 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:08,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:08,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-21 16:39:08,417 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash 341915200, now seen corresponding path program 26 times [2021-08-21 16:39:08,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:08,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299055332] [2021-08-21 16:39:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:08,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:08,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299055332] [2021-08-21 16:39:08,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299055332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:08,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371361250] [2021-08-21 16:39:08,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:39:08,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:08,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:08,551 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:08,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 16:39:10,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:39:10,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:11,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371361250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:11,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:11,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:39:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623975791] [2021-08-21 16:39:11,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:39:11,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:39:11,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:11,131 INFO L87 Difference]: Start difference. First operand 1555 states and 1977 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:12,297 INFO L93 Difference]: Finished difference Result 4249 states and 5353 transitions. [2021-08-21 16:39:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 16:39:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:39:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:12,302 INFO L225 Difference]: With dead ends: 4249 [2021-08-21 16:39:12,302 INFO L226 Difference]: Without dead ends: 4009 [2021-08-21 16:39:12,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1900 ImplicationChecksByTransitivity, 1073.0ms TimeCoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 16:39:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4009 states. [2021-08-21 16:39:12,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4009 to 1618. [2021-08-21 16:39:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1607 states have (on average 1.2868699439950217) internal successors, (2068), 1617 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2068 transitions. [2021-08-21 16:39:12,321 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2068 transitions. Word has length 62 [2021-08-21 16:39:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:12,322 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 2068 transitions. [2021-08-21 16:39:12,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2068 transitions. [2021-08-21 16:39:12,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:39:12,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:12,323 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:12,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 16:39:12,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:12,524 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 121807278, now seen corresponding path program 5 times [2021-08-21 16:39:12,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:12,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864408472] [2021-08-21 16:39:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:12,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:12,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:12,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864408472] [2021-08-21 16:39:12,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864408472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:12,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272591447] [2021-08-21 16:39:12,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:39:12,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:12,669 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:12,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 16:39:14,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:39:14,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272591447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:15,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:15,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-21 16:39:15,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708411130] [2021-08-21 16:39:15,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 16:39:15,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 16:39:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-21 16:39:15,218 INFO L87 Difference]: Start difference. First operand 1618 states and 2068 transitions. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:15,996 INFO L93 Difference]: Finished difference Result 3496 states and 4384 transitions. [2021-08-21 16:39:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:39:15,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:39:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:16,000 INFO L225 Difference]: With dead ends: 3496 [2021-08-21 16:39:16,000 INFO L226 Difference]: Without dead ends: 3336 [2021-08-21 16:39:16,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 780.3ms TimeCoverageRelationStatistics Valid=817, Invalid=2489, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:39:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-08-21 16:39:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 1648. [2021-08-21 16:39:16,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1637 states have (on average 1.291386682956628) internal successors, (2114), 1647 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 2114 transitions. [2021-08-21 16:39:16,018 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 2114 transitions. Word has length 62 [2021-08-21 16:39:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:16,018 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 2114 transitions. [2021-08-21 16:39:16,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:16,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 2114 transitions. [2021-08-21 16:39:16,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:39:16,020 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:16,020 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:16,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 16:39:16,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:16,245 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash 206731566, now seen corresponding path program 27 times [2021-08-21 16:39:16,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:16,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455159617] [2021-08-21 16:39:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:16,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:16,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:16,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455159617] [2021-08-21 16:39:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455159617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:16,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590250845] [2021-08-21 16:39:16,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:39:16,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:16,392 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:16,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 16:39:18,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 16:39:18,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:19,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590250845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:19,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:19,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:39:19,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372793205] [2021-08-21 16:39:19,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:39:19,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:19,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:39:19,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:19,030 INFO L87 Difference]: Start difference. First operand 1648 states and 2114 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:20,087 INFO L93 Difference]: Finished difference Result 4169 states and 5279 transitions. [2021-08-21 16:39:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 16:39:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:39:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:20,091 INFO L225 Difference]: With dead ends: 4169 [2021-08-21 16:39:20,091 INFO L226 Difference]: Without dead ends: 3929 [2021-08-21 16:39:20,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 978.2ms TimeCoverageRelationStatistics Valid=913, Invalid=3247, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 16:39:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-08-21 16:39:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 1638. [2021-08-21 16:39:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1627 states have (on average 1.3005531653349724) internal successors, (2116), 1637 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2116 transitions. [2021-08-21 16:39:20,109 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2116 transitions. Word has length 62 [2021-08-21 16:39:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:20,109 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2116 transitions. [2021-08-21 16:39:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2116 transitions. [2021-08-21 16:39:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-21 16:39:20,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:20,111 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:20,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 16:39:20,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:20,311 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash -69832134, now seen corresponding path program 28 times [2021-08-21 16:39:20,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:20,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317560390] [2021-08-21 16:39:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:20,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:20,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317560390] [2021-08-21 16:39:20,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317560390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:20,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820251315] [2021-08-21 16:39:20,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:39:20,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:20,429 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:20,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 16:39:22,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:39:22,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:22,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 16:39:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:23,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820251315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:23,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:23,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-08-21 16:39:23,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101422948] [2021-08-21 16:39:23,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 16:39:23,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 16:39:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-21 16:39:23,119 INFO L87 Difference]: Start difference. First operand 1638 states and 2116 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:24,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:24,267 INFO L93 Difference]: Finished difference Result 4453 states and 5623 transitions. [2021-08-21 16:39:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 16:39:24,268 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-21 16:39:24,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:24,272 INFO L225 Difference]: With dead ends: 4453 [2021-08-21 16:39:24,272 INFO L226 Difference]: Without dead ends: 4213 [2021-08-21 16:39:24,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 1098.9ms TimeCoverageRelationStatistics Valid=1076, Invalid=4180, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 16:39:24,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-08-21 16:39:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 1652. [2021-08-21 16:39:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1641 states have (on average 1.2906764168190128) internal successors, (2118), 1651 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2118 transitions. [2021-08-21 16:39:24,292 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2118 transitions. Word has length 62 [2021-08-21 16:39:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:24,292 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 2118 transitions. [2021-08-21 16:39:24,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2118 transitions. [2021-08-21 16:39:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:24,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:24,293 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:24,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 16:39:24,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 16:39:24,494 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:24,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash -122495793, now seen corresponding path program 13 times [2021-08-21 16:39:24,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:24,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145734133] [2021-08-21 16:39:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:24,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:24,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:24,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145734133] [2021-08-21 16:39:24,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145734133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:24,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803974164] [2021-08-21 16:39:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:39:24,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:24,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:24,654 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:24,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 16:39:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:26,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:27,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803974164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:27,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:27,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:27,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546556740] [2021-08-21 16:39:27,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:27,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:27,506 INFO L87 Difference]: Start difference. First operand 1652 states and 2118 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:27,585 INFO L93 Difference]: Finished difference Result 2543 states and 3229 transitions. [2021-08-21 16:39:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 16:39:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:27,588 INFO L225 Difference]: With dead ends: 2543 [2021-08-21 16:39:27,588 INFO L226 Difference]: Without dead ends: 2463 [2021-08-21 16:39:27,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-08-21 16:39:27,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-21 16:39:27,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1677. [2021-08-21 16:39:27,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1666 states have (on average 1.3043217286914766) internal successors, (2173), 1676 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2173 transitions. [2021-08-21 16:39:27,604 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2173 transitions. Word has length 67 [2021-08-21 16:39:27,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:27,604 INFO L470 AbstractCegarLoop]: Abstraction has 1677 states and 2173 transitions. [2021-08-21 16:39:27,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2173 transitions. [2021-08-21 16:39:27,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:27,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:27,605 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:27,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 16:39:27,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 16:39:27,806 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:27,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1828470551, now seen corresponding path program 29 times [2021-08-21 16:39:27,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:27,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323958788] [2021-08-21 16:39:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:27,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:27,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:27,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323958788] [2021-08-21 16:39:27,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323958788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:27,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118071677] [2021-08-21 16:39:27,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:39:27,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:27,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:27,969 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:28,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 16:39:30,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:39:30,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:30,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:30,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118071677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:30,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:30,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:30,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25434581] [2021-08-21 16:39:30,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:30,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:30,890 INFO L87 Difference]: Start difference. First operand 1677 states and 2173 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:31,109 INFO L93 Difference]: Finished difference Result 2763 states and 3505 transitions. [2021-08-21 16:39:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:39:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:31,112 INFO L225 Difference]: With dead ends: 2763 [2021-08-21 16:39:31,112 INFO L226 Difference]: Without dead ends: 2683 [2021-08-21 16:39:31,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2021-08-21 16:39:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-08-21 16:39:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1696. [2021-08-21 16:39:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1685 states have (on average 1.3020771513353115) internal successors, (2194), 1695 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2194 transitions. [2021-08-21 16:39:31,129 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2194 transitions. Word has length 67 [2021-08-21 16:39:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:31,130 INFO L470 AbstractCegarLoop]: Abstraction has 1696 states and 2194 transitions. [2021-08-21 16:39:31,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2194 transitions. [2021-08-21 16:39:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:31,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:31,132 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:31,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 16:39:31,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 16:39:31,332 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:31,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1499913383, now seen corresponding path program 30 times [2021-08-21 16:39:31,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:31,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033315899] [2021-08-21 16:39:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:31,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:31,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:31,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033315899] [2021-08-21 16:39:31,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033315899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:31,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946076729] [2021-08-21 16:39:31,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:39:31,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:31,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:31,481 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:31,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 16:39:33,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:39:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:34,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946076729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:34,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:34,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:34,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209152892] [2021-08-21 16:39:34,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:34,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:34,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:34,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:34,455 INFO L87 Difference]: Start difference. First operand 1696 states and 2194 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:34,768 INFO L93 Difference]: Finished difference Result 2932 states and 3720 transitions. [2021-08-21 16:39:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:39:34,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:34,771 INFO L225 Difference]: With dead ends: 2932 [2021-08-21 16:39:34,771 INFO L226 Difference]: Without dead ends: 2852 [2021-08-21 16:39:34,771 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:39:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-08-21 16:39:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1706. [2021-08-21 16:39:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1695 states have (on average 1.3002949852507375) internal successors, (2204), 1705 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2204 transitions. [2021-08-21 16:39:34,786 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2204 transitions. Word has length 67 [2021-08-21 16:39:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:34,786 INFO L470 AbstractCegarLoop]: Abstraction has 1706 states and 2204 transitions. [2021-08-21 16:39:34,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2204 transitions. [2021-08-21 16:39:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:34,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:34,788 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:34,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 16:39:34,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 16:39:34,989 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash -873647907, now seen corresponding path program 31 times [2021-08-21 16:39:34,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:34,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671385042] [2021-08-21 16:39:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:34,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:35,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:35,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671385042] [2021-08-21 16:39:35,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671385042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:35,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057452555] [2021-08-21 16:39:35,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:39:35,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:35,177 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:35,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 16:39:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:37,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:37,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:38,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057452555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:38,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:38,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:38,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033247681] [2021-08-21 16:39:38,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:38,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:38,327 INFO L87 Difference]: Start difference. First operand 1706 states and 2204 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:38,732 INFO L93 Difference]: Finished difference Result 3276 states and 4152 transitions. [2021-08-21 16:39:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:39:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:38,735 INFO L225 Difference]: With dead ends: 3276 [2021-08-21 16:39:38,735 INFO L226 Difference]: Without dead ends: 3196 [2021-08-21 16:39:38,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:39:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-08-21 16:39:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 1731. [2021-08-21 16:39:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1720 states have (on average 1.2994186046511629) internal successors, (2235), 1730 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2235 transitions. [2021-08-21 16:39:38,752 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2235 transitions. Word has length 67 [2021-08-21 16:39:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:38,752 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2235 transitions. [2021-08-21 16:39:38,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2235 transitions. [2021-08-21 16:39:38,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:38,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:38,754 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:38,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:38,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 16:39:38,954 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash 587318683, now seen corresponding path program 32 times [2021-08-21 16:39:38,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:38,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425047648] [2021-08-21 16:39:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:38,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:39,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:39,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425047648] [2021-08-21 16:39:39,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425047648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:39,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713223544] [2021-08-21 16:39:39,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:39:39,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:39,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:39,133 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:39,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 16:39:41,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:39:41,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:42,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713223544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:42,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:42,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:42,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816036956] [2021-08-21 16:39:42,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:42,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:42,329 INFO L87 Difference]: Start difference. First operand 1731 states and 2235 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:42,902 INFO L93 Difference]: Finished difference Result 3331 states and 4201 transitions. [2021-08-21 16:39:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:39:42,903 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:42,906 INFO L225 Difference]: With dead ends: 3331 [2021-08-21 16:39:42,906 INFO L226 Difference]: Without dead ends: 3251 [2021-08-21 16:39:42,906 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 635.8ms TimeCoverageRelationStatistics Valid=399, Invalid=1161, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:39:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-08-21 16:39:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 1766. [2021-08-21 16:39:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1755 states have (on average 1.2968660968660968) internal successors, (2276), 1765 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2276 transitions. [2021-08-21 16:39:42,922 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2276 transitions. Word has length 67 [2021-08-21 16:39:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:42,922 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2276 transitions. [2021-08-21 16:39:42,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2276 transitions. [2021-08-21 16:39:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:42,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:42,924 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:42,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:43,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 16:39:43,125 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:43,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:43,125 INFO L82 PathProgramCache]: Analyzing trace with hash 246910477, now seen corresponding path program 33 times [2021-08-21 16:39:43,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:43,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130097349] [2021-08-21 16:39:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:43,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:43,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:43,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130097349] [2021-08-21 16:39:43,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130097349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:43,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662363147] [2021-08-21 16:39:43,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:39:43,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:43,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:43,281 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:43,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 16:39:45,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:39:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:45,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:46,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662363147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:46,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:46,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:46,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438143314] [2021-08-21 16:39:46,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:46,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:46,498 INFO L87 Difference]: Start difference. First operand 1766 states and 2276 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:47,026 INFO L93 Difference]: Finished difference Result 3221 states and 4071 transitions. [2021-08-21 16:39:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:39:47,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:47,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:47,029 INFO L225 Difference]: With dead ends: 3221 [2021-08-21 16:39:47,029 INFO L226 Difference]: Without dead ends: 3141 [2021-08-21 16:39:47,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 601.6ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 16:39:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2021-08-21 16:39:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 1766. [2021-08-21 16:39:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1755 states have (on average 1.2968660968660968) internal successors, (2276), 1765 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2276 transitions. [2021-08-21 16:39:47,045 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2276 transitions. Word has length 67 [2021-08-21 16:39:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:47,045 INFO L470 AbstractCegarLoop]: Abstraction has 1766 states and 2276 transitions. [2021-08-21 16:39:47,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2276 transitions. [2021-08-21 16:39:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:47,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:47,047 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:47,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 16:39:47,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:47,248 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash 307609119, now seen corresponding path program 34 times [2021-08-21 16:39:47,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:47,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805788173] [2021-08-21 16:39:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:47,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:47,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:47,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805788173] [2021-08-21 16:39:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805788173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:47,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256812467] [2021-08-21 16:39:47,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:39:47,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:47,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:47,385 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:47,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 16:39:50,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:39:50,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:50,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:50,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256812467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:50,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:50,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:50,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314571024] [2021-08-21 16:39:50,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:50,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:50,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:50,682 INFO L87 Difference]: Start difference. First operand 1766 states and 2276 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:51,212 INFO L93 Difference]: Finished difference Result 3447 states and 4329 transitions. [2021-08-21 16:39:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:39:51,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:51,217 INFO L225 Difference]: With dead ends: 3447 [2021-08-21 16:39:51,217 INFO L226 Difference]: Without dead ends: 3367 [2021-08-21 16:39:51,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=476, Invalid=1330, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 16:39:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-08-21 16:39:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 1825. [2021-08-21 16:39:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1814 states have (on average 1.2949283351708931) internal successors, (2349), 1824 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2349 transitions. [2021-08-21 16:39:51,234 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2349 transitions. Word has length 67 [2021-08-21 16:39:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:51,234 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2349 transitions. [2021-08-21 16:39:51,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2349 transitions. [2021-08-21 16:39:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:51,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:51,236 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:51,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 16:39:51,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:51,437 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -32799087, now seen corresponding path program 35 times [2021-08-21 16:39:51,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:51,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64014430] [2021-08-21 16:39:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:51,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:51,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:51,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64014430] [2021-08-21 16:39:51,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64014430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:51,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471040305] [2021-08-21 16:39:51,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:39:51,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:51,597 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:51,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 16:39:54,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:39:54,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:54,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:54,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:54,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471040305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:54,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:54,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:54,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946505369] [2021-08-21 16:39:54,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:54,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:54,900 INFO L87 Difference]: Start difference. First operand 1825 states and 2349 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:55,503 INFO L93 Difference]: Finished difference Result 3492 states and 4388 transitions. [2021-08-21 16:39:55,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:39:55,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:55,507 INFO L225 Difference]: With dead ends: 3492 [2021-08-21 16:39:55,507 INFO L226 Difference]: Without dead ends: 3412 [2021-08-21 16:39:55,507 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=544, Invalid=1526, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 16:39:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-08-21 16:39:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 1860. [2021-08-21 16:39:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1849 states have (on average 1.2990805840995132) internal successors, (2402), 1859 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:55,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2402 transitions. [2021-08-21 16:39:55,524 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2402 transitions. Word has length 67 [2021-08-21 16:39:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:55,524 INFO L470 AbstractCegarLoop]: Abstraction has 1860 states and 2402 transitions. [2021-08-21 16:39:55,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2402 transitions. [2021-08-21 16:39:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:55,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:55,526 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:55,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 16:39:55,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:55,727 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:39:55,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:39:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1953455831, now seen corresponding path program 36 times [2021-08-21 16:39:55,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:39:55,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125443247] [2021-08-21 16:39:55,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:39:55,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:39:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:39:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:55,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:39:55,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125443247] [2021-08-21 16:39:55,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125443247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:55,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074405509] [2021-08-21 16:39:55,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:39:55,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:39:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:39:55,925 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:39:55,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 16:39:58,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:39:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:39:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:39:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:39:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:39:59,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074405509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:39:59,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:39:59,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:39:59,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935900697] [2021-08-21 16:39:59,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:39:59,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:39:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:39:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:39:59,273 INFO L87 Difference]: Start difference. First operand 1860 states and 2402 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:39:59,865 INFO L93 Difference]: Finished difference Result 3340 states and 4212 transitions. [2021-08-21 16:39:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:39:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:39:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:39:59,870 INFO L225 Difference]: With dead ends: 3340 [2021-08-21 16:39:59,870 INFO L226 Difference]: Without dead ends: 3260 [2021-08-21 16:39:59,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=522, Invalid=1458, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:39:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-08-21 16:39:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 1845. [2021-08-21 16:39:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1834 states have (on average 1.2982551799345692) internal successors, (2381), 1844 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2381 transitions. [2021-08-21 16:39:59,887 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2381 transitions. Word has length 67 [2021-08-21 16:39:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:39:59,887 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 2381 transitions. [2021-08-21 16:39:59,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:39:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2381 transitions. [2021-08-21 16:39:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:39:59,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:39:59,889 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:39:59,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:00,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-21 16:40:00,090 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1902378207, now seen corresponding path program 37 times [2021-08-21 16:40:00,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:00,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545069608] [2021-08-21 16:40:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:00,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:00,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:00,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545069608] [2021-08-21 16:40:00,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545069608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:00,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962112561] [2021-08-21 16:40:00,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:40:00,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:00,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:00,225 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:00,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 16:40:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:03,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962112561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:03,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:03,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:03,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184316051] [2021-08-21 16:40:03,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:03,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:03,632 INFO L87 Difference]: Start difference. First operand 1845 states and 2381 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:04,245 INFO L93 Difference]: Finished difference Result 3436 states and 4308 transitions. [2021-08-21 16:40:04,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 16:40:04,246 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:04,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:04,251 INFO L225 Difference]: With dead ends: 3436 [2021-08-21 16:40:04,251 INFO L226 Difference]: Without dead ends: 3356 [2021-08-21 16:40:04,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 637.3ms TimeCoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 16:40:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-08-21 16:40:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 1850. [2021-08-21 16:40:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1839 states have (on average 1.3007069059271343) internal successors, (2392), 1849 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2392 transitions. [2021-08-21 16:40:04,277 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2392 transitions. Word has length 67 [2021-08-21 16:40:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:04,278 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2392 transitions. [2021-08-21 16:40:04,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2392 transitions. [2021-08-21 16:40:04,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:04,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:04,280 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:04,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:04,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 16:40:04,497 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1206199123, now seen corresponding path program 38 times [2021-08-21 16:40:04,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:04,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057809500] [2021-08-21 16:40:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:04,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:04,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:04,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057809500] [2021-08-21 16:40:04,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057809500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:04,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941705111] [2021-08-21 16:40:04,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:04,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:04,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:04,638 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:04,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 16:40:07,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:07,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:07,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:08,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941705111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:08,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:08,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:08,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189046570] [2021-08-21 16:40:08,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:08,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:08,235 INFO L87 Difference]: Start difference. First operand 1850 states and 2392 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:08,704 INFO L93 Difference]: Finished difference Result 3195 states and 4017 transitions. [2021-08-21 16:40:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:40:08,705 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:08,707 INFO L225 Difference]: With dead ends: 3195 [2021-08-21 16:40:08,708 INFO L226 Difference]: Without dead ends: 3115 [2021-08-21 16:40:08,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=446, Invalid=1276, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 16:40:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-08-21 16:40:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 1850. [2021-08-21 16:40:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1839 states have (on average 1.3007069059271343) internal successors, (2392), 1849 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2392 transitions. [2021-08-21 16:40:08,723 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2392 transitions. Word has length 67 [2021-08-21 16:40:08,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:08,724 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2392 transitions. [2021-08-21 16:40:08,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:08,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2392 transitions. [2021-08-21 16:40:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:08,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:08,725 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:08,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 16:40:08,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:08,926 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1417856563, now seen corresponding path program 39 times [2021-08-21 16:40:08,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:08,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019118860] [2021-08-21 16:40:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:08,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:09,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:09,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019118860] [2021-08-21 16:40:09,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019118860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:09,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911246541] [2021-08-21 16:40:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:09,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:09,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:09,061 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:09,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 16:40:12,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:40:12,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:12,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:12,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911246541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:12,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:12,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:12,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137047563] [2021-08-21 16:40:12,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:12,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:12,581 INFO L87 Difference]: Start difference. First operand 1850 states and 2392 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:13,022 INFO L93 Difference]: Finished difference Result 3352 states and 4212 transitions. [2021-08-21 16:40:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:40:13,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:13,026 INFO L225 Difference]: With dead ends: 3352 [2021-08-21 16:40:13,026 INFO L226 Difference]: Without dead ends: 3272 [2021-08-21 16:40:13,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:40:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-08-21 16:40:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 1865. [2021-08-21 16:40:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1854 states have (on average 1.2998921251348436) internal successors, (2410), 1864 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2410 transitions. [2021-08-21 16:40:13,042 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2410 transitions. Word has length 67 [2021-08-21 16:40:13,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:13,042 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 2410 transitions. [2021-08-21 16:40:13,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:13,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2410 transitions. [2021-08-21 16:40:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:13,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:13,044 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:13,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 16:40:13,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:13,245 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash 956453989, now seen corresponding path program 40 times [2021-08-21 16:40:13,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:13,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435781062] [2021-08-21 16:40:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:13,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:13,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:13,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435781062] [2021-08-21 16:40:13,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435781062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:13,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958425837] [2021-08-21 16:40:13,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:40:13,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:13,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:13,396 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:13,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 16:40:16,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:40:16,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:16,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:17,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958425837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:17,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:17,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:17,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325642191] [2021-08-21 16:40:17,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:17,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:17,060 INFO L87 Difference]: Start difference. First operand 1865 states and 2410 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:17,541 INFO L93 Difference]: Finished difference Result 3530 states and 4426 transitions. [2021-08-21 16:40:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:40:17,541 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:17,545 INFO L225 Difference]: With dead ends: 3530 [2021-08-21 16:40:17,545 INFO L226 Difference]: Without dead ends: 3450 [2021-08-21 16:40:17,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 538.9ms TimeCoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 16:40:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-08-21 16:40:17,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 1850. [2021-08-21 16:40:17,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1839 states have (on average 1.3007069059271343) internal successors, (2392), 1849 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2392 transitions. [2021-08-21 16:40:17,562 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2392 transitions. Word has length 67 [2021-08-21 16:40:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:17,562 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2392 transitions. [2021-08-21 16:40:17,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2392 transitions. [2021-08-21 16:40:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:17,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:17,565 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:17,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 16:40:17,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 16:40:17,766 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1208084275, now seen corresponding path program 41 times [2021-08-21 16:40:17,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:17,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788802001] [2021-08-21 16:40:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:17,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:17,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:17,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:17,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788802001] [2021-08-21 16:40:17,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788802001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:17,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864899767] [2021-08-21 16:40:17,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:40:17,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:17,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:17,905 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:17,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 16:40:20,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:40:20,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864899767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:21,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:21,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75299309] [2021-08-21 16:40:21,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:21,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:21,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:21,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:21,506 INFO L87 Difference]: Start difference. First operand 1850 states and 2392 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:21,973 INFO L93 Difference]: Finished difference Result 3586 states and 4490 transitions. [2021-08-21 16:40:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:40:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:21,977 INFO L225 Difference]: With dead ends: 3586 [2021-08-21 16:40:21,977 INFO L226 Difference]: Without dead ends: 3506 [2021-08-21 16:40:21,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=498, Invalid=1394, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:40:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-08-21 16:40:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 1850. [2021-08-21 16:40:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1839 states have (on average 1.3007069059271343) internal successors, (2392), 1849 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2392 transitions. [2021-08-21 16:40:21,995 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2392 transitions. Word has length 67 [2021-08-21 16:40:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:21,995 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2392 transitions. [2021-08-21 16:40:21,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2392 transitions. [2021-08-21 16:40:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:21,997 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:21,997 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:22,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 16:40:22,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 16:40:22,201 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash -869849151, now seen corresponding path program 42 times [2021-08-21 16:40:22,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:22,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087992653] [2021-08-21 16:40:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:22,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:22,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:22,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087992653] [2021-08-21 16:40:22,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087992653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:22,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798063883] [2021-08-21 16:40:22,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:40:22,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:22,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:22,344 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:22,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 16:40:25,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:40:25,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:25,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:26,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798063883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:26,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:26,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:26,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370017292] [2021-08-21 16:40:26,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:26,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:26,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:26,010 INFO L87 Difference]: Start difference. First operand 1850 states and 2392 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:26,469 INFO L93 Difference]: Finished difference Result 3485 states and 4383 transitions. [2021-08-21 16:40:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:40:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:26,473 INFO L225 Difference]: With dead ends: 3485 [2021-08-21 16:40:26,474 INFO L226 Difference]: Without dead ends: 3405 [2021-08-21 16:40:26,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=453, Invalid=1269, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 16:40:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3405 states. [2021-08-21 16:40:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3405 to 1825. [2021-08-21 16:40:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1814 states have (on average 1.3015435501653805) internal successors, (2361), 1824 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2361 transitions. [2021-08-21 16:40:26,492 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2361 transitions. Word has length 67 [2021-08-21 16:40:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:26,493 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 2361 transitions. [2021-08-21 16:40:26,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2361 transitions. [2021-08-21 16:40:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:26,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:26,494 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:26,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 16:40:26,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:26,695 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:26,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1721899943, now seen corresponding path program 43 times [2021-08-21 16:40:26,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:26,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714293460] [2021-08-21 16:40:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:26,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:26,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:26,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714293460] [2021-08-21 16:40:26,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714293460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:26,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663943990] [2021-08-21 16:40:26,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:40:26,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:26,829 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:26,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 16:40:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:30,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663943990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:30,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:30,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:30,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361541426] [2021-08-21 16:40:30,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:30,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:30,600 INFO L87 Difference]: Start difference. First operand 1825 states and 2361 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:31,046 INFO L93 Difference]: Finished difference Result 3405 states and 4271 transitions. [2021-08-21 16:40:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 16:40:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:31,050 INFO L225 Difference]: With dead ends: 3405 [2021-08-21 16:40:31,050 INFO L226 Difference]: Without dead ends: 3325 [2021-08-21 16:40:31,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:40:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2021-08-21 16:40:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 1845. [2021-08-21 16:40:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1834 states have (on average 1.2982551799345692) internal successors, (2381), 1844 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2381 transitions. [2021-08-21 16:40:31,067 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2381 transitions. Word has length 67 [2021-08-21 16:40:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:31,068 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 2381 transitions. [2021-08-21 16:40:31,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2381 transitions. [2021-08-21 16:40:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:31,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:31,069 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:31,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 16:40:31,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 16:40:31,270 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash 652410609, now seen corresponding path program 44 times [2021-08-21 16:40:31,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:31,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165366572] [2021-08-21 16:40:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:31,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:31,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:31,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165366572] [2021-08-21 16:40:31,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165366572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:31,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929244822] [2021-08-21 16:40:31,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:31,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:31,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:31,415 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:31,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 16:40:34,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:34,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:34,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:35,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929244822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:35,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:35,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:35,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68688262] [2021-08-21 16:40:35,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:35,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:35,326 INFO L87 Difference]: Start difference. First operand 1845 states and 2381 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:35,763 INFO L93 Difference]: Finished difference Result 3279 states and 4117 transitions. [2021-08-21 16:40:35,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:40:35,764 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:35,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:35,767 INFO L225 Difference]: With dead ends: 3279 [2021-08-21 16:40:35,767 INFO L226 Difference]: Without dead ends: 3199 [2021-08-21 16:40:35,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:40:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2021-08-21 16:40:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 1810. [2021-08-21 16:40:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1799 states have (on average 1.294052251250695) internal successors, (2328), 1809 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2328 transitions. [2021-08-21 16:40:35,783 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2328 transitions. Word has length 67 [2021-08-21 16:40:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:35,784 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2328 transitions. [2021-08-21 16:40:35,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2328 transitions. [2021-08-21 16:40:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:35,785 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:35,785 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:35,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 16:40:35,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:35,986 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:35,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1261125341, now seen corresponding path program 14 times [2021-08-21 16:40:35,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:35,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370715003] [2021-08-21 16:40:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:35,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:36,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:36,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370715003] [2021-08-21 16:40:36,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370715003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:36,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285309269] [2021-08-21 16:40:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:40:36,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:36,140 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:36,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 16:40:39,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:40:39,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:39,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:40,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285309269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:40,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:40,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:40,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678230568] [2021-08-21 16:40:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:40,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:40,004 INFO L87 Difference]: Start difference. First operand 1810 states and 2328 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:40,188 INFO L93 Difference]: Finished difference Result 2751 states and 3465 transitions. [2021-08-21 16:40:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:40:40,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:40,190 INFO L225 Difference]: With dead ends: 2751 [2021-08-21 16:40:40,190 INFO L226 Difference]: Without dead ends: 2671 [2021-08-21 16:40:40,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-08-21 16:40:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-08-21 16:40:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 1815. [2021-08-21 16:40:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1804 states have (on average 1.2965631929046564) internal successors, (2339), 1814 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2339 transitions. [2021-08-21 16:40:40,206 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2339 transitions. Word has length 67 [2021-08-21 16:40:40,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:40,206 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 2339 transitions. [2021-08-21 16:40:40,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2339 transitions. [2021-08-21 16:40:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:40,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:40,207 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:40,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 16:40:40,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:40,408 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash -30877245, now seen corresponding path program 15 times [2021-08-21 16:40:40,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:40,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618997328] [2021-08-21 16:40:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:40,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:40,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:40,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618997328] [2021-08-21 16:40:40,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618997328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:40,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160135985] [2021-08-21 16:40:40,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:40,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:40,593 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:40,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 16:40:44,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 16:40:44,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:44,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160135985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:44,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:44,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231476641] [2021-08-21 16:40:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:44,535 INFO L87 Difference]: Start difference. First operand 1815 states and 2339 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:45,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:45,000 INFO L93 Difference]: Finished difference Result 3312 states and 4188 transitions. [2021-08-21 16:40:45,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 16:40:45,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:45,004 INFO L225 Difference]: With dead ends: 3312 [2021-08-21 16:40:45,004 INFO L226 Difference]: Without dead ends: 3152 [2021-08-21 16:40:45,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=421, Invalid=1471, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:40:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-08-21 16:40:45,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 1815. [2021-08-21 16:40:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1804 states have (on average 1.2965631929046564) internal successors, (2339), 1814 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2339 transitions. [2021-08-21 16:40:45,025 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2339 transitions. Word has length 67 [2021-08-21 16:40:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:45,026 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 2339 transitions. [2021-08-21 16:40:45,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2339 transitions. [2021-08-21 16:40:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:45,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:45,028 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:45,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-21 16:40:45,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-21 16:40:45,229 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash -570601545, now seen corresponding path program 45 times [2021-08-21 16:40:45,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:45,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553855409] [2021-08-21 16:40:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:45,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:45,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:45,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553855409] [2021-08-21 16:40:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553855409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:45,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196110194] [2021-08-21 16:40:45,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:40:45,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:45,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:45,361 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:45,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 16:40:48,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:40:48,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:48,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:49,282 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:49,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196110194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:49,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:49,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:49,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814423125] [2021-08-21 16:40:49,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:49,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:49,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:49,283 INFO L87 Difference]: Start difference. First operand 1815 states and 2339 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:49,614 INFO L93 Difference]: Finished difference Result 3000 states and 3780 transitions. [2021-08-21 16:40:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:40:49,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:49,618 INFO L225 Difference]: With dead ends: 3000 [2021-08-21 16:40:49,618 INFO L226 Difference]: Without dead ends: 2920 [2021-08-21 16:40:49,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:40:49,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-08-21 16:40:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1810. [2021-08-21 16:40:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1799 states have (on average 1.294052251250695) internal successors, (2328), 1809 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:49,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2328 transitions. [2021-08-21 16:40:49,633 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2328 transitions. Word has length 67 [2021-08-21 16:40:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:49,633 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2328 transitions. [2021-08-21 16:40:49,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2328 transitions. [2021-08-21 16:40:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:49,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:49,634 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:49,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 16:40:49,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:49,835 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:49,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1376487191, now seen corresponding path program 46 times [2021-08-21 16:40:49,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:49,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333800350] [2021-08-21 16:40:49,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:49,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:50,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:50,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333800350] [2021-08-21 16:40:50,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333800350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:50,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169832021] [2021-08-21 16:40:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:40:50,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:50,008 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:50,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 16:40:53,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:40:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:53,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:53,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169832021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:53,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:53,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:53,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620900423] [2021-08-21 16:40:53,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:53,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:53,944 INFO L87 Difference]: Start difference. First operand 1810 states and 2328 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:54,555 INFO L93 Difference]: Finished difference Result 3751 states and 4737 transitions. [2021-08-21 16:40:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:40:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:54,559 INFO L225 Difference]: With dead ends: 3751 [2021-08-21 16:40:54,559 INFO L226 Difference]: Without dead ends: 3591 [2021-08-21 16:40:54,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=552, Invalid=1998, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 16:40:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-08-21 16:40:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 1812. [2021-08-21 16:40:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1801 states have (on average 1.2937257079400333) internal successors, (2330), 1811 states have internal predecessors, (2330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2330 transitions. [2021-08-21 16:40:54,578 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2330 transitions. Word has length 67 [2021-08-21 16:40:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:54,578 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 2330 transitions. [2021-08-21 16:40:54,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2330 transitions. [2021-08-21 16:40:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:54,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:54,580 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:54,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-21 16:40:54,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:54,781 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:40:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:40:54,781 INFO L82 PathProgramCache]: Analyzing trace with hash 218850425, now seen corresponding path program 47 times [2021-08-21 16:40:54,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:40:54,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485547395] [2021-08-21 16:40:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:40:54,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:40:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:40:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:54,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:40:54,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485547395] [2021-08-21 16:40:54,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485547395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:54,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786306540] [2021-08-21 16:40:54,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:40:54,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:40:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:40:54,942 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:40:54,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 16:40:58,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:40:58,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:40:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:40:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:40:59,005 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:40:59,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786306540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:40:59,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:40:59,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:40:59,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592244304] [2021-08-21 16:40:59,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:40:59,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:40:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:40:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:40:59,006 INFO L87 Difference]: Start difference. First operand 1812 states and 2330 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:40:59,906 INFO L93 Difference]: Finished difference Result 3940 states and 4972 transitions. [2021-08-21 16:40:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:40:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:40:59,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:40:59,910 INFO L225 Difference]: With dead ends: 3940 [2021-08-21 16:40:59,910 INFO L226 Difference]: Without dead ends: 3780 [2021-08-21 16:40:59,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 909.4ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:40:59,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-08-21 16:40:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 1820. [2021-08-21 16:40:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1809 states have (on average 1.2924267551133222) internal successors, (2338), 1819 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2338 transitions. [2021-08-21 16:40:59,928 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2338 transitions. Word has length 67 [2021-08-21 16:40:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:40:59,928 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 2338 transitions. [2021-08-21 16:40:59,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:40:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2338 transitions. [2021-08-21 16:40:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:40:59,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:40:59,930 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:40:59,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 16:41:00,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:00,130 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:00,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1346500941, now seen corresponding path program 48 times [2021-08-21 16:41:00,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:00,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104413327] [2021-08-21 16:41:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:00,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:00,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:00,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104413327] [2021-08-21 16:41:00,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104413327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:00,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612018192] [2021-08-21 16:41:00,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:41:00,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:00,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:00,263 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:00,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 16:41:03,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:41:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:04,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612018192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:04,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:04,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 16:41:04,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982177153] [2021-08-21 16:41:04,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:41:04,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:41:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:41:04,354 INFO L87 Difference]: Start difference. First operand 1820 states and 2338 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:05,722 INFO L93 Difference]: Finished difference Result 4844 states and 6128 transitions. [2021-08-21 16:41:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 16:41:05,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:05,727 INFO L225 Difference]: With dead ends: 4844 [2021-08-21 16:41:05,727 INFO L226 Difference]: Without dead ends: 4604 [2021-08-21 16:41:05,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1326.4ms TimeCoverageRelationStatistics Valid=1124, Invalid=4132, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 16:41:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2021-08-21 16:41:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 1925. [2021-08-21 16:41:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1914 states have (on average 1.2983281086729364) internal successors, (2485), 1924 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2485 transitions. [2021-08-21 16:41:05,748 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2485 transitions. Word has length 67 [2021-08-21 16:41:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:05,749 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 2485 transitions. [2021-08-21 16:41:05,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2485 transitions. [2021-08-21 16:41:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:05,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:05,750 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:05,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 16:41:05,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 16:41:05,951 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:05,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:05,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1063059585, now seen corresponding path program 49 times [2021-08-21 16:41:05,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:05,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724157064] [2021-08-21 16:41:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:05,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:06,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:06,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724157064] [2021-08-21 16:41:06,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724157064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:06,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438541774] [2021-08-21 16:41:06,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:41:06,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:06,112 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:06,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 16:41:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:09,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:09,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:10,333 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:10,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438541774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:10,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:10,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:41:10,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717254143] [2021-08-21 16:41:10,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:41:10,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:41:10,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:41:10,334 INFO L87 Difference]: Start difference. First operand 1925 states and 2485 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:11,618 INFO L93 Difference]: Finished difference Result 4072 states and 5132 transitions. [2021-08-21 16:41:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 16:41:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:11,622 INFO L225 Difference]: With dead ends: 4072 [2021-08-21 16:41:11,623 INFO L226 Difference]: Without dead ends: 3912 [2021-08-21 16:41:11,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1271.9ms TimeCoverageRelationStatistics Valid=880, Invalid=3026, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 16:41:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3912 states. [2021-08-21 16:41:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3912 to 1895. [2021-08-21 16:41:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1884 states have (on average 1.2967091295116773) internal successors, (2443), 1894 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 2443 transitions. [2021-08-21 16:41:11,644 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 2443 transitions. Word has length 67 [2021-08-21 16:41:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:11,644 INFO L470 AbstractCegarLoop]: Abstraction has 1895 states and 2443 transitions. [2021-08-21 16:41:11,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 2443 transitions. [2021-08-21 16:41:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:11,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:11,646 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:11,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 16:41:11,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:11,847 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:11,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:11,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2110447927, now seen corresponding path program 50 times [2021-08-21 16:41:11,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:11,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610885946] [2021-08-21 16:41:11,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:11,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:12,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:12,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610885946] [2021-08-21 16:41:12,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610885946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:12,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60631854] [2021-08-21 16:41:12,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:41:12,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:12,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:12,001 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:12,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 16:41:15,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:41:15,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:16,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60631854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:16,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:16,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 16:41:16,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589665784] [2021-08-21 16:41:16,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:41:16,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:41:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:41:16,196 INFO L87 Difference]: Start difference. First operand 1895 states and 2443 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:17,739 INFO L93 Difference]: Finished difference Result 5039 states and 6337 transitions. [2021-08-21 16:41:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 16:41:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:17,743 INFO L225 Difference]: With dead ends: 5039 [2021-08-21 16:41:17,743 INFO L226 Difference]: Without dead ends: 4799 [2021-08-21 16:41:17,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 1476.9ms TimeCoverageRelationStatistics Valid=1267, Invalid=4585, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 16:41:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2021-08-21 16:41:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 2009. [2021-08-21 16:41:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1998 states have (on average 1.2917917917917918) internal successors, (2581), 2008 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:17,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2581 transitions. [2021-08-21 16:41:17,766 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2581 transitions. Word has length 67 [2021-08-21 16:41:17,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:17,766 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2581 transitions. [2021-08-21 16:41:17,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2581 transitions. [2021-08-21 16:41:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:17,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:17,769 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:17,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 16:41:17,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:17,984 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:17,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:17,984 INFO L82 PathProgramCache]: Analyzing trace with hash 498535031, now seen corresponding path program 51 times [2021-08-21 16:41:17,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:17,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506537600] [2021-08-21 16:41:17,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:17,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:18,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:18,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506537600] [2021-08-21 16:41:18,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506537600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:18,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753207330] [2021-08-21 16:41:18,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:41:18,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:18,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:18,117 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:18,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 16:41:21,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:41:21,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:21,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:22,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753207330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:22,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:22,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:41:22,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076645447] [2021-08-21 16:41:22,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:41:22,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:22,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:41:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:41:22,426 INFO L87 Difference]: Start difference. First operand 2009 states and 2581 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:24,001 INFO L93 Difference]: Finished difference Result 4537 states and 5723 transitions. [2021-08-21 16:41:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 16:41:24,002 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:24,006 INFO L225 Difference]: With dead ends: 4537 [2021-08-21 16:41:24,006 INFO L226 Difference]: Without dead ends: 4377 [2021-08-21 16:41:24,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1525.2ms TimeCoverageRelationStatistics Valid=1271, Invalid=4279, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 16:41:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-08-21 16:41:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 1988. [2021-08-21 16:41:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1977 states have (on average 1.2938796155791603) internal successors, (2558), 1987 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:24,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2558 transitions. [2021-08-21 16:41:24,040 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2558 transitions. Word has length 67 [2021-08-21 16:41:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:24,040 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 2558 transitions. [2021-08-21 16:41:24,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2558 transitions. [2021-08-21 16:41:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:24,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:24,042 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:24,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 16:41:24,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-08-21 16:41:24,244 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash 935428281, now seen corresponding path program 52 times [2021-08-21 16:41:24,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:24,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534922413] [2021-08-21 16:41:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:24,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:24,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:24,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534922413] [2021-08-21 16:41:24,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534922413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:24,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174849747] [2021-08-21 16:41:24,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:41:24,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:24,383 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:24,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 16:41:28,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:41:28,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174849747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:28,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:28,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:41:28,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008365159] [2021-08-21 16:41:28,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:41:28,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:41:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:41:28,711 INFO L87 Difference]: Start difference. First operand 1988 states and 2558 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:30,310 INFO L93 Difference]: Finished difference Result 4230 states and 5346 transitions. [2021-08-21 16:41:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-21 16:41:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:30,314 INFO L225 Difference]: With dead ends: 4230 [2021-08-21 16:41:30,314 INFO L226 Difference]: Without dead ends: 4070 [2021-08-21 16:41:30,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 1554.4ms TimeCoverageRelationStatistics Valid=1396, Invalid=4924, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 16:41:30,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4070 states. [2021-08-21 16:41:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4070 to 2013. [2021-08-21 16:41:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2002 states have (on average 1.2932067932067932) internal successors, (2589), 2012 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 2589 transitions. [2021-08-21 16:41:30,333 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 2589 transitions. Word has length 67 [2021-08-21 16:41:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 2013 states and 2589 transitions. [2021-08-21 16:41:30,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 2589 transitions. [2021-08-21 16:41:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:30,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:30,335 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:30,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 16:41:30,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:30,536 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1464184763, now seen corresponding path program 53 times [2021-08-21 16:41:30,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:30,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739109327] [2021-08-21 16:41:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:30,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:30,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:30,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739109327] [2021-08-21 16:41:30,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739109327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:30,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859480306] [2021-08-21 16:41:30,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:41:30,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:30,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:30,696 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:30,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 16:41:34,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:41:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:34,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:35,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859480306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:35,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:35,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:41:35,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428816994] [2021-08-21 16:41:35,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:41:35,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:41:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:41:35,067 INFO L87 Difference]: Start difference. First operand 2013 states and 2589 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:36,516 INFO L93 Difference]: Finished difference Result 4229 states and 5371 transitions. [2021-08-21 16:41:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-21 16:41:36,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:36,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:36,520 INFO L225 Difference]: With dead ends: 4229 [2021-08-21 16:41:36,520 INFO L226 Difference]: Without dead ends: 4069 [2021-08-21 16:41:36,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1391.1ms TimeCoverageRelationStatistics Valid=1247, Invalid=4303, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 16:41:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4069 states. [2021-08-21 16:41:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4069 to 1971. [2021-08-21 16:41:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1960 states have (on average 1.2892857142857144) internal successors, (2527), 1970 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2527 transitions. [2021-08-21 16:41:36,541 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2527 transitions. Word has length 67 [2021-08-21 16:41:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:36,541 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 2527 transitions. [2021-08-21 16:41:36,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2527 transitions. [2021-08-21 16:41:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:36,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:36,543 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:36,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 16:41:36,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:36,744 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2029386035, now seen corresponding path program 54 times [2021-08-21 16:41:36,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:36,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624696581] [2021-08-21 16:41:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:36,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:36,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:36,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624696581] [2021-08-21 16:41:36,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624696581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:36,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220457380] [2021-08-21 16:41:36,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:41:36,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:36,915 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:36,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 16:41:40,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:41:40,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:41,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220457380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:41,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:41,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 16:41:41,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751988304] [2021-08-21 16:41:41,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 16:41:41,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:41,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 16:41:41,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-08-21 16:41:41,318 INFO L87 Difference]: Start difference. First operand 1971 states and 2527 transitions. Second operand has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:43,061 INFO L93 Difference]: Finished difference Result 5104 states and 6441 transitions. [2021-08-21 16:41:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 16:41:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:43,066 INFO L225 Difference]: With dead ends: 5104 [2021-08-21 16:41:43,066 INFO L226 Difference]: Without dead ends: 4744 [2021-08-21 16:41:43,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1649.6ms TimeCoverageRelationStatistics Valid=1655, Invalid=6001, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 16:41:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-08-21 16:41:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 2118. [2021-08-21 16:41:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2107 states have (on average 1.2833412434741338) internal successors, (2704), 2117 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2704 transitions. [2021-08-21 16:41:43,089 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2704 transitions. Word has length 67 [2021-08-21 16:41:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:43,089 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2704 transitions. [2021-08-21 16:41:43,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.434782608695652) internal successors, (125), 23 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2704 transitions. [2021-08-21 16:41:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:43,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:43,092 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:43,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 16:41:43,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:43,309 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash 417473139, now seen corresponding path program 55 times [2021-08-21 16:41:43,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:43,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356301654] [2021-08-21 16:41:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:43,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:43,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:43,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:43,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356301654] [2021-08-21 16:41:43,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356301654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:43,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002906160] [2021-08-21 16:41:43,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:41:43,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:43,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:43,445 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:43,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 16:41:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:47,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:47,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:48,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002906160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:48,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:48,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:41:48,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892935284] [2021-08-21 16:41:48,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:41:48,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:41:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:41:48,028 INFO L87 Difference]: Start difference. First operand 2118 states and 2704 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:49,478 INFO L93 Difference]: Finished difference Result 5141 states and 6451 transitions. [2021-08-21 16:41:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 16:41:49,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:49,483 INFO L225 Difference]: With dead ends: 5141 [2021-08-21 16:41:49,484 INFO L226 Difference]: Without dead ends: 4981 [2021-08-21 16:41:49,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 1379.2ms TimeCoverageRelationStatistics Valid=1406, Invalid=4446, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 16:41:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2021-08-21 16:41:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 2068. [2021-08-21 16:41:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2057 states have (on average 1.2843947496353914) internal successors, (2642), 2067 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2642 transitions. [2021-08-21 16:41:49,507 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2642 transitions. Word has length 67 [2021-08-21 16:41:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:49,507 INFO L470 AbstractCegarLoop]: Abstraction has 2068 states and 2642 transitions. [2021-08-21 16:41:49,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2642 transitions. [2021-08-21 16:41:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:49,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:49,509 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:49,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 16:41:49,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 16:41:49,710 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1545246655, now seen corresponding path program 56 times [2021-08-21 16:41:49,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:49,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410654353] [2021-08-21 16:41:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:49,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:49,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:49,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410654353] [2021-08-21 16:41:49,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410654353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:49,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160582492] [2021-08-21 16:41:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:41:49,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:49,890 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:49,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 16:41:53,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:41:53,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:41:53,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:41:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:41:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:54,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160582492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:54,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:41:54,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:41:54,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314125034] [2021-08-21 16:41:54,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:41:54,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:41:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:41:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:41:54,376 INFO L87 Difference]: Start difference. First operand 2068 states and 2642 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:56,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:41:56,040 INFO L93 Difference]: Finished difference Result 4924 states and 6188 transitions. [2021-08-21 16:41:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-21 16:41:56,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:41:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:41:56,045 INFO L225 Difference]: With dead ends: 4924 [2021-08-21 16:41:56,045 INFO L226 Difference]: Without dead ends: 4764 [2021-08-21 16:41:56,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1594.5ms TimeCoverageRelationStatistics Valid=1615, Invalid=5357, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 16:41:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4764 states. [2021-08-21 16:41:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4764 to 2027. [2021-08-21 16:41:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2016 states have (on average 1.285218253968254) internal successors, (2591), 2026 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2591 transitions. [2021-08-21 16:41:56,067 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2591 transitions. Word has length 67 [2021-08-21 16:41:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:41:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 2591 transitions. [2021-08-21 16:41:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:41:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2591 transitions. [2021-08-21 16:41:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:41:56,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:41:56,069 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:41:56,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 16:41:56,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 16:41:56,270 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:41:56,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:41:56,270 INFO L82 PathProgramCache]: Analyzing trace with hash -956063575, now seen corresponding path program 57 times [2021-08-21 16:41:56,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:41:56,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915297135] [2021-08-21 16:41:56,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:41:56,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:41:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:41:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:41:56,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:41:56,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915297135] [2021-08-21 16:41:56,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915297135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:41:56,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90022952] [2021-08-21 16:41:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:41:56,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:41:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:41:56,407 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:41:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 16:42:00,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:42:00,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:00,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90022952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:00,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:00,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:00,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854152414] [2021-08-21 16:42:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:00,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:00,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:00,912 INFO L87 Difference]: Start difference. First operand 2027 states and 2591 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:02,713 INFO L93 Difference]: Finished difference Result 4943 states and 6201 transitions. [2021-08-21 16:42:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-21 16:42:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:02,720 INFO L225 Difference]: With dead ends: 4943 [2021-08-21 16:42:02,720 INFO L226 Difference]: Without dead ends: 4783 [2021-08-21 16:42:02,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 1707.4ms TimeCoverageRelationStatistics Valid=1682, Invalid=5628, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 16:42:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-08-21 16:42:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 2002. [2021-08-21 16:42:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 1991 states have (on average 1.2837769964841788) internal successors, (2556), 2001 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 2556 transitions. [2021-08-21 16:42:02,747 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 2556 transitions. Word has length 67 [2021-08-21 16:42:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:02,747 INFO L470 AbstractCegarLoop]: Abstraction has 2002 states and 2556 transitions. [2021-08-21 16:42:02,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 2556 transitions. [2021-08-21 16:42:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:02,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:02,749 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:02,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 16:42:02,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-21 16:42:02,950 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1684292685, now seen corresponding path program 58 times [2021-08-21 16:42:02,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:02,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360698621] [2021-08-21 16:42:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:02,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:03,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:03,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360698621] [2021-08-21 16:42:03,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360698621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:03,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305405175] [2021-08-21 16:42:03,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:42:03,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:03,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:03,085 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:03,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 16:42:07,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:42:07,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:07,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:07,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305405175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:07,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:07,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:07,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186368019] [2021-08-21 16:42:07,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:07,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:07,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:07,618 INFO L87 Difference]: Start difference. First operand 2002 states and 2556 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:09,275 INFO L93 Difference]: Finished difference Result 4722 states and 5906 transitions. [2021-08-21 16:42:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-21 16:42:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:09,280 INFO L225 Difference]: With dead ends: 4722 [2021-08-21 16:42:09,280 INFO L226 Difference]: Without dead ends: 4562 [2021-08-21 16:42:09,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3118 ImplicationChecksByTransitivity, 1590.6ms TimeCoverageRelationStatistics Valid=1874, Invalid=6682, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 16:42:09,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-08-21 16:42:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 2036. [2021-08-21 16:42:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2025 states have (on average 1.2814814814814814) internal successors, (2595), 2035 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 2595 transitions. [2021-08-21 16:42:09,306 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 2595 transitions. Word has length 67 [2021-08-21 16:42:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:09,306 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 2595 transitions. [2021-08-21 16:42:09,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 2595 transitions. [2021-08-21 16:42:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:09,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:09,308 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:09,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 16:42:09,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 16:42:09,508 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1599368397, now seen corresponding path program 59 times [2021-08-21 16:42:09,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:09,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915195678] [2021-08-21 16:42:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:09,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:09,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:09,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915195678] [2021-08-21 16:42:09,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915195678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:09,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446350788] [2021-08-21 16:42:09,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:42:09,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:09,661 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:09,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 16:42:13,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:42:13,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:13,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:14,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446350788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:14,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:14,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:14,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391560075] [2021-08-21 16:42:14,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:14,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:14,283 INFO L87 Difference]: Start difference. First operand 2036 states and 2595 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:15,762 INFO L93 Difference]: Finished difference Result 4474 states and 5626 transitions. [2021-08-21 16:42:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-21 16:42:15,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:15,767 INFO L225 Difference]: With dead ends: 4474 [2021-08-21 16:42:15,767 INFO L226 Difference]: Without dead ends: 4314 [2021-08-21 16:42:15,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1395.6ms TimeCoverageRelationStatistics Valid=1570, Invalid=5236, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 16:42:15,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-08-21 16:42:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 2021. [2021-08-21 16:42:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2010 states have (on average 1.2791044776119402) internal successors, (2571), 2020 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2571 transitions. [2021-08-21 16:42:15,788 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2571 transitions. Word has length 67 [2021-08-21 16:42:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:15,788 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 2571 transitions. [2021-08-21 16:42:15,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2571 transitions. [2021-08-21 16:42:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:15,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:15,790 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:15,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 16:42:15,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:15,991 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -943172371, now seen corresponding path program 60 times [2021-08-21 16:42:15,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:15,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3777731] [2021-08-21 16:42:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:15,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:16,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:16,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3777731] [2021-08-21 16:42:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3777731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:16,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137512229] [2021-08-21 16:42:16,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:42:16,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:16,133 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:16,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 16:42:20,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:42:20,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:20,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:20,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137512229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:20,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:20,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:20,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664868646] [2021-08-21 16:42:20,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:20,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:20,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:20,840 INFO L87 Difference]: Start difference. First operand 2021 states and 2571 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:22,263 INFO L93 Difference]: Finished difference Result 5035 states and 6301 transitions. [2021-08-21 16:42:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 16:42:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:22,269 INFO L225 Difference]: With dead ends: 5035 [2021-08-21 16:42:22,269 INFO L226 Difference]: Without dead ends: 4875 [2021-08-21 16:42:22,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1988 ImplicationChecksByTransitivity, 1353.7ms TimeCoverageRelationStatistics Valid=1394, Invalid=4458, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 16:42:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2021-08-21 16:42:22,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 1996. [2021-08-21 16:42:22,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1996 states, 1985 states have (on average 1.279596977329975) internal successors, (2540), 1995 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1996 states to 1996 states and 2540 transitions. [2021-08-21 16:42:22,291 INFO L78 Accepts]: Start accepts. Automaton has 1996 states and 2540 transitions. Word has length 67 [2021-08-21 16:42:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:22,291 INFO L470 AbstractCegarLoop]: Abstraction has 1996 states and 2540 transitions. [2021-08-21 16:42:22,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1996 states and 2540 transitions. [2021-08-21 16:42:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:22,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:22,293 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:22,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 16:42:22,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:22,494 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:22,494 INFO L82 PathProgramCache]: Analyzing trace with hash 675618181, now seen corresponding path program 61 times [2021-08-21 16:42:22,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:22,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731674503] [2021-08-21 16:42:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:22,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:22,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:22,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731674503] [2021-08-21 16:42:22,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731674503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:22,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276078525] [2021-08-21 16:42:22,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:42:22,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:22,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:22,633 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:22,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 16:42:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:27,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276078525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:27,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:27,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:27,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615848285] [2021-08-21 16:42:27,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:27,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:27,355 INFO L87 Difference]: Start difference. First operand 1996 states and 2540 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:28,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:28,728 INFO L93 Difference]: Finished difference Result 4970 states and 6202 transitions. [2021-08-21 16:42:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-21 16:42:28,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:28,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:28,733 INFO L225 Difference]: With dead ends: 4970 [2021-08-21 16:42:28,733 INFO L226 Difference]: Without dead ends: 4810 [2021-08-21 16:42:28,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 1302.0ms TimeCoverageRelationStatistics Valid=1536, Invalid=5270, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 16:42:28,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-08-21 16:42:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 2027. [2021-08-21 16:42:28,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2016 states have (on average 1.2822420634920635) internal successors, (2585), 2026 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:28,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2585 transitions. [2021-08-21 16:42:28,755 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2585 transitions. Word has length 67 [2021-08-21 16:42:28,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:28,755 INFO L470 AbstractCegarLoop]: Abstraction has 2027 states and 2585 transitions. [2021-08-21 16:42:28,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2585 transitions. [2021-08-21 16:42:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:28,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:28,757 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:28,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 16:42:28,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:28,958 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:28,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1723994863, now seen corresponding path program 62 times [2021-08-21 16:42:28,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:28,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408745902] [2021-08-21 16:42:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:28,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:29,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:29,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408745902] [2021-08-21 16:42:29,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408745902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:29,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196428305] [2021-08-21 16:42:29,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:42:29,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:29,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:29,093 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:29,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 16:42:33,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:42:33,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:33,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:33,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:33,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196428305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:33,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:33,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:33,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005902016] [2021-08-21 16:42:33,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:33,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:33,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:33,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:33,794 INFO L87 Difference]: Start difference. First operand 2027 states and 2585 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:35,027 INFO L93 Difference]: Finished difference Result 4655 states and 5849 transitions. [2021-08-21 16:42:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 16:42:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:35,032 INFO L225 Difference]: With dead ends: 4655 [2021-08-21 16:42:35,032 INFO L226 Difference]: Without dead ends: 4495 [2021-08-21 16:42:35,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 1160.3ms TimeCoverageRelationStatistics Valid=1289, Invalid=4411, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 16:42:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-08-21 16:42:35,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 1967. [2021-08-21 16:42:35,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1956 states have (on average 1.278118609406953) internal successors, (2500), 1966 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 2500 transitions. [2021-08-21 16:42:35,053 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 2500 transitions. Word has length 67 [2021-08-21 16:42:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:35,053 INFO L470 AbstractCegarLoop]: Abstraction has 1967 states and 2500 transitions. [2021-08-21 16:42:35,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 2500 transitions. [2021-08-21 16:42:35,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:35,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:35,055 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:35,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 16:42:35,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:35,255 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:35,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:35,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1927201657, now seen corresponding path program 63 times [2021-08-21 16:42:35,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:35,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502523016] [2021-08-21 16:42:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:35,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:35,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:35,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502523016] [2021-08-21 16:42:35,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502523016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:35,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197421726] [2021-08-21 16:42:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:42:35,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:35,387 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:35,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 16:42:39,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:42:39,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:40,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197421726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:40,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:40,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:40,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363825256] [2021-08-21 16:42:40,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:40,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:40,280 INFO L87 Difference]: Start difference. First operand 1967 states and 2500 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:41,549 INFO L93 Difference]: Finished difference Result 4572 states and 5732 transitions. [2021-08-21 16:42:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 16:42:41,549 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:41,553 INFO L225 Difference]: With dead ends: 4572 [2021-08-21 16:42:41,554 INFO L226 Difference]: Without dead ends: 4412 [2021-08-21 16:42:41,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 1235.2ms TimeCoverageRelationStatistics Valid=1047, Invalid=3509, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 16:42:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-08-21 16:42:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 1943. [2021-08-21 16:42:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1932 states have (on average 1.2815734989648033) internal successors, (2476), 1942 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 2476 transitions. [2021-08-21 16:42:41,574 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 2476 transitions. Word has length 67 [2021-08-21 16:42:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:41,574 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 2476 transitions. [2021-08-21 16:42:41,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 2476 transitions. [2021-08-21 16:42:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:41,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:41,576 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:41,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 16:42:41,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:41,777 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:41,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:41,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1778582559, now seen corresponding path program 64 times [2021-08-21 16:42:41,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:41,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802237828] [2021-08-21 16:42:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:41,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:41,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:41,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802237828] [2021-08-21 16:42:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802237828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:41,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879591725] [2021-08-21 16:42:41,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:42:41,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:41,906 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:41,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 16:42:46,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:42:46,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:46,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:46,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879591725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:46,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:46,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:46,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223467273] [2021-08-21 16:42:46,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:46,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:46,865 INFO L87 Difference]: Start difference. First operand 1943 states and 2476 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:48,174 INFO L93 Difference]: Finished difference Result 4806 states and 6010 transitions. [2021-08-21 16:42:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 16:42:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:48,178 INFO L225 Difference]: With dead ends: 4806 [2021-08-21 16:42:48,179 INFO L226 Difference]: Without dead ends: 4646 [2021-08-21 16:42:48,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 1251.5ms TimeCoverageRelationStatistics Valid=1138, Invalid=3974, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 16:42:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-08-21 16:42:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 1916. [2021-08-21 16:42:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1905 states have (on average 1.2808398950131235) internal successors, (2440), 1915 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2440 transitions. [2021-08-21 16:42:48,200 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2440 transitions. Word has length 67 [2021-08-21 16:42:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:48,201 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2440 transitions. [2021-08-21 16:42:48,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2440 transitions. [2021-08-21 16:42:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 16:42:48,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:48,202 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:48,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 16:42:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-21 16:42:48,403 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash -74867719, now seen corresponding path program 65 times [2021-08-21 16:42:48,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:48,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586422890] [2021-08-21 16:42:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:48,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:48,530 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:48,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:48,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586422890] [2021-08-21 16:42:48,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586422890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:48,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023869068] [2021-08-21 16:42:48,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:42:48,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:48,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:48,531 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:48,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 16:42:52,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:42:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 16:42:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:53,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023869068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:53,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:53,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 16:42:53,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620941238] [2021-08-21 16:42:53,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 16:42:53,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 16:42:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-08-21 16:42:53,441 INFO L87 Difference]: Start difference. First operand 1916 states and 2440 transitions. Second operand has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:42:54,319 INFO L93 Difference]: Finished difference Result 4009 states and 5027 transitions. [2021-08-21 16:42:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:42:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 16:42:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:42:54,323 INFO L225 Difference]: With dead ends: 4009 [2021-08-21 16:42:54,323 INFO L226 Difference]: Without dead ends: 3849 [2021-08-21 16:42:54,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=778, Invalid=2762, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 16:42:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-08-21 16:42:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 1901. [2021-08-21 16:42:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1890 states have (on average 1.2735449735449735) internal successors, (2407), 1900 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2407 transitions. [2021-08-21 16:42:54,342 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2407 transitions. Word has length 67 [2021-08-21 16:42:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:42:54,342 INFO L470 AbstractCegarLoop]: Abstraction has 1901 states and 2407 transitions. [2021-08-21 16:42:54,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.636363636363637) internal successors, (124), 22 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:42:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2407 transitions. [2021-08-21 16:42:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:42:54,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:42:54,346 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:42:54,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 16:42:54,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-21 16:42:54,565 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:42:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:42:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash 438507014, now seen corresponding path program 16 times [2021-08-21 16:42:54,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:42:54,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274416928] [2021-08-21 16:42:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:42:54,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:42:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:42:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:54,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:42:54,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274416928] [2021-08-21 16:42:54,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274416928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:54,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779255794] [2021-08-21 16:42:54,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:42:54,744 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:42:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:42:54,745 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:42:54,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 16:42:59,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:42:59,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:42:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:42:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:42:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:42:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779255794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:42:59,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:42:59,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:42:59,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166870134] [2021-08-21 16:42:59,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:42:59,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:42:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:42:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:42:59,902 INFO L87 Difference]: Start difference. First operand 1901 states and 2407 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:00,027 INFO L93 Difference]: Finished difference Result 3067 states and 3837 transitions. [2021-08-21 16:43:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 16:43:00,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:00,030 INFO L225 Difference]: With dead ends: 3067 [2021-08-21 16:43:00,030 INFO L226 Difference]: Without dead ends: 2987 [2021-08-21 16:43:00,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-08-21 16:43:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2987 states. [2021-08-21 16:43:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2987 to 1931. [2021-08-21 16:43:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1920 states have (on average 1.2880208333333334) internal successors, (2473), 1930 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2473 transitions. [2021-08-21 16:43:00,045 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2473 transitions. Word has length 72 [2021-08-21 16:43:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:00,046 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 2473 transitions. [2021-08-21 16:43:00,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2473 transitions. [2021-08-21 16:43:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:00,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:00,047 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:00,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 16:43:00,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:00,248 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:00,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1267467744, now seen corresponding path program 66 times [2021-08-21 16:43:00,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:00,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949388295] [2021-08-21 16:43:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:00,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:00,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:00,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949388295] [2021-08-21 16:43:00,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949388295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:00,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980797945] [2021-08-21 16:43:00,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:43:00,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:00,503 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:00,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 16:43:05,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 16:43:05,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:43:05,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:05,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:43:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:05,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980797945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:05,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:43:05,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:43:05,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209246668] [2021-08-21 16:43:05,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:43:05,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:43:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:43:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:43:05,672 INFO L87 Difference]: Start difference. First operand 1931 states and 2473 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:05,956 INFO L93 Difference]: Finished difference Result 3252 states and 4060 transitions. [2021-08-21 16:43:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 16:43:05,956 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:05,959 INFO L225 Difference]: With dead ends: 3252 [2021-08-21 16:43:05,959 INFO L226 Difference]: Without dead ends: 3172 [2021-08-21 16:43:05,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 453.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 16:43:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-08-21 16:43:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 1926. [2021-08-21 16:43:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1915 states have (on average 1.2856396866840731) internal successors, (2462), 1925 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2462 transitions. [2021-08-21 16:43:05,976 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2462 transitions. Word has length 72 [2021-08-21 16:43:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:05,976 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 2462 transitions. [2021-08-21 16:43:05,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2462 transitions. [2021-08-21 16:43:05,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:05,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:05,978 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:06,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 16:43:06,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:06,179 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:06,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:06,180 INFO L82 PathProgramCache]: Analyzing trace with hash -938910576, now seen corresponding path program 67 times [2021-08-21 16:43:06,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:06,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915076735] [2021-08-21 16:43:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:06,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:06,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:06,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915076735] [2021-08-21 16:43:06,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915076735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:06,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741207558] [2021-08-21 16:43:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:43:06,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:06,406 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:06,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 16:43:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:10,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:10,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:43:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:11,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741207558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:11,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:43:11,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:43:11,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176192649] [2021-08-21 16:43:11,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:43:11,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:43:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:43:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:43:11,645 INFO L87 Difference]: Start difference. First operand 1926 states and 2462 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:12,020 INFO L93 Difference]: Finished difference Result 3546 states and 4422 transitions. [2021-08-21 16:43:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 16:43:12,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:12,024 INFO L225 Difference]: With dead ends: 3546 [2021-08-21 16:43:12,024 INFO L226 Difference]: Without dead ends: 3466 [2021-08-21 16:43:12,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 16:43:12,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3466 states. [2021-08-21 16:43:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3466 to 1921. [2021-08-21 16:43:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1910 states have (on average 1.2832460732984292) internal successors, (2451), 1920 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2451 transitions. [2021-08-21 16:43:12,041 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2451 transitions. Word has length 72 [2021-08-21 16:43:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:12,041 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 2451 transitions. [2021-08-21 16:43:12,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:12,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2451 transitions. [2021-08-21 16:43:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:12,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:12,043 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:12,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 16:43:12,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:12,244 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash -312645100, now seen corresponding path program 68 times [2021-08-21 16:43:12,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:12,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706931754] [2021-08-21 16:43:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:12,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:12,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:12,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706931754] [2021-08-21 16:43:12,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706931754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:12,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621658818] [2021-08-21 16:43:12,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:43:12,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:12,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:12,446 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:12,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 16:43:17,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:43:17,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:43:17,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:17,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:43:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:17,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621658818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:17,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:43:17,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:43:17,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932299179] [2021-08-21 16:43:17,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:43:17,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:43:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:43:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:43:17,728 INFO L87 Difference]: Start difference. First operand 1921 states and 2451 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:18,299 INFO L93 Difference]: Finished difference Result 3820 states and 4764 transitions. [2021-08-21 16:43:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:43:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:18,303 INFO L225 Difference]: With dead ends: 3820 [2021-08-21 16:43:18,303 INFO L226 Difference]: Without dead ends: 3740 [2021-08-21 16:43:18,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 676.2ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:43:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-08-21 16:43:18,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 1946. [2021-08-21 16:43:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1935 states have (on average 1.282687338501292) internal successors, (2482), 1945 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2482 transitions. [2021-08-21 16:43:18,320 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2482 transitions. Word has length 72 [2021-08-21 16:43:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:18,320 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2482 transitions. [2021-08-21 16:43:18,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:18,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2482 transitions. [2021-08-21 16:43:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:18,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:18,322 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:18,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 16:43:18,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:18,524 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:18,524 INFO L82 PathProgramCache]: Analyzing trace with hash 621165014, now seen corresponding path program 69 times [2021-08-21 16:43:18,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:18,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424391279] [2021-08-21 16:43:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:18,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:18,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:18,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424391279] [2021-08-21 16:43:18,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424391279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:18,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933439352] [2021-08-21 16:43:18,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:43:18,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:18,690 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:18,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 16:43:23,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:43:23,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:43:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:43:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:24,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933439352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:24,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:43:24,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:43:24,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573187238] [2021-08-21 16:43:24,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:43:24,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:43:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:43:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:43:24,151 INFO L87 Difference]: Start difference. First operand 1946 states and 2482 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:24,664 INFO L93 Difference]: Finished difference Result 3711 states and 4633 transitions. [2021-08-21 16:43:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 16:43:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:24,667 INFO L225 Difference]: With dead ends: 3711 [2021-08-21 16:43:24,667 INFO L226 Difference]: Without dead ends: 3631 [2021-08-21 16:43:24,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=470, Invalid=1422, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 16:43:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-08-21 16:43:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 1931. [2021-08-21 16:43:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1920 states have (on average 1.2817708333333333) internal successors, (2461), 1930 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 2461 transitions. [2021-08-21 16:43:24,686 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 2461 transitions. Word has length 72 [2021-08-21 16:43:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:24,686 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 2461 transitions. [2021-08-21 16:43:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 2461 transitions. [2021-08-21 16:43:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:24,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:24,689 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:24,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 16:43:24,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 16:43:24,908 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1148321490, now seen corresponding path program 70 times [2021-08-21 16:43:24,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:24,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132264255] [2021-08-21 16:43:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:24,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:25,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:25,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132264255] [2021-08-21 16:43:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132264255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33051435] [2021-08-21 16:43:25,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:43:25,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:25,073 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:25,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 16:43:29,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:43:29,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:43:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:43:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:32,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33051435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:32,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:43:32,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:43:32,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058149669] [2021-08-21 16:43:32,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:43:32,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:43:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:43:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=447, Unknown=1, NotChecked=0, Total=600 [2021-08-21 16:43:32,868 INFO L87 Difference]: Start difference. First operand 1931 states and 2461 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:45,885 INFO L93 Difference]: Finished difference Result 3939 states and 4917 transitions. [2021-08-21 16:43:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:43:45,885 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:45,889 INFO L225 Difference]: With dead ends: 3939 [2021-08-21 16:43:45,889 INFO L226 Difference]: Without dead ends: 3859 [2021-08-21 16:43:45,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 10991.2ms TimeCoverageRelationStatistics Valid=519, Invalid=1550, Unknown=1, NotChecked=0, Total=2070 [2021-08-21 16:43:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2021-08-21 16:43:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 1981. [2021-08-21 16:43:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1970 states have (on average 1.2807106598984772) internal successors, (2523), 1980 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2523 transitions. [2021-08-21 16:43:45,909 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2523 transitions. Word has length 72 [2021-08-21 16:43:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:45,909 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 2523 transitions. [2021-08-21 16:43:45,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2523 transitions. [2021-08-21 16:43:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:45,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:45,911 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:45,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 16:43:46,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 16:43:46,112 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:46,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:46,113 INFO L82 PathProgramCache]: Analyzing trace with hash 807913284, now seen corresponding path program 71 times [2021-08-21 16:43:46,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:46,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722680501] [2021-08-21 16:43:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:46,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:46,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:46,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722680501] [2021-08-21 16:43:46,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722680501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:46,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649331103] [2021-08-21 16:43:46,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:43:46,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:46,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:46,291 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:46,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 16:43:51,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 16:43:51,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:43:51,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:51,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:43:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:51,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649331103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:51,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:43:51,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:43:51,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128173769] [2021-08-21 16:43:51,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:43:51,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:43:51,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:43:51,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:43:51,931 INFO L87 Difference]: Start difference. First operand 1981 states and 2523 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:43:52,614 INFO L93 Difference]: Finished difference Result 3780 states and 4724 transitions. [2021-08-21 16:43:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 16:43:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:43:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:43:52,619 INFO L225 Difference]: With dead ends: 3780 [2021-08-21 16:43:52,619 INFO L226 Difference]: Without dead ends: 3700 [2021-08-21 16:43:52,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1601, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:43:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3700 states. [2021-08-21 16:43:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3700 to 1941. [2021-08-21 16:43:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1930 states have (on average 1.2803108808290156) internal successors, (2471), 1940 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2471 transitions. [2021-08-21 16:43:52,637 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2471 transitions. Word has length 72 [2021-08-21 16:43:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:43:52,637 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2471 transitions. [2021-08-21 16:43:52,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:43:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2471 transitions. [2021-08-21 16:43:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:43:52,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:43:52,639 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:43:52,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 16:43:52,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 16:43:52,840 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:43:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:43:52,840 INFO L82 PathProgramCache]: Analyzing trace with hash 868611926, now seen corresponding path program 72 times [2021-08-21 16:43:52,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:43:52,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931685847] [2021-08-21 16:43:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:43:52,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:43:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:43:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:43:53,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:43:53,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931685847] [2021-08-21 16:43:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931685847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:43:53,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052641788] [2021-08-21 16:43:53,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:43:53,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:43:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:43:53,064 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:43:53,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 16:43:57,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:43:57,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:43:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:43:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:44:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052641788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:03,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:44:03,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:44:03,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833794759] [2021-08-21 16:44:03,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:44:03,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:44:03,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:44:03,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=453, Unknown=2, NotChecked=0, Total=600 [2021-08-21 16:44:03,337 INFO L87 Difference]: Start difference. First operand 1941 states and 2471 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:44:17,255 INFO L93 Difference]: Finished difference Result 4078 states and 5082 transitions. [2021-08-21 16:44:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 16:44:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:44:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:44:17,259 INFO L225 Difference]: With dead ends: 4078 [2021-08-21 16:44:17,259 INFO L226 Difference]: Without dead ends: 3958 [2021-08-21 16:44:17,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 10360.6ms TimeCoverageRelationStatistics Valid=662, Invalid=1987, Unknown=3, NotChecked=0, Total=2652 [2021-08-21 16:44:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-08-21 16:44:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 1991. [2021-08-21 16:44:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1980 states have (on average 1.2792929292929294) internal successors, (2533), 1990 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 2533 transitions. [2021-08-21 16:44:17,281 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 2533 transitions. Word has length 72 [2021-08-21 16:44:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:44:17,281 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 2533 transitions. [2021-08-21 16:44:17,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 2533 transitions. [2021-08-21 16:44:17,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:44:17,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:44:17,283 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:44:17,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 16:44:17,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 16:44:17,484 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:44:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:44:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash 189968596, now seen corresponding path program 73 times [2021-08-21 16:44:17,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:44:17,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958280675] [2021-08-21 16:44:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:44:17,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:44:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:17,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:44:17,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958280675] [2021-08-21 16:44:17,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958280675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:17,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227967567] [2021-08-21 16:44:17,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:44:17,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:17,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:44:17,654 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:44:17,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 16:44:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:44:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:44:23,480 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:23,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227967567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:23,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:44:23,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:44:23,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036288498] [2021-08-21 16:44:23,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:44:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:44:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:44:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:44:23,481 INFO L87 Difference]: Start difference. First operand 1991 states and 2533 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:24,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:44:24,450 INFO L93 Difference]: Finished difference Result 3980 states and 4956 transitions. [2021-08-21 16:44:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:44:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:44:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:44:24,454 INFO L225 Difference]: With dead ends: 3980 [2021-08-21 16:44:24,454 INFO L226 Difference]: Without dead ends: 3900 [2021-08-21 16:44:24,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=658, Invalid=1892, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 16:44:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2021-08-21 16:44:24,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2041. [2021-08-21 16:44:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2030 states have (on average 1.2783251231527093) internal successors, (2595), 2040 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 2595 transitions. [2021-08-21 16:44:24,472 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 2595 transitions. Word has length 72 [2021-08-21 16:44:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:44:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 2041 states and 2595 transitions. [2021-08-21 16:44:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 2595 transitions. [2021-08-21 16:44:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:44:24,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:44:24,474 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:44:24,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 16:44:24,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 16:44:24,675 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:44:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:44:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash 528203720, now seen corresponding path program 74 times [2021-08-21 16:44:24,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:44:24,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309322810] [2021-08-21 16:44:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:44:24,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:44:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:24,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:44:24,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309322810] [2021-08-21 16:44:24,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309322810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:24,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847289927] [2021-08-21 16:44:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:44:24,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:24,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:44:24,839 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:44:24,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 16:44:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:44:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:44:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:44:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:44:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:30,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847289927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:30,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:44:30,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:44:30,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657911837] [2021-08-21 16:44:30,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:44:30,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:44:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:44:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:44:30,773 INFO L87 Difference]: Start difference. First operand 2041 states and 2595 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:44:31,601 INFO L93 Difference]: Finished difference Result 3770 states and 4718 transitions. [2021-08-21 16:44:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 16:44:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:44:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:44:31,605 INFO L225 Difference]: With dead ends: 3770 [2021-08-21 16:44:31,605 INFO L226 Difference]: Without dead ends: 3690 [2021-08-21 16:44:31,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 893.9ms TimeCoverageRelationStatistics Valid=635, Invalid=1815, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:44:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2021-08-21 16:44:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 2016. [2021-08-21 16:44:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2005 states have (on average 1.283291770573566) internal successors, (2573), 2015 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 2573 transitions. [2021-08-21 16:44:31,622 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 2573 transitions. Word has length 72 [2021-08-21 16:44:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:44:31,622 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 2573 transitions. [2021-08-21 16:44:31,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 2573 transitions. [2021-08-21 16:44:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:44:31,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:44:31,624 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:44:31,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 16:44:31,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:31,825 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:44:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:44:31,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1392453024, now seen corresponding path program 75 times [2021-08-21 16:44:31,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:44:31,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119568207] [2021-08-21 16:44:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:44:31,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:44:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:32,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:44:32,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119568207] [2021-08-21 16:44:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119568207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:32,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117645869] [2021-08-21 16:44:32,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:44:32,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:32,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:44:32,052 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:44:32,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 16:44:37,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:44:37,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:44:37,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:44:37,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:44:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:37,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117645869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:37,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:44:37,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:44:37,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062527524] [2021-08-21 16:44:37,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:44:37,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:44:37,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:44:37,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:44:37,952 INFO L87 Difference]: Start difference. First operand 2016 states and 2573 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:38,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:44:38,782 INFO L93 Difference]: Finished difference Result 3740 states and 4684 transitions. [2021-08-21 16:44:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 16:44:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:44:38,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:44:38,786 INFO L225 Difference]: With dead ends: 3740 [2021-08-21 16:44:38,786 INFO L226 Difference]: Without dead ends: 3660 [2021-08-21 16:44:38,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 907.9ms TimeCoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:44:38,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-08-21 16:44:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 1991. [2021-08-21 16:44:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1980 states have (on average 1.2838383838383838) internal successors, (2542), 1990 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 2542 transitions. [2021-08-21 16:44:38,804 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 2542 transitions. Word has length 72 [2021-08-21 16:44:38,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:44:38,804 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 2542 transitions. [2021-08-21 16:44:38,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:38,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 2542 transitions. [2021-08-21 16:44:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:44:38,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:44:38,806 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:44:38,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 16:44:39,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:39,007 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:44:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:44:39,007 INFO L82 PathProgramCache]: Analyzing trace with hash 880959394, now seen corresponding path program 76 times [2021-08-21 16:44:39,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:44:39,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144516661] [2021-08-21 16:44:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:44:39,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:44:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:39,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:44:39,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144516661] [2021-08-21 16:44:39,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144516661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:39,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245777649] [2021-08-21 16:44:39,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:44:39,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:39,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:44:39,185 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:44:39,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 16:44:44,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:44:44,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:44:44,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:44:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:44:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:45,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245777649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:45,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:44:45,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:44:45,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123878394] [2021-08-21 16:44:45,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:44:45,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:44:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:44:45,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:44:45,145 INFO L87 Difference]: Start difference. First operand 1991 states and 2542 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:44:45,913 INFO L93 Difference]: Finished difference Result 3691 states and 4621 transitions. [2021-08-21 16:44:45,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 16:44:45,913 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:44:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:44:45,917 INFO L225 Difference]: With dead ends: 3691 [2021-08-21 16:44:45,917 INFO L226 Difference]: Without dead ends: 3611 [2021-08-21 16:44:45,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 839.1ms TimeCoverageRelationStatistics Valid=660, Invalid=1890, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 16:44:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-08-21 16:44:45,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2006. [2021-08-21 16:44:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1995 states have (on average 1.2862155388471177) internal successors, (2566), 2005 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 2566 transitions. [2021-08-21 16:44:45,935 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 2566 transitions. Word has length 72 [2021-08-21 16:44:45,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:44:45,936 INFO L470 AbstractCegarLoop]: Abstraction has 2006 states and 2566 transitions. [2021-08-21 16:44:45,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:45,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 2566 transitions. [2021-08-21 16:44:45,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:44:45,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:44:45,938 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:44:45,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 16:44:46,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 16:44:46,138 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:44:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:44:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1767201930, now seen corresponding path program 77 times [2021-08-21 16:44:46,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:44:46,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393388756] [2021-08-21 16:44:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:44:46,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:44:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:46,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:44:46,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393388756] [2021-08-21 16:44:46,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393388756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:46,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482266582] [2021-08-21 16:44:46,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:44:46,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:46,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:44:46,308 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:44:46,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 16:44:51,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 16:44:51,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:44:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:44:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:44:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:52,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482266582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:52,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:44:52,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:44:52,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524332477] [2021-08-21 16:44:52,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:44:52,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:44:52,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:44:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:44:52,439 INFO L87 Difference]: Start difference. First operand 2006 states and 2566 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:55,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:44:55,023 INFO L93 Difference]: Finished difference Result 3526 states and 4426 transitions. [2021-08-21 16:44:55,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:44:55,024 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:44:55,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:44:55,027 INFO L225 Difference]: With dead ends: 3526 [2021-08-21 16:44:55,027 INFO L226 Difference]: Without dead ends: 3446 [2021-08-21 16:44:55,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 900.6ms TimeCoverageRelationStatistics Valid=564, Invalid=1598, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 16:44:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-08-21 16:44:55,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 1991. [2021-08-21 16:44:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1980 states have (on average 1.2792929292929294) internal successors, (2533), 1990 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 2533 transitions. [2021-08-21 16:44:55,044 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 2533 transitions. Word has length 72 [2021-08-21 16:44:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:44:55,044 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 2533 transitions. [2021-08-21 16:44:55,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:44:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 2533 transitions. [2021-08-21 16:44:55,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:44:55,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:44:55,046 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:44:55,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 16:44:55,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 16:44:55,246 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:44:55,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:44:55,247 INFO L82 PathProgramCache]: Analyzing trace with hash -210980526, now seen corresponding path program 78 times [2021-08-21 16:44:55,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:44:55,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052113529] [2021-08-21 16:44:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:44:55,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:44:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:44:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:44:55,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:44:55,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052113529] [2021-08-21 16:44:55,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052113529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:44:55,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459486820] [2021-08-21 16:44:55,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:44:55,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:44:55,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:44:55,448 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:44:55,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 16:45:00,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 16:45:00,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:45:00,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:01,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459486820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:01,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:01,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:01,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68661261] [2021-08-21 16:45:01,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:01,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:01,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:01,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:01,561 INFO L87 Difference]: Start difference. First operand 1991 states and 2533 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:02,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:02,430 INFO L93 Difference]: Finished difference Result 4216 states and 5239 transitions. [2021-08-21 16:45:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:45:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:02,434 INFO L225 Difference]: With dead ends: 4216 [2021-08-21 16:45:02,434 INFO L226 Difference]: Without dead ends: 4016 [2021-08-21 16:45:02,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 932.3ms TimeCoverageRelationStatistics Valid=751, Invalid=2329, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:45:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-08-21 16:45:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 2123. [2021-08-21 16:45:02,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2112 states have (on average 1.2736742424242424) internal successors, (2690), 2122 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 2690 transitions. [2021-08-21 16:45:02,454 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 2690 transitions. Word has length 72 [2021-08-21 16:45:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:02,454 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 2690 transitions. [2021-08-21 16:45:02,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 2690 transitions. [2021-08-21 16:45:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:02,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:02,456 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:02,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 16:45:02,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:02,656 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:02,657 INFO L82 PathProgramCache]: Analyzing trace with hash -889623856, now seen corresponding path program 79 times [2021-08-21 16:45:02,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:02,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506569413] [2021-08-21 16:45:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:02,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:02,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:02,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506569413] [2021-08-21 16:45:02,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506569413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:02,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397487175] [2021-08-21 16:45:02,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:45:02,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:02,821 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:02,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 16:45:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:08,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:09,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397487175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:09,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:09,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:09,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940321361] [2021-08-21 16:45:09,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:09,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:09,014 INFO L87 Difference]: Start difference. First operand 2123 states and 2690 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:09,793 INFO L93 Difference]: Finished difference Result 4261 states and 5272 transitions. [2021-08-21 16:45:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 16:45:09,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:09,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:09,797 INFO L225 Difference]: With dead ends: 4261 [2021-08-21 16:45:09,798 INFO L226 Difference]: Without dead ends: 4181 [2021-08-21 16:45:09,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=713, Invalid=1939, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:45:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-08-21 16:45:09,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 2138. [2021-08-21 16:45:09,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2127 states have (on average 1.2731546779501646) internal successors, (2708), 2137 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 2708 transitions. [2021-08-21 16:45:09,821 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 2708 transitions. Word has length 72 [2021-08-21 16:45:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:09,821 INFO L470 AbstractCegarLoop]: Abstraction has 2138 states and 2708 transitions. [2021-08-21 16:45:09,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 2708 transitions. [2021-08-21 16:45:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:09,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:09,823 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:09,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-21 16:45:10,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:10,024 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:10,024 INFO L82 PathProgramCache]: Analyzing trace with hash -551388732, now seen corresponding path program 80 times [2021-08-21 16:45:10,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:10,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925583051] [2021-08-21 16:45:10,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:10,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:10,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:10,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925583051] [2021-08-21 16:45:10,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925583051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:10,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015361387] [2021-08-21 16:45:10,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:45:10,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:10,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:10,188 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:10,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 16:45:15,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:45:15,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:45:15,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:15,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:16,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015361387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:16,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:16,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:16,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233700667] [2021-08-21 16:45:16,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:16,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:16,456 INFO L87 Difference]: Start difference. First operand 2138 states and 2708 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:17,253 INFO L93 Difference]: Finished difference Result 4051 states and 5034 transitions. [2021-08-21 16:45:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 16:45:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:17,258 INFO L225 Difference]: With dead ends: 4051 [2021-08-21 16:45:17,258 INFO L226 Difference]: Without dead ends: 3971 [2021-08-21 16:45:17,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=704, Invalid=1948, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:45:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-08-21 16:45:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2108. [2021-08-21 16:45:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2097 states have (on average 1.2784930853600383) internal successors, (2681), 2107 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 2681 transitions. [2021-08-21 16:45:17,276 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 2681 transitions. Word has length 72 [2021-08-21 16:45:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:17,276 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 2681 transitions. [2021-08-21 16:45:17,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 2681 transitions. [2021-08-21 16:45:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:17,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:17,278 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:17,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 16:45:17,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-21 16:45:17,479 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:17,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1822921820, now seen corresponding path program 81 times [2021-08-21 16:45:17,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:17,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142786724] [2021-08-21 16:45:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:17,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:17,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:17,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142786724] [2021-08-21 16:45:17,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142786724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:17,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325347714] [2021-08-21 16:45:17,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:45:17,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:17,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:17,642 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:17,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 16:45:23,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:45:23,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:45:23,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:23,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:23,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325347714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:23,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:23,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:23,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177514509] [2021-08-21 16:45:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:23,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:23,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:23,997 INFO L87 Difference]: Start difference. First operand 2108 states and 2681 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:24,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:24,906 INFO L93 Difference]: Finished difference Result 3954 states and 4915 transitions. [2021-08-21 16:45:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 16:45:24,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:24,910 INFO L225 Difference]: With dead ends: 3954 [2021-08-21 16:45:24,910 INFO L226 Difference]: Without dead ends: 3874 [2021-08-21 16:45:24,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=713, Invalid=1939, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 16:45:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2021-08-21 16:45:24,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 2088. [2021-08-21 16:45:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2077 states have (on average 1.2811747713047665) internal successors, (2661), 2087 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:24,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2661 transitions. [2021-08-21 16:45:24,945 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2661 transitions. Word has length 72 [2021-08-21 16:45:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:24,945 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 2661 transitions. [2021-08-21 16:45:24,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2661 transitions. [2021-08-21 16:45:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:24,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:24,947 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:24,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 16:45:25,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 16:45:25,148 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:25,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1383788562, now seen corresponding path program 82 times [2021-08-21 16:45:25,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:25,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640300028] [2021-08-21 16:45:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:25,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:25,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640300028] [2021-08-21 16:45:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640300028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:25,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425974112] [2021-08-21 16:45:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:45:25,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:25,313 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:25,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 16:45:31,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:45:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:45:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:31,732 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:31,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425974112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:31,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:31,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:31,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011597825] [2021-08-21 16:45:31,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:31,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:31,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:31,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:31,733 INFO L87 Difference]: Start difference. First operand 2088 states and 2661 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:32,718 INFO L93 Difference]: Finished difference Result 4511 states and 5582 transitions. [2021-08-21 16:45:32,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:45:32,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:32,723 INFO L225 Difference]: With dead ends: 4511 [2021-08-21 16:45:32,723 INFO L226 Difference]: Without dead ends: 4431 [2021-08-21 16:45:32,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1020.7ms TimeCoverageRelationStatistics Valid=904, Invalid=2518, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:45:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-08-21 16:45:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 2145. [2021-08-21 16:45:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2134 states have (on average 1.280693533270853) internal successors, (2733), 2144 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2733 transitions. [2021-08-21 16:45:32,743 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2733 transitions. Word has length 72 [2021-08-21 16:45:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:32,743 INFO L470 AbstractCegarLoop]: Abstraction has 2145 states and 2733 transitions. [2021-08-21 16:45:32,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2733 transitions. [2021-08-21 16:45:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:32,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:32,745 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:32,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 16:45:32,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 16:45:32,946 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:32,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:32,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1722023686, now seen corresponding path program 83 times [2021-08-21 16:45:32,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:32,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079032911] [2021-08-21 16:45:32,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:32,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:33,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:33,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079032911] [2021-08-21 16:45:33,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079032911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:33,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895503326] [2021-08-21 16:45:33,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:45:33,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:33,154 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:33,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 16:45:38,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:45:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:45:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:39,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895503326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:39,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:39,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:39,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370400401] [2021-08-21 16:45:39,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:39,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:39,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:39,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:39,577 INFO L87 Difference]: Start difference. First operand 2145 states and 2733 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:40,547 INFO L93 Difference]: Finished difference Result 4261 states and 5304 transitions. [2021-08-21 16:45:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 16:45:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:40,551 INFO L225 Difference]: With dead ends: 4261 [2021-08-21 16:45:40,551 INFO L226 Difference]: Without dead ends: 4181 [2021-08-21 16:45:40,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1006.5ms TimeCoverageRelationStatistics Valid=889, Invalid=2417, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 16:45:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-08-21 16:45:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 2168. [2021-08-21 16:45:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2157 states have (on average 1.2818729717199815) internal successors, (2765), 2167 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2765 transitions. [2021-08-21 16:45:40,602 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2765 transitions. Word has length 72 [2021-08-21 16:45:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:40,603 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 2765 transitions. [2021-08-21 16:45:40,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2765 transitions. [2021-08-21 16:45:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:40,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:40,604 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:40,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 16:45:40,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:40,815 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:40,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:40,816 INFO L82 PathProgramCache]: Analyzing trace with hash -198633058, now seen corresponding path program 84 times [2021-08-21 16:45:40,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:40,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820181236] [2021-08-21 16:45:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:40,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:40,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:40,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820181236] [2021-08-21 16:45:40,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820181236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:40,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959445902] [2021-08-21 16:45:40,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:45:40,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:40,997 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:40,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 16:45:46,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 16:45:46,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:45:46,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:46,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:47,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959445902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:47,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:47,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:47,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568860221] [2021-08-21 16:45:47,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:47,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:47,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:47,525 INFO L87 Difference]: Start difference. First operand 2168 states and 2765 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:48,404 INFO L93 Difference]: Finished difference Result 4307 states and 5338 transitions. [2021-08-21 16:45:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:45:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:48,416 INFO L225 Difference]: With dead ends: 4307 [2021-08-21 16:45:48,416 INFO L226 Difference]: Without dead ends: 4227 [2021-08-21 16:45:48,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 918.7ms TimeCoverageRelationStatistics Valid=813, Invalid=2267, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:45:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-08-21 16:45:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 2205. [2021-08-21 16:45:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2194 states have (on average 1.2798541476754786) internal successors, (2808), 2204 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 2808 transitions. [2021-08-21 16:45:48,437 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 2808 transitions. Word has length 72 [2021-08-21 16:45:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:48,437 INFO L470 AbstractCegarLoop]: Abstraction has 2205 states and 2808 transitions. [2021-08-21 16:45:48,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 2808 transitions. [2021-08-21 16:45:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:48,439 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:48,439 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:48,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 16:45:48,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 16:45:48,648 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2024936198, now seen corresponding path program 85 times [2021-08-21 16:45:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:48,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700826564] [2021-08-21 16:45:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:48,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:48,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:48,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700826564] [2021-08-21 16:45:48,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700826564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:48,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721834483] [2021-08-21 16:45:48,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:45:48,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:48,866 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:48,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 16:45:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:54,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:45:54,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:45:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:55,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721834483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:55,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:45:55,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:45:55,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870553028] [2021-08-21 16:45:55,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:45:55,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:45:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:45:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:45:55,516 INFO L87 Difference]: Start difference. First operand 2205 states and 2808 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:45:56,472 INFO L93 Difference]: Finished difference Result 4194 states and 5243 transitions. [2021-08-21 16:45:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 16:45:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:45:56,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:45:56,478 INFO L225 Difference]: With dead ends: 4194 [2021-08-21 16:45:56,478 INFO L226 Difference]: Without dead ends: 4114 [2021-08-21 16:45:56,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=807, Invalid=2163, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 16:45:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-08-21 16:45:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 2173. [2021-08-21 16:45:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2162 states have (on average 1.2784458834412582) internal successors, (2764), 2172 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 2764 transitions. [2021-08-21 16:45:56,506 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 2764 transitions. Word has length 72 [2021-08-21 16:45:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:45:56,506 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 2764 transitions. [2021-08-21 16:45:56,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:45:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 2764 transitions. [2021-08-21 16:45:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:45:56,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:45:56,508 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:45:56,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 16:45:56,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 16:45:56,709 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:45:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:45:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1195088880, now seen corresponding path program 86 times [2021-08-21 16:45:56,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:45:56,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821685902] [2021-08-21 16:45:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:45:56,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:45:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:45:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:45:56,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:45:56,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821685902] [2021-08-21 16:45:56,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821685902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:45:56,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051732616] [2021-08-21 16:45:56,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:45:56,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:45:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:45:56,871 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:45:56,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 16:46:02,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:46:02,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:02,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:02,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:03,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051732616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:03,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:03,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:03,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621062481] [2021-08-21 16:46:03,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:03,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:03,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:03,467 INFO L87 Difference]: Start difference. First operand 2173 states and 2764 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:04,308 INFO L93 Difference]: Finished difference Result 4330 states and 5371 transitions. [2021-08-21 16:46:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 16:46:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:04,313 INFO L225 Difference]: With dead ends: 4330 [2021-08-21 16:46:04,313 INFO L226 Difference]: Without dead ends: 4250 [2021-08-21 16:46:04,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=866, Invalid=2556, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:46:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2021-08-21 16:46:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 2280. [2021-08-21 16:46:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2269 states have (on average 1.2772146319964741) internal successors, (2898), 2279 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 2898 transitions. [2021-08-21 16:46:04,335 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 2898 transitions. Word has length 72 [2021-08-21 16:46:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:04,335 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 2898 transitions. [2021-08-21 16:46:04,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 2898 transitions. [2021-08-21 16:46:04,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:04,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:04,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:04,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-21 16:46:04,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-21 16:46:04,537 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:04,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:04,538 INFO L82 PathProgramCache]: Analyzing trace with hash -856853756, now seen corresponding path program 87 times [2021-08-21 16:46:04,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:04,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034519086] [2021-08-21 16:46:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:04,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:04,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:04,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034519086] [2021-08-21 16:46:04,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034519086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447724625] [2021-08-21 16:46:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:46:04,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:04,704 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:04,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 16:46:10,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 16:46:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:10,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:10,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:11,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447724625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:11,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:11,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:11,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346803069] [2021-08-21 16:46:11,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:11,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:11,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:11,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:11,384 INFO L87 Difference]: Start difference. First operand 2280 states and 2898 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:12,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:12,264 INFO L93 Difference]: Finished difference Result 4206 states and 5255 transitions. [2021-08-21 16:46:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 16:46:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:12,268 INFO L225 Difference]: With dead ends: 4206 [2021-08-21 16:46:12,269 INFO L226 Difference]: Without dead ends: 4126 [2021-08-21 16:46:12,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 913.5ms TimeCoverageRelationStatistics Valid=901, Invalid=2521, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 16:46:12,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-08-21 16:46:12,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2228. [2021-08-21 16:46:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2217 states have (on average 1.2796571944068562) internal successors, (2837), 2227 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2837 transitions. [2021-08-21 16:46:12,292 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2837 transitions. Word has length 72 [2021-08-21 16:46:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:12,292 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 2837 transitions. [2021-08-21 16:46:12,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2837 transitions. [2021-08-21 16:46:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:12,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:12,294 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:12,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 16:46:12,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-21 16:46:12,495 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1855691920, now seen corresponding path program 88 times [2021-08-21 16:46:12,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:12,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954145106] [2021-08-21 16:46:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:12,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:12,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:12,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954145106] [2021-08-21 16:46:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954145106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:12,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069029728] [2021-08-21 16:46:12,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:46:12,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:12,658 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:12,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 16:46:18,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:46:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:19,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069029728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:19,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:19,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:19,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305771358] [2021-08-21 16:46:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:19,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:19,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:19,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:19,398 INFO L87 Difference]: Start difference. First operand 2228 states and 2837 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:20,263 INFO L93 Difference]: Finished difference Result 4241 states and 5284 transitions. [2021-08-21 16:46:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 16:46:20,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:20,268 INFO L225 Difference]: With dead ends: 4241 [2021-08-21 16:46:20,268 INFO L226 Difference]: Without dead ends: 4161 [2021-08-21 16:46:20,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 906.3ms TimeCoverageRelationStatistics Valid=831, Invalid=2361, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 16:46:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-08-21 16:46:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 2208. [2021-08-21 16:46:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2197 states have (on average 1.2822030040964951) internal successors, (2817), 2207 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 2817 transitions. [2021-08-21 16:46:20,288 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 2817 transitions. Word has length 72 [2021-08-21 16:46:20,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:20,288 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 2817 transitions. [2021-08-21 16:46:20,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:20,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 2817 transitions. [2021-08-21 16:46:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:20,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:20,290 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:20,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 16:46:20,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:20,491 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -647081468, now seen corresponding path program 89 times [2021-08-21 16:46:20,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:20,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136815101] [2021-08-21 16:46:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:20,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:20,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:20,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136815101] [2021-08-21 16:46:20,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136815101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:20,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931248834] [2021-08-21 16:46:20,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:46:20,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:20,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:20,654 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:20,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 16:46:26,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 16:46:26,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931248834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:27,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:27,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:27,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304018713] [2021-08-21 16:46:27,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:27,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:27,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:27,403 INFO L87 Difference]: Start difference. First operand 2208 states and 2817 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:28,243 INFO L93 Difference]: Finished difference Result 4398 states and 5471 transitions. [2021-08-21 16:46:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 16:46:28,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:28,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:28,247 INFO L225 Difference]: With dead ends: 4398 [2021-08-21 16:46:28,247 INFO L226 Difference]: Without dead ends: 4318 [2021-08-21 16:46:28,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 852.5ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 16:46:28,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-08-21 16:46:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 2228. [2021-08-21 16:46:28,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2217 states have (on average 1.2837167343256652) internal successors, (2846), 2227 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2846 transitions. [2021-08-21 16:46:28,267 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2846 transitions. Word has length 72 [2021-08-21 16:46:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:28,267 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 2846 transitions. [2021-08-21 16:46:28,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2846 transitions. [2021-08-21 16:46:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:28,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:28,269 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:28,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 16:46:28,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:28,470 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash -308846344, now seen corresponding path program 90 times [2021-08-21 16:46:28,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:28,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526067413] [2021-08-21 16:46:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:28,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:28,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:28,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526067413] [2021-08-21 16:46:28,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526067413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:28,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675447285] [2021-08-21 16:46:28,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:46:28,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:28,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:28,635 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:28,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 16:46:34,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:46:34,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:34,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:35,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675447285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:35,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:35,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:35,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016438353] [2021-08-21 16:46:35,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:35,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:35,463 INFO L87 Difference]: Start difference. First operand 2228 states and 2846 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:36,152 INFO L93 Difference]: Finished difference Result 4093 states and 5112 transitions. [2021-08-21 16:46:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:46:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:36,156 INFO L225 Difference]: With dead ends: 4093 [2021-08-21 16:46:36,157 INFO L226 Difference]: Without dead ends: 4013 [2021-08-21 16:46:36,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 726.2ms TimeCoverageRelationStatistics Valid=752, Invalid=2110, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 16:46:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-08-21 16:46:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 2223. [2021-08-21 16:46:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2212 states have (on average 1.2816455696202531) internal successors, (2835), 2222 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2835 transitions. [2021-08-21 16:46:36,175 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2835 transitions. Word has length 72 [2021-08-21 16:46:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:36,175 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 2835 transitions. [2021-08-21 16:46:36,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2835 transitions. [2021-08-21 16:46:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:36,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:36,177 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:36,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 16:46:36,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:36,378 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2065464208, now seen corresponding path program 91 times [2021-08-21 16:46:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:36,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25164394] [2021-08-21 16:46:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:36,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:36,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:36,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25164394] [2021-08-21 16:46:36,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25164394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:36,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343022361] [2021-08-21 16:46:36,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:46:36,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:36,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:36,547 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:36,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 16:46:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:42,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:43,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343022361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:43,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:43,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:43,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995996697] [2021-08-21 16:46:43,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:43,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:43,447 INFO L87 Difference]: Start difference. First operand 2223 states and 2835 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:44,205 INFO L93 Difference]: Finished difference Result 4283 states and 5338 transitions. [2021-08-21 16:46:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:46:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:44,210 INFO L225 Difference]: With dead ends: 4283 [2021-08-21 16:46:44,210 INFO L226 Difference]: Without dead ends: 4203 [2021-08-21 16:46:44,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 804.6ms TimeCoverageRelationStatistics Valid=780, Invalid=2190, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 16:46:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-08-21 16:46:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 2213. [2021-08-21 16:46:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2202 states have (on average 1.2883742052679383) internal successors, (2837), 2212 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 2837 transitions. [2021-08-21 16:46:44,229 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 2837 transitions. Word has length 72 [2021-08-21 16:46:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:44,229 INFO L470 AbstractCegarLoop]: Abstraction has 2213 states and 2837 transitions. [2021-08-21 16:46:44,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 2837 transitions. [2021-08-21 16:46:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:44,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:44,231 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:44,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 16:46:44,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:44,433 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1160897136, now seen corresponding path program 92 times [2021-08-21 16:46:44,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:44,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620370866] [2021-08-21 16:46:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:44,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:44,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:44,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620370866] [2021-08-21 16:46:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620370866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:44,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724671083] [2021-08-21 16:46:44,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:46:44,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:44,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:44,643 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:44,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 16:46:50,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:46:50,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:50,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:50,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:46:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:51,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724671083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:51,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:46:51,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:46:51,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549101108] [2021-08-21 16:46:51,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:46:51,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:46:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:46:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:46:51,611 INFO L87 Difference]: Start difference. First operand 2213 states and 2837 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:52,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:46:52,530 INFO L93 Difference]: Finished difference Result 4301 states and 5376 transitions. [2021-08-21 16:46:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 16:46:52,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:46:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:46:52,534 INFO L225 Difference]: With dead ends: 4301 [2021-08-21 16:46:52,534 INFO L226 Difference]: Without dead ends: 4221 [2021-08-21 16:46:52,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 969.1ms TimeCoverageRelationStatistics Valid=816, Invalid=2264, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:46:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-08-21 16:46:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 2178. [2021-08-21 16:46:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2167 states have (on average 1.2847254268574066) internal successors, (2784), 2177 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 2784 transitions. [2021-08-21 16:46:52,553 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 2784 transitions. Word has length 72 [2021-08-21 16:46:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:46:52,553 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 2784 transitions. [2021-08-21 16:46:52,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:46:52,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 2784 transitions. [2021-08-21 16:46:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:46:52,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:46:52,555 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:46:52,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 16:46:52,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:52,756 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:46:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:46:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2099655952, now seen corresponding path program 93 times [2021-08-21 16:46:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:46:52,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579098151] [2021-08-21 16:46:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:46:52,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:46:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:46:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:46:52,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:46:52,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579098151] [2021-08-21 16:46:52,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579098151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:46:52,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437744531] [2021-08-21 16:46:52,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:46:52,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:46:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:46:52,981 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:46:52,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 16:46:59,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 16:46:59,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:46:59,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:46:59,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:00,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437744531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:00,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:00,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:00,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039372626] [2021-08-21 16:47:00,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:00,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:00,037 INFO L87 Difference]: Start difference. First operand 2178 states and 2784 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:00,629 INFO L93 Difference]: Finished difference Result 3855 states and 4814 transitions. [2021-08-21 16:47:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:47:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:00,633 INFO L225 Difference]: With dead ends: 3855 [2021-08-21 16:47:00,633 INFO L226 Difference]: Without dead ends: 3775 [2021-08-21 16:47:00,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 725.9ms TimeCoverageRelationStatistics Valid=582, Invalid=1674, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:47:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-08-21 16:47:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2173. [2021-08-21 16:47:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2162 states have (on average 1.2826086956521738) internal successors, (2773), 2172 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 2773 transitions. [2021-08-21 16:47:00,652 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 2773 transitions. Word has length 72 [2021-08-21 16:47:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:00,652 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 2773 transitions. [2021-08-21 16:47:00,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 2773 transitions. [2021-08-21 16:47:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:00,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:00,654 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:00,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 16:47:00,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 16:47:00,854 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash -550368286, now seen corresponding path program 94 times [2021-08-21 16:47:00,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:00,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236199392] [2021-08-21 16:47:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:00,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:01,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:01,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236199392] [2021-08-21 16:47:01,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236199392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:01,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399381383] [2021-08-21 16:47:01,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:47:01,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:01,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:01,086 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:01,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 16:47:07,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:47:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:47:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:08,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399381383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:08,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:08,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:08,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902855552] [2021-08-21 16:47:08,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:08,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:08,223 INFO L87 Difference]: Start difference. First operand 2173 states and 2773 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:08,971 INFO L93 Difference]: Finished difference Result 4179 states and 5210 transitions. [2021-08-21 16:47:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:47:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:08,975 INFO L225 Difference]: With dead ends: 4179 [2021-08-21 16:47:08,975 INFO L226 Difference]: Without dead ends: 4099 [2021-08-21 16:47:08,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=613, Invalid=1643, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:47:08,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-08-21 16:47:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 2173. [2021-08-21 16:47:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2162 states have (on average 1.2826086956521738) internal successors, (2773), 2172 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 2773 transitions. [2021-08-21 16:47:08,994 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 2773 transitions. Word has length 72 [2021-08-21 16:47:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 2773 transitions. [2021-08-21 16:47:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 2773 transitions. [2021-08-21 16:47:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:08,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:08,996 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:09,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 16:47:09,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 16:47:09,197 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:09,197 INFO L82 PathProgramCache]: Analyzing trace with hash 728009954, now seen corresponding path program 95 times [2021-08-21 16:47:09,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:09,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730446082] [2021-08-21 16:47:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:09,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:09,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:09,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730446082] [2021-08-21 16:47:09,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730446082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:09,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612612394] [2021-08-21 16:47:09,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:47:09,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:09,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:09,413 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:09,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 16:47:15,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:47:15,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:47:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:16,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612612394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:16,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:16,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:16,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137064442] [2021-08-21 16:47:16,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:16,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:16,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:16,591 INFO L87 Difference]: Start difference. First operand 2173 states and 2773 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:17,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:17,319 INFO L93 Difference]: Finished difference Result 4474 states and 5555 transitions. [2021-08-21 16:47:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 16:47:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:17,323 INFO L225 Difference]: With dead ends: 4474 [2021-08-21 16:47:17,323 INFO L226 Difference]: Without dead ends: 4394 [2021-08-21 16:47:17,324 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 16:47:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-08-21 16:47:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 2210. [2021-08-21 16:47:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2199 states have (on average 1.280582082764893) internal successors, (2816), 2209 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 2816 transitions. [2021-08-21 16:47:17,344 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 2816 transitions. Word has length 72 [2021-08-21 16:47:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 2210 states and 2816 transitions. [2021-08-21 16:47:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 2816 transitions. [2021-08-21 16:47:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:17,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:17,346 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:17,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 16:47:17,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 16:47:17,546 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1066245078, now seen corresponding path program 96 times [2021-08-21 16:47:17,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:17,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157719663] [2021-08-21 16:47:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:17,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:17,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:17,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157719663] [2021-08-21 16:47:17,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157719663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:17,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31655840] [2021-08-21 16:47:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:47:17,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:17,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:17,709 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:17,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 16:47:24,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 16:47:24,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:47:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:24,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:24,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31655840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:24,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:24,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:24,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464556277] [2021-08-21 16:47:24,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:24,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:24,980 INFO L87 Difference]: Start difference. First operand 2210 states and 2816 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:25,761 INFO L93 Difference]: Finished difference Result 4594 states and 5715 transitions. [2021-08-21 16:47:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 16:47:25,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:25,766 INFO L225 Difference]: With dead ends: 4594 [2021-08-21 16:47:25,766 INFO L226 Difference]: Without dead ends: 4514 [2021-08-21 16:47:25,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 810.9ms TimeCoverageRelationStatistics Valid=817, Invalid=2263, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 16:47:25,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-08-21 16:47:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2198. [2021-08-21 16:47:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2187 states have (on average 1.2821216278006402) internal successors, (2804), 2197 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 2804 transitions. [2021-08-21 16:47:25,786 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 2804 transitions. Word has length 72 [2021-08-21 16:47:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:25,787 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 2804 transitions. [2021-08-21 16:47:25,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 2804 transitions. [2021-08-21 16:47:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:25,789 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:25,789 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:25,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 16:47:25,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:25,993 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:25,994 INFO L82 PathProgramCache]: Analyzing trace with hash -854411666, now seen corresponding path program 97 times [2021-08-21 16:47:25,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:25,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651486945] [2021-08-21 16:47:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:25,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:26,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:26,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651486945] [2021-08-21 16:47:26,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651486945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:26,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173674486] [2021-08-21 16:47:26,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:47:26,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:26,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:26,157 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:26,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 16:47:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:33,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173674486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:33,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:33,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:33,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526734522] [2021-08-21 16:47:33,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:33,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:33,443 INFO L87 Difference]: Start difference. First operand 2198 states and 2804 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:34,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:34,088 INFO L93 Difference]: Finished difference Result 4459 states and 5554 transitions. [2021-08-21 16:47:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 16:47:34,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:34,093 INFO L225 Difference]: With dead ends: 4459 [2021-08-21 16:47:34,093 INFO L226 Difference]: Without dead ends: 4379 [2021-08-21 16:47:34,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 686.2ms TimeCoverageRelationStatistics Valid=670, Invalid=1880, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 16:47:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-08-21 16:47:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 2193. [2021-08-21 16:47:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2182 states have (on average 1.2800183318056828) internal successors, (2793), 2192 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 2793 transitions. [2021-08-21 16:47:34,135 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 2793 transitions. Word has length 72 [2021-08-21 16:47:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:34,135 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 2793 transitions. [2021-08-21 16:47:34,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 2793 transitions. [2021-08-21 16:47:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:34,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:34,137 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:34,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 16:47:34,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:34,339 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash 31830870, now seen corresponding path program 98 times [2021-08-21 16:47:34,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:34,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267103989] [2021-08-21 16:47:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:34,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:34,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:34,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267103989] [2021-08-21 16:47:34,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267103989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:34,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572473780] [2021-08-21 16:47:34,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:47:34,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:34,504 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:34,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 16:47:41,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 16:47:41,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:47:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572473780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:41,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:41,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:41,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531561965] [2021-08-21 16:47:41,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:41,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:41,911 INFO L87 Difference]: Start difference. First operand 2193 states and 2793 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:42,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:42,517 INFO L93 Difference]: Finished difference Result 4335 states and 5398 transitions. [2021-08-21 16:47:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:47:42,517 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:42,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:42,522 INFO L225 Difference]: With dead ends: 4335 [2021-08-21 16:47:42,522 INFO L226 Difference]: Without dead ends: 4255 [2021-08-21 16:47:42,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=622, Invalid=1828, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 16:47:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-08-21 16:47:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 2173. [2021-08-21 16:47:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2162 states have (on average 1.2826086956521738) internal successors, (2773), 2172 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 2773 transitions. [2021-08-21 16:47:42,542 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 2773 transitions. Word has length 72 [2021-08-21 16:47:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:42,542 INFO L470 AbstractCegarLoop]: Abstraction has 2173 states and 2773 transitions. [2021-08-21 16:47:42,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 2773 transitions. [2021-08-21 16:47:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:42,544 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:42,544 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:42,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 16:47:42,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:42,745 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:42,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1542317866, now seen corresponding path program 99 times [2021-08-21 16:47:42,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:42,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269103619] [2021-08-21 16:47:42,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:42,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:42,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:42,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269103619] [2021-08-21 16:47:42,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269103619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:42,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926606666] [2021-08-21 16:47:42,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 16:47:42,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:42,907 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:42,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 16:47:49,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 16:47:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:47:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:50,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926606666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:50,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:50,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:50,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481163783] [2021-08-21 16:47:50,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:50,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:50,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:50,472 INFO L87 Difference]: Start difference. First operand 2173 states and 2773 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:51,191 INFO L93 Difference]: Finished difference Result 4213 states and 5256 transitions. [2021-08-21 16:47:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 16:47:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:51,195 INFO L225 Difference]: With dead ends: 4213 [2021-08-21 16:47:51,195 INFO L226 Difference]: Without dead ends: 4133 [2021-08-21 16:47:51,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 799.0ms TimeCoverageRelationStatistics Valid=581, Invalid=1675, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:47:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-08-21 16:47:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 2123. [2021-08-21 16:47:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2112 states have (on average 1.2836174242424243) internal successors, (2711), 2122 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 2711 transitions. [2021-08-21 16:47:51,215 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 2711 transitions. Word has length 72 [2021-08-21 16:47:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:51,215 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 2711 transitions. [2021-08-21 16:47:51,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 2711 transitions. [2021-08-21 16:47:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:51,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:51,217 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:51,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 16:47:51,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-21 16:47:51,421 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:47:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:47:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1508126122, now seen corresponding path program 100 times [2021-08-21 16:47:51,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:47:51,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037070745] [2021-08-21 16:47:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:47:51,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:47:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:47:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:51,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:47:51,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037070745] [2021-08-21 16:47:51,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037070745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:51,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590021439] [2021-08-21 16:47:51,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:47:51,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:47:51,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:47:51,601 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:47:51,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 16:47:58,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:47:58,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:47:58,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:47:58,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:47:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:47:59,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590021439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:47:59,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:47:59,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:47:59,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339574848] [2021-08-21 16:47:59,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:47:59,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:47:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:47:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:47:59,208 INFO L87 Difference]: Start difference. First operand 2123 states and 2711 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:47:59,771 INFO L93 Difference]: Finished difference Result 4203 states and 5218 transitions. [2021-08-21 16:47:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:47:59,772 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:47:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:47:59,775 INFO L225 Difference]: With dead ends: 4203 [2021-08-21 16:47:59,776 INFO L226 Difference]: Without dead ends: 4123 [2021-08-21 16:47:59,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 640.6ms TimeCoverageRelationStatistics Valid=505, Invalid=1475, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:47:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-08-21 16:47:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 2098. [2021-08-21 16:47:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2087 states have (on average 1.2841399137517968) internal successors, (2680), 2097 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2680 transitions. [2021-08-21 16:47:59,794 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2680 transitions. Word has length 72 [2021-08-21 16:47:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:47:59,794 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 2680 transitions. [2021-08-21 16:47:59,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:47:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2680 transitions. [2021-08-21 16:47:59,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:47:59,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:47:59,796 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:47:59,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 16:48:00,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:00,001 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash 284067786, now seen corresponding path program 101 times [2021-08-21 16:48:00,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:00,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507747680] [2021-08-21 16:48:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:00,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:00,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:00,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507747680] [2021-08-21 16:48:00,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507747680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:00,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980032646] [2021-08-21 16:48:00,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:48:00,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:00,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:00,164 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:00,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 16:48:07,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 16:48:07,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:48:07,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:48:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:48:07,758 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:07,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980032646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:07,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:48:07,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:48:07,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749703177] [2021-08-21 16:48:07,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:48:07,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:48:07,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:48:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:48:07,759 INFO L87 Difference]: Start difference. First operand 2098 states and 2680 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:48:08,357 INFO L93 Difference]: Finished difference Result 3989 states and 4968 transitions. [2021-08-21 16:48:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 16:48:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:48:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:48:08,361 INFO L225 Difference]: With dead ends: 3989 [2021-08-21 16:48:08,361 INFO L226 Difference]: Without dead ends: 3909 [2021-08-21 16:48:08,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 16:48:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-08-21 16:48:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 2103. [2021-08-21 16:48:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2092 states have (on average 1.2863288718929253) internal successors, (2691), 2102 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 2691 transitions. [2021-08-21 16:48:08,380 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 2691 transitions. Word has length 72 [2021-08-21 16:48:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:48:08,380 INFO L470 AbstractCegarLoop]: Abstraction has 2103 states and 2691 transitions. [2021-08-21 16:48:08,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 2691 transitions. [2021-08-21 16:48:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:48:08,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:48:08,382 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:48:08,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-21 16:48:08,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:08,582 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash 622302910, now seen corresponding path program 102 times [2021-08-21 16:48:08,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:08,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226893629] [2021-08-21 16:48:08,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:08,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:08,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:08,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226893629] [2021-08-21 16:48:08,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226893629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:08,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530255204] [2021-08-21 16:48:08,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:48:08,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:08,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:08,752 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:08,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 16:48:15,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 16:48:15,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:48:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:48:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:48:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:16,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530255204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:16,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:48:16,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:48:16,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370975665] [2021-08-21 16:48:16,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:48:16,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:48:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:48:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:48:16,326 INFO L87 Difference]: Start difference. First operand 2103 states and 2691 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:48:16,886 INFO L93 Difference]: Finished difference Result 4024 states and 5005 transitions. [2021-08-21 16:48:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 16:48:16,886 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:48:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:48:16,890 INFO L225 Difference]: With dead ends: 4024 [2021-08-21 16:48:16,890 INFO L226 Difference]: Without dead ends: 3944 [2021-08-21 16:48:16,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 611.0ms TimeCoverageRelationStatistics Valid=484, Invalid=1496, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 16:48:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2021-08-21 16:48:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 2083. [2021-08-21 16:48:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2072 states have (on average 1.2775096525096525) internal successors, (2647), 2082 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 2647 transitions. [2021-08-21 16:48:16,908 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 2647 transitions. Word has length 72 [2021-08-21 16:48:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:48:16,908 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 2647 transitions. [2021-08-21 16:48:16,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 2647 transitions. [2021-08-21 16:48:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:48:16,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:48:16,910 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:48:16,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 16:48:17,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:17,110 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:17,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:17,111 INFO L82 PathProgramCache]: Analyzing trace with hash -139365381, now seen corresponding path program 4 times [2021-08-21 16:48:17,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:17,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229285949] [2021-08-21 16:48:17,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:17,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:17,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:17,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229285949] [2021-08-21 16:48:17,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229285949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:17,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100837315] [2021-08-21 16:48:17,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 16:48:17,314 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:17,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:17,316 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:17,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 16:48:24,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 16:48:24,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:48:24,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:48:24,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:48:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:24,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100837315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:24,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:48:24,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:48:24,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89007980] [2021-08-21 16:48:24,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:48:24,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:48:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:48:24,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:48:24,818 INFO L87 Difference]: Start difference. First operand 2083 states and 2647 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:48:25,106 INFO L93 Difference]: Finished difference Result 3074 states and 3830 transitions. [2021-08-21 16:48:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 16:48:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:48:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:48:25,109 INFO L225 Difference]: With dead ends: 3074 [2021-08-21 16:48:25,109 INFO L226 Difference]: Without dead ends: 2914 [2021-08-21 16:48:25,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1126, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 16:48:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2021-08-21 16:48:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2093. [2021-08-21 16:48:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 2082 states have (on average 1.281940441882805) internal successors, (2669), 2092 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2669 transitions. [2021-08-21 16:48:25,125 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2669 transitions. Word has length 72 [2021-08-21 16:48:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:48:25,125 INFO L470 AbstractCegarLoop]: Abstraction has 2093 states and 2669 transitions. [2021-08-21 16:48:25,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2669 transitions. [2021-08-21 16:48:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:48:25,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:48:25,127 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:48:25,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 16:48:25,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 16:48:25,328 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:25,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:25,328 INFO L82 PathProgramCache]: Analyzing trace with hash -319119368, now seen corresponding path program 17 times [2021-08-21 16:48:25,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:25,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410920997] [2021-08-21 16:48:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:25,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:25,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:25,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410920997] [2021-08-21 16:48:25,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410920997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:25,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467425328] [2021-08-21 16:48:25,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 16:48:25,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:25,547 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:25,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 16:48:32,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 16:48:32,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:48:32,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:48:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:48:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:33,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467425328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:33,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:48:33,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:48:33,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525304861] [2021-08-21 16:48:33,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:48:33,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:48:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:48:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:48:33,108 INFO L87 Difference]: Start difference. First operand 2093 states and 2669 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:48:33,352 INFO L93 Difference]: Finished difference Result 3407 states and 4242 transitions. [2021-08-21 16:48:33,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 16:48:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:48:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:48:33,356 INFO L225 Difference]: With dead ends: 3407 [2021-08-21 16:48:33,356 INFO L226 Difference]: Without dead ends: 3327 [2021-08-21 16:48:33,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 16:48:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-08-21 16:48:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2108. [2021-08-21 16:48:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2097 states have (on average 1.2885073915116834) internal successors, (2702), 2107 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 2702 transitions. [2021-08-21 16:48:33,373 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 2702 transitions. Word has length 72 [2021-08-21 16:48:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:48:33,373 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 2702 transitions. [2021-08-21 16:48:33,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 2702 transitions. [2021-08-21 16:48:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:48:33,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:48:33,375 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:48:33,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-21 16:48:33,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 16:48:33,576 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1611121954, now seen corresponding path program 18 times [2021-08-21 16:48:33,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:33,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598481795] [2021-08-21 16:48:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:33,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:33,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:33,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598481795] [2021-08-21 16:48:33,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598481795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:33,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522579797] [2021-08-21 16:48:33,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 16:48:33,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:33,735 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 16:48:40,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 16:48:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 16:48:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:48:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:48:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:41,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522579797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:41,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:48:41,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:48:41,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436209765] [2021-08-21 16:48:41,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:48:41,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:48:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:48:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:48:41,381 INFO L87 Difference]: Start difference. First operand 2108 states and 2702 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:48:42,042 INFO L93 Difference]: Finished difference Result 4545 states and 5700 transitions. [2021-08-21 16:48:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 16:48:42,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:48:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:48:42,046 INFO L225 Difference]: With dead ends: 4545 [2021-08-21 16:48:42,046 INFO L226 Difference]: Without dead ends: 4305 [2021-08-21 16:48:42,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 744.5ms TimeCoverageRelationStatistics Valid=568, Invalid=2188, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 16:48:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-08-21 16:48:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 2084. [2021-08-21 16:48:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2073 states have (on average 1.2879884225759768) internal successors, (2670), 2083 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2670 transitions. [2021-08-21 16:48:42,071 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2670 transitions. Word has length 72 [2021-08-21 16:48:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:48:42,071 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 2670 transitions. [2021-08-21 16:48:42,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2670 transitions. [2021-08-21 16:48:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:48:42,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:48:42,072 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:48:42,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 16:48:42,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 16:48:42,277 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1361394284, now seen corresponding path program 103 times [2021-08-21 16:48:42,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:42,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272353790] [2021-08-21 16:48:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:42,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:42,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:42,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272353790] [2021-08-21 16:48:42,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272353790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:42,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717793026] [2021-08-21 16:48:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 16:48:42,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:42,435 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:42,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 16:48:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:49,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 16:48:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 16:48:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:50,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717793026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:50,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 16:48:50,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 16:48:50,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166780553] [2021-08-21 16:48:50,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 16:48:50,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 16:48:50,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 16:48:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-08-21 16:48:50,156 INFO L87 Difference]: Start difference. First operand 2084 states and 2670 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 16:48:51,319 INFO L93 Difference]: Finished difference Result 5338 states and 6687 transitions. [2021-08-21 16:48:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 16:48:51,319 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-21 16:48:51,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 16:48:51,324 INFO L225 Difference]: With dead ends: 5338 [2021-08-21 16:48:51,324 INFO L226 Difference]: Without dead ends: 5098 [2021-08-21 16:48:51,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 1172.2ms TimeCoverageRelationStatistics Valid=955, Invalid=3737, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 16:48:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2021-08-21 16:48:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 2099. [2021-08-21 16:48:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2088 states have (on average 1.2887931034482758) internal successors, (2691), 2098 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2691 transitions. [2021-08-21 16:48:51,347 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2691 transitions. Word has length 72 [2021-08-21 16:48:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 16:48:51,347 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 2691 transitions. [2021-08-21 16:48:51,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 25 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 16:48:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2691 transitions. [2021-08-21 16:48:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-21 16:48:51,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 16:48:51,348 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 16:48:51,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 16:48:51,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-21 16:48:51,549 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 16:48:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 16:48:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1368221646, now seen corresponding path program 104 times [2021-08-21 16:48:51,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 16:48:51,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515280391] [2021-08-21 16:48:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 16:48:51,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 16:48:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 16:48:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 16:48:51,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 16:48:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515280391] [2021-08-21 16:48:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515280391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 16:48:51,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759711090] [2021-08-21 16:48:51,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 16:48:51,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 16:48:51,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 16:48:51,709 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 16:48:51,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 16:48:55,601 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 16:48:55,601 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 16:48:56,630 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-21 16:48:56,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2021-08-21 16:48:56,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 16:48:56,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-21 16:48:56,832 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 73 with TraceHistMax 5,while executing Executor. [2021-08-21 16:48:56,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 16:48:56,833 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 16:48:56,836 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 16:48:56,836 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 16:48:56,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:48:56 BasicIcfg [2021-08-21 16:48:56,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 16:48:56,838 INFO L168 Benchmark]: Toolchain (without parser) took 696615.59 ms. Allocated memory was 190.8 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 154.4 MB in the beginning and 1.1 GB in the end (delta: -971.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-21 16:48:56,839 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 190.8 MB. Free memory was 172.5 MB in the beginning and 172.4 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 16:48:56,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 506.61 ms. Allocated memory is still 190.8 MB. Free memory was 154.1 MB in the beginning and 163.6 MB in the end (delta: -9.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-21 16:48:56,839 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.14 ms. Allocated memory is still 190.8 MB. Free memory was 163.6 MB in the beginning and 162.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 16:48:56,839 INFO L168 Benchmark]: Boogie Preprocessor took 19.57 ms. Allocated memory is still 190.8 MB. Free memory was 162.0 MB in the beginning and 160.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 16:48:56,840 INFO L168 Benchmark]: RCFGBuilder took 442.01 ms. Allocated memory is still 190.8 MB. Free memory was 160.4 MB in the beginning and 138.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-21 16:48:56,840 INFO L168 Benchmark]: TraceAbstraction took 695587.85 ms. Allocated memory was 190.8 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 138.4 MB in the beginning and 1.1 GB in the end (delta: -987.5 MB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. [2021-08-21 16:48:56,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 190.8 MB. Free memory was 172.5 MB in the beginning and 172.4 MB in the end (delta: 147.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 506.61 ms. Allocated memory is still 190.8 MB. Free memory was 154.1 MB in the beginning and 163.6 MB in the end (delta: -9.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.14 ms. Allocated memory is still 190.8 MB. Free memory was 163.6 MB in the beginning and 162.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.57 ms. Allocated memory is still 190.8 MB. Free memory was 162.0 MB in the beginning and 160.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 442.01 ms. Allocated memory is still 190.8 MB. Free memory was 160.4 MB in the beginning and 138.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 695587.85 ms. Allocated memory was 190.8 MB in the beginning and 2.1 GB in the end (delta: 1.9 GB). Free memory was 138.4 MB in the beginning and 1.1 GB in the end (delta: -987.5 MB). Peak memory consumption was 1.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 2298, positive: 1987, positive conditional: 1987, positive unconditional: 0, negative: 311, negative conditional: 311, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2007, positive: 1987, positive conditional: 0, positive unconditional: 1987, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 374, positive: 371, positive conditional: 0, positive unconditional: 371, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 374, positive: 371, positive conditional: 0, positive unconditional: 371, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2007, positive: 1616, positive conditional: 0, positive unconditional: 1616, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 374, unknown conditional: 0, unknown unconditional: 374] , Statistics on independence cache: Total cache size (in pairs): 374, Positive cache size: 371, Positive conditional cache size: 0, Positive unconditional cache size: 371, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 291 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 731]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 73 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 723]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 73 with TraceHistMax 5,while executing Executor. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 73 with TraceHistMax 5,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 695489.4ms, OverallIterations: 138, TraceHistogramMax: 8, EmptinessCheckTime: 226.3ms, AutomataDifference: 119515.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 208.5ms, PartialOrderReductionTime: 190.8ms, HoareTripleCheckerStatistics: 10217 SDtfs, 99368 SDslu, 121831 SDs, 0 SdLazy, 23920 SolverSat, 9720 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 28423.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13588 GetRequests, 7386 SyntacticMatches, 43 SemanticMatches, 6159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101512 ImplicationChecksByTransitivity, 115075.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2280occurred in iteration=117, InterpolantAutomatonStates: 4943, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2644.2ms AutomataMinimizationTime, 137 MinimizatonAttempts, 208581 StatesRemovedByMinimization, 137 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1322.4ms SsaConstructionTime, 3175.4ms SatisfiabilityAnalysisTime, 99082.9ms InterpolantComputationTime, 17216 NumberOfCodeBlocks, 17216 NumberOfCodeBlocksAsserted, 525 NumberOfCheckSat, 16948 ConstructedInterpolants, 18 QuantifiedInterpolants, 150593 SizeOfPredicates, 262 NumberOfNonLiveVariables, 20751 ConjunctsInSsa, 1777 ConjunctsInUnsatCore, 268 InterpolantComputations, 6 PerfectInterpolantSequences, 0/9202 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown